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Groups > linux.debian.user > #184367 > unrolled thread

Live recording

Started byRodolfo Medina <rodolfo.medina@gmail.com>
First post2017-07-28 21:20 +0200
Last post2017-07-31 09:40 +0200
Articles 20 on this page of 93 — 18 participants

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Contents

  Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-07-28 21:20 +0200
    Re: Live recording deloptes <deloptes@gmail.com> - 2017-07-28 22:40 +0200
      Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-03 14:30 +0200
        Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-03 14:40 +0200
          Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-03 15:20 +0200
            Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-03 15:50 +0200
              Re: Live recording David Wright <deblis@lionunicorn.co.uk> - 2017-08-03 17:10 +0200
                Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-03 17:50 +0200
                  Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-03 19:10 +0200
                    RE: Live recording "larry owens" <larrydowens6@att.net> - 2017-08-03 19:40 +0200
                    Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-03 20:30 +0200
                      Re: Live recording David Christensen <dpchrist@holgerdanske.com> - 2017-08-04 03:10 +0200
                        Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-04 09:20 +0200
                          Re: Live recording David Christensen <dpchrist@holgerdanske.com> - 2017-08-05 23:50 +0200
                            Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-06 18:40 +0200
                      Re: Live recording David Christensen <dpchrist@holgerdanske.com> - 2017-08-04 03:40 +0200
                        Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-04 09:10 +0200
                Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-03 20:20 +0200
            Re: Live recording Doug <dmcgarrett@optonline.net> - 2017-08-03 21:30 +0200
              Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-03 21:50 +0200
        Re: Live recording deloptes <deloptes@gmail.com> - 2017-08-04 01:30 +0200
          Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-04 10:00 +0200
            Re: Live recording Curt <curty@free.fr> - 2017-08-04 15:30 +0200
            Re: Live recording deloptes <deloptes@gmail.com> - 2017-08-04 19:50 +0200
              Re: Live recording Glenn English <ghe2001@gmail.com> - 2017-08-05 03:20 +0200
                Re: Live recording Curt <curty@free.fr> - 2017-08-05 11:50 +0200
                  Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-05 13:20 +0200
                  Re: Live recording Glenn English <ghe2001@gmail.com> - 2017-08-06 04:20 +0200
                    Re: Live recording Curt <curty@free.fr> - 2017-08-06 11:00 +0200
          Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-04 11:10 +0200
          [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-04 18:00 +0200
            Re: [solved] Re: Live recording Richard Hector <richard@walnut.gen.nz> - 2017-08-06 01:50 +0200
              Re: [solved] Re: Live recording Eike Lantzsch <zp6cge@gmx.net> - 2017-08-06 03:20 +0200
                Re: [solved] Re: Live recording Doug <dmcgarrett@optonline.net> - 2017-08-06 04:40 +0200
              Re: [solved] Re: Live recording Eike Lantzsch <zp6cge@gmx.net> - 2017-08-06 03:20 +0200
                Re: [solved] Re: Live recording Richard Hector <richard@walnut.gen.nz> - 2017-08-06 05:40 +0200
                  Re: [solved] Re: Live recording Joe <joe@jretrading.com> - 2017-08-06 10:20 +0200
              Re: [solved] Re: Live recording Eike Lantzsch <zp6cge@gmx.net> - 2017-08-06 03:30 +0200
              Re: [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-06 18:20 +0200
                Re: Live recording David Wright <deblis@lionunicorn.co.uk> - 2017-08-06 19:10 +0200
                  Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-06 20:30 +0200
                    Re: Live recording David Wright <deblis@lionunicorn.co.uk> - 2017-08-06 21:00 +0200
                      Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-06 22:20 +0200
                        Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-07 18:10 +0200
                          Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-07 20:00 +0200
                            Re: Live recording David Wright <deblis@lionunicorn.co.uk> - 2017-08-07 23:40 +0200
                              Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-08 00:50 +0200
                                Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-08 13:30 +0200
                                  Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-08 14:50 +0200
                Re: [solved] Re: Live recording David Christensen <dpchrist@holgerdanske.com> - 2017-08-06 23:10 +0200
                  Re: [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-07 08:00 +0200
                Re: [solved] Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-07 18:10 +0200
                  Re: [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-07 23:30 +0200
            Re: [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-14 23:10 +0200
              Re: [solved] Re: Live recording deloptes <deloptes@gmail.com> - 2017-08-15 01:50 +0200
                Re: [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-15 09:30 +0200
                  Re: [solved] Re: Live recording deloptes <deloptes@gmail.com> - 2017-08-15 13:10 +0200
                  Re: [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-16 03:10 +0200
                    Re: [solved] Re: Live recording Zenaan Harkness <zenaan@freedbms.net> - 2017-08-16 05:00 +0200
                      Re: [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-16 13:50 +0200
                        Re: [solved] Re: Live recording Zenaan Harkness <zenaan@freedbms.net> - 2017-08-16 15:50 +0200
                          Re: [solved] Re: Live recording Ric Moore <wayward4now@gmail.com> - 2017-08-16 17:20 +0200
                            Re: [solved] Re: Live recording Zenaan Harkness <zenaan@freedbms.net> - 2017-08-16 17:30 +0200
                          Re: [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-17 02:40 +0200
                            Re: [solved] Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-17 09:30 +0200
                              Re: [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-17 10:00 +0200
                                Re: [solved] Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-17 11:40 +0200
                                  Re: [solved] Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-18 10:50 +0200
    Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-07-28 22:50 +0200
    Re: Live recording David Christensen <dpchrist@holgerdanske.com> - 2017-07-29 08:00 +0200
      Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-07-29 08:20 +0200
        Re: Live recording deloptes <deloptes@gmail.com> - 2017-07-29 09:10 +0200
        Re: Live recording David Christensen <dpchrist@holgerdanske.com> - 2017-07-29 09:20 +0200
        Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-07-29 10:30 +0200
          Re: Live recording Weaver <weaver@riseup.net> - 2017-07-29 11:00 +0200
            Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-07-29 11:10 +0200
        Re: Live recording Doug <dmcgarrett@optonline.net> - 2017-07-29 23:20 +0200
        Re: Live recording Dan Ritter <dsr@randomstring.org> - 2017-07-31 17:20 +0200
        Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-01 23:10 +0200
          Re: Live recording deloptes <deloptes@gmail.com> - 2017-08-02 00:50 +0200
            Re: Live recording Fungi4All <fungilife@protonmail.com> - 2017-08-02 01:20 +0200
            Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-05 09:40 +0200
              Re: Live recording deloptes <deloptes@gmail.com> - 2017-08-05 19:20 +0200
                Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-07 09:20 +0200
                  Re: Live recording David Christensen <dpchrist@holgerdanske.com> - 2017-08-08 01:20 +0200
                    Re: Live recording David Christensen <dpchrist@holgerdanske.com> - 2017-08-08 01:30 +0200
              Re: Live recording Nicolas George <george@nsup.org> - 2017-08-05 19:30 +0200
          Re: Live recording David Christensen <dpchrist@holgerdanske.com> - 2017-08-02 08:20 +0200
            Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-02 08:50 +0200
              Re: Live recording Rodolfo Medina <rodolfo.medina@gmail.com> - 2017-08-02 09:10 +0200
                Re: Live recording Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> - 2017-08-02 09:20 +0200
              Re: Live recording David Christensen <dpchrist@holgerdanske.com> - 2017-08-03 04:00 +0200
    Re: Live recording Zenaan Harkness <zenaan@freedbms.net> - 2017-07-31 09:40 +0200

Page 3 of 5 — ← Prev page 1 2 [3] 4 5  Next page →


#184757

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-06 20:30 +0200
Message-ID<ubytk-5JT-19@gated-at.bofh.it>
In reply to#184753
David Wright <deblis@lionunicorn.co.uk> writes:

> On Sun 06 Aug 2017 at 18:18:46 (+0200), Rodolfo Medina wrote:
>> Richard Hector <richard@walnut.gen.nz> writes:
>> 
>> > On 05/08/17 03:56, Rodolfo Medina wrote:
>> >> Thanks to all.  The problem seems to be solved with such a cable:
>> >> 
>> >>  https://www.thomann.de/at/pro_snake_78219_yadapterkabel.htm
>> >
>> > Except that it's hard to tell what size those connectors are. Unless
>> > there's something in the description that I can't read that says they're
>> > 3.5mm, they look to me more like 6.25mm. I'm not sure what it is - I
>> > think 3.5mm plugs are usually more rounded on the end, while the larger
>> > ones often have that point. Also, it looks like the case comes apart,
>> > and I think the only ones I've seen with such skinny bodies are moulded
>> > plastic. If that's 3.5mm, I think it would be very hard to assemble by
>> > hand, which the body designs suggest.
>> 
>> 
>> The cable that made me possible to live record stereo from two mics, without
>> mixer nor preamp nor external audio card nor audio interface, is a 3.5mm
>> twin-mono-female and a 3.5mm single-stereo-male: the two mics plugged into
>> the two mono females and the stereo male plugged into the `mic' input of my
>> PC.  This cable was solded for me by the owner of the electricity shop near
>> my house.
>
> Glad you got one. (My Y cables are for sharing a single stereo output
> into two people's headsets.) The soldering solution I proposed earlier
> was specifically to avoid having to deal with soldering tiny wires into
> tiny plugs, practical in the past but no fun nowadays.
>
>> To add a third microphone for human voice (the former two are for piano), I
>> plan to use a second PC as suggested by Fungi4All.  This way I'll continue
>> to do without mixer or audio interface, till the moment I'll want to do
>> things more professionally.  Now, they're just home made records...
>
> Oh my, thoughts of Itchycoo Park come to mind. (Just showing my age.)
> I don't think you'll enjoy listening to the results..


Why do you think so?  Just recording with two mics in the Y cable you spoke
about produced a not bad result...

Rodolfo

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#184763

FromDavid Wright <deblis@lionunicorn.co.uk>
Date2017-08-06 21:00 +0200
Message-ID<ubyWm-5Tz-27@gated-at.bofh.it>
In reply to#184757
On Sun 06 Aug 2017 at 20:21:49 (+0200), Rodolfo Medina wrote:
> David Wright <deblis@lionunicorn.co.uk> writes:
> > On Sun 06 Aug 2017 at 18:18:46 (+0200), Rodolfo Medina wrote:
> >> The cable that made me possible to live record stereo from two mics, without
> >> mixer nor preamp nor external audio card nor audio interface, is a 3.5mm
> >> twin-mono-female and a 3.5mm single-stereo-male: the two mics plugged into
> >> the two mono females and the stereo male plugged into the `mic' input of my
> >> PC.  This cable was solded for me by the owner of the electricity shop near
> >> my house.
> >
> > Glad you got one. (My Y cables are for sharing a single stereo output
> > into two people's headsets.) The soldering solution I proposed earlier
> > was specifically to avoid having to deal with soldering tiny wires into
> > tiny plugs, practical in the past but no fun nowadays.
> >
> >> To add a third microphone for human voice (the former two are for piano), I
> >> plan to use a second PC as suggested by Fungi4All.  This way I'll continue
> >> to do without mixer or audio interface, till the moment I'll want to do
> >> things more professionally.  Now, they're just home made records...
> >
> > Oh my, thoughts of Itchycoo Park come to mind. (Just showing my age.)
> > I don't think you'll enjoy listening to the results..
> 
> 
> Why do you think so?  Just recording with two mics in the Y cable you spoke
> about produced a not bad result...

I'm assuming that your vocalist is being accompanied live (otherwise
the problem disappears by using a second pass) and is being
accompanied by said piano. So both PCs' recordings will have piano on
them. How do you mix than so that the phase of the piano signals is
preserved? It's not clear to me (but might be worth an experiment)
that you could avoid phasing effects or localisation (precedence effect)
instability. However, if it works, so be it. Give it a try. Perhaps
you can synchronise the recordings by minimising these very effects.

Cheers,
David.

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#184771

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-06 22:20 +0200
Message-ID<ubAbM-6NP-13@gated-at.bofh.it>
In reply to#184763
David Wright <deblis@lionunicorn.co.uk> writes:

> On Sun 06 Aug 2017 at 20:21:49 (+0200), Rodolfo Medina wrote:
>> David Wright <deblis@lionunicorn.co.uk> writes:
>> > On Sun 06 Aug 2017 at 18:18:46 (+0200), Rodolfo Medina wrote:
>> >> The cable that made me possible to live record stereo from two mics,
>> >> without mixer nor preamp nor external audio card nor audio interface, is
>> >> a 3.5mm twin-mono-female and a 3.5mm single-stereo-male: the two mics
>> >> plugged into the two mono females and the stereo male plugged into the
>> >> `mic' input of my PC.  This cable was solded for me by the owner of the
>> >> electricity shop near my house.
>> >
>> > Glad you got one. (My Y cables are for sharing a single stereo output
>> > into two people's headsets.) The soldering solution I proposed earlier
>> > was specifically to avoid having to deal with soldering tiny wires into
>> > tiny plugs, practical in the past but no fun nowadays.
>> >
>> >> To add a third microphone for human voice (the former two are for piano),
>> >> I plan to use a second PC as suggested by Fungi4All.  This way I'll
>> >> continue to do without mixer or audio interface, till the moment I'll
>> >> want to do things more professionally.  Now, they're just home made
>> >> records...
>> >
>> > Oh my, thoughts of Itchycoo Park come to mind. (Just showing my age.)
>> > I don't think you'll enjoy listening to the results..
>> 
>> 
>> Why do you think so?  Just recording with two mics in the Y cable you spoke
>> about produced a not bad result...
>
> I'm assuming that your vocalist is being accompanied live (otherwise
> the problem disappears by using a second pass) and is being
> accompanied by said piano.


Exactly.


> So both PCs' recordings will have piano on them.

Yes.



> How do you mix than so that the phase of the piano signals is
> preserved? It's not clear to me (but might be worth an experiment)
> that you could avoid phasing effects or localisation (precedence effect)
> instability. However, if it works, so be it. Give it a try. Perhaps
> you can synchronise the recordings by minimising these very effects.


Mmmmm...  Otherwise I'll have to buy a mixer.

Rodolfo

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#184822

FromJeremy Nicoll <jn.ml.dbn.25@letterboxes.org>
Date2017-08-07 18:10 +0200
Message-ID<ubSLq-2uu-59@gated-at.bofh.it>
In reply to#184771
On Sun, 6 Aug 2017, at 21:09, Rodolfo Medina wrote:

> Mmmmm...  Otherwise I'll have to buy a mixer.
> 
> Rodolfo

If you can capture multiple channels' audio and have them in separate
files
on your computer then you can mix them using  sox.   You don't have to
have 
a physical mixer.

-- 
Jeremy Nicoll - my opinions are my own.

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#184840

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-07 20:00 +0200
Message-ID<ubUtQ-3uU-17@gated-at.bofh.it>
In reply to#184822
Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> writes:

> On Sun, 6 Aug 2017, at 21:09, Rodolfo Medina wrote:
>
>> Mmmmm...  Otherwise I'll have to buy a mixer.
>> 
>> Rodolfo
>
> If you can capture multiple channels' audio and have them in separate files
> on your computer then you can mix them using sox.  You don't have to have a
> physical mixer.


Yes, but I was referring to the time delay problem that has been arised by some
listers...

Rodolfo

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#184857

FromDavid Wright <deblis@lionunicorn.co.uk>
Date2017-08-07 23:40 +0200
Message-ID<ubXUK-6aH-31@gated-at.bofh.it>
In reply to#184840
On Mon 07 Aug 2017 at 19:56:34 (+0200), Rodolfo Medina wrote:
> Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> writes:
> 
> > On Sun, 6 Aug 2017, at 21:09, Rodolfo Medina wrote:
> >
> >> Mmmmm...  Otherwise I'll have to buy a mixer.
> >> 
> >> Rodolfo
> >
> > If you can capture multiple channels' audio and have them in separate files
> > on your computer then you can mix them using sox.  You don't have to have a
> > physical mixer.
> 
> 
> Yes, but I was referring to the time delay problem that has been arised by some
> listers...

That was me, and we had moved on to multiple PCs, whereas now we're
back to talking about one PC with multiple channels.

Back to two PCs, it did occur to me that if you mix your L/R from the
piano onto one channel of the final mix and use the singer's mic in
the other, you might get fewer artificial effects, particularly with
speakers because the room contributes plenty of muddling.

Way back in 1958, the BBC tried experimenting with stereo broadcasts
on Saturday mornings using TV for one channel and the Third Programme
(radio) for the other. Naturally there was a lot of strolling around
the studio at their end and fighting over the hot seat at our end. But
without any other experience of stereo sound (in the true "solid"
sense of the word), it's difficult for me to recall how well the
effect was transferred to our living room. Nor do I know how similar
the signal processing timing was between a cheap, inherited, Band I TV
and a state of the art Leak Trough-Line Band II tuner. With TV chassis
floating at mains potential, there was not much thought of mixing the
channels or tape recording them.

Cheers,
David.

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#184860

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-08 00:50 +0200
Message-ID<ubZ0t-6St-1@gated-at.bofh.it>
In reply to#184857
David Wright <deblis@lionunicorn.co.uk> writes:

> On Mon 07 Aug 2017 at 19:56:34 (+0200), Rodolfo Medina wrote:
>> Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> writes:
>> 
>> > On Sun, 6 Aug 2017, at 21:09, Rodolfo Medina wrote:
>> >
>> >> Mmmmm...  Otherwise I'll have to buy a mixer.
>> >> 
>> >> Rodolfo
>> >
>> > If you can capture multiple channels' audio and have them in separate
>> > files on your computer then you can mix them using sox.  You don't have to
>> > have a physical mixer.
>> 
>> 
>> Yes, but I was referring to the time delay problem that has been arised by
>> some
>> listers...
>
> That was me, and we had moved on to multiple PCs, whereas now we're
> back to talking about one PC with multiple channels.
>
> Back to two PCs, it did occur to me that if you mix your L/R from the
> piano onto one channel of the final mix and use the singer's mic in
> the other, you might get fewer artificial effects, particularly with
> speakers because the room contributes plenty of muddling.

Well, no, I tought of: left channel on piano bass, right channel onto piano
high notes and voice, say, somewhere in the middle...


> Way back in 1958, the BBC tried experimenting with stereo broadcasts
> on Saturday mornings using TV for one channel and the Third Programme
> (radio) for the other. Naturally there was a lot of strolling around
> the studio at their end and fighting over the hot seat at our end. But
> without any other experience of stereo sound (in the true "solid"
> sense of the word), it's difficult for me to recall how well the
> effect was transferred to our living room. Nor do I know how similar
> the signal processing timing was between a cheap, inherited, Band I TV
> and a state of the art Leak Trough-Line Band II tuner. With TV chassis
> floating at mains potential, there was not much thought of mixing the
> channels or tape recording them.


Fascinating...!  But now I got very interested in the multi channel audio
interface you suggest...  Before looking for one to buy, I'd like to better
know and understand how it works...  For example in the case of piano (two mono
mics) and voice (1 mic, say mono as well)...

Cheers,
Rodolfo

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#184886

FromJeremy Nicoll <jn.ml.dbn.25@letterboxes.org>
Date2017-08-08 13:30 +0200
Message-ID<ucaRX-7FO-1@gated-at.bofh.it>
In reply to#184860
On Mon, 7 Aug 2017, at 23:41, Rodolfo Medina wrote:

> Fascinating...!  But now I got very interested in the multi channel audio
> interface you suggest...  Before looking for one to buy, I'd like to
> better
> know and understand how it works...  

They're just boxes which can have more than two mics (or line-level
signals
eg from instruments) plugged into them.  Inside there's multiple
analogue-
to-digital converters.  The digital data from all of these is then sent
along 
the USB connection to the computer.  Some interfaces might send all the 
channels so they arrive in a single file on the computer, which then
contains
multiple separate channels, others may directly generate separate files
on 
the computer.

It's unimportant which you get because a file containing multiple
channels
can be split into separate files (with eg sox), or a set of files can be
combined
(with eg sox).


I can't advise you on what to buy...  because I suspect you're going to
spend a
great deal less than I did when I last bought one...   That was a Tascam
box:

http://tascam.com/product/us-2000/

which you'll see can handle 16 separate inputs at once...  There's a
more recent 
version of that these days...   A box like that is aimed at people used
to using 
professional audio equipment.  

There will be lower-spec interfaces around too, but you obviously need
to find 
one that's known to work with linux.  You also probably don't want one
with 
eg XLR sockets for mics.

-- 
Jeremy Nicoll - my opinions are my own.

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#184890

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-08 14:50 +0200
Message-ID<ucc7o-8sm-23@gated-at.bofh.it>
In reply to#184886
Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> writes:

> On Mon, 7 Aug 2017, at 23:41, Rodolfo Medina wrote:
>
>> Fascinating...!  But now I got very interested in the multi channel audio
>> interface you suggest...  Before looking for one to buy, I'd like to
>> better
>> know and understand how it works...  
>
> They're just boxes which can have more than two mics (or line-level signals
> eg from instruments) plugged into them.  Inside there's multiple analogue-
> to-digital converters.  The digital data from all of these is then sent along
> the USB connection to the computer.  Some interfaces might send all the
> channels so they arrive in a single file on the computer, which then contains
> multiple separate channels, others may directly generate separate files on
> the computer.
>
> It's unimportant which you get because a file containing multiple channels
> can be split into separate files (with eg sox), or a set of files can be
> combined (with eg sox).
>
>
> I can't advise you on what to buy...  because I suspect you're going to spend
> a great deal less than I did when I last bought one...  That was a Tascam
> box:
>
> http://tascam.com/product/us-2000/
>
> which you'll see can handle 16 separate inputs at once...  There's a more
> recent version of that these days...  A box like that is aimed at people used
> to using professional audio equipment.


Your explanation is just what I was looking for...  Very simple and clear.
Here:

 https://stackoverflow.com/questions/14950823/sox-exe-mixing-mono-vocals-with-stereo-music

it is shown how to operate with sox the way you said.


> There will be lower-spec interfaces around too, but you obviously need to
> find one that's known to work with linux.  You also probably don't want one
> with eg XLR sockets for mics.


Yes, as far as I understand this is probably the main problem: find something
that works with Linux...

Thanks indeed,

Cheers,

Rodolfo

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#184774 — Re: [solved] Re: Live recording

FromDavid Christensen <dpchrist@holgerdanske.com>
Date2017-08-06 23:10 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<ubAY9-7l9-1@gated-at.bofh.it>
In reply to#184749
On 08/06/17 09:18, Rodolfo Medina wrote:
> The cable that made me possible to live record stereo from two mics, without
> mixer nor preamp nor external audio card nor audio interface, is a 3.5mm
> twin-mono-female and a 3.5mm single-stereo-male: the two mics plugged into the
> two mono females and the stereo male plugged into the `mic' input of my PC.
> This cable was solded for me by the owner of the electricity shop near my
> house.

That is called a stereo break-out cable:

http://hosatech.com/product/ymm-261/


> To add a third microphone for human voice (the former two are for piano), I
> plan to use a second PC as suggested by Fungi4All.  This way I'll continue to
> do without mixer or audio interface, till the moment I'll want to do things
> more professionally.  Now, they're just home made records...

As I understand it, professional digital audio recording gear includes 
clock in and clock out connectors.  All the devices are linked together 
with cables, one device serves as the master clock, and all the other 
devices are slaves.


Without hardware clock synchronization, the clocks for the various 
recording devices will drift ("clock skew") and the recordings will lose 
time alignment.  One work-around is to record audible synchronizing 
marks near the beginning of a take and near the end -- e.g. strike two 
sticks together, clap your hands, use a "clicker" device, etc..  Then 
during editing/ mix-down, use digital audio workstation software with 
time-stretch/ time-compression/ time-alignment features to adjust the 
individual recordings until all the synchronizing marks line up exactly.


David

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#184785 — Re: [solved] Re: Live recording

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-07 08:00 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<ubJf4-4dI-7@gated-at.bofh.it>
In reply to#184774
David Christensen <dpchrist@holgerdanske.com> writes:

> On 08/06/17 09:18, Rodolfo Medina wrote:
>> The cable that made me possible to live record stereo from two mics, without
>> mixer nor preamp nor external audio card nor audio interface, is a 3.5mm
>> twin-mono-female and a 3.5mm single-stereo-male: the two mics plugged into
>> the two mono females and the stereo male plugged into the `mic' input of my
>> PC.  This cable was solded for me by the owner of the electricity shop near
>> my house.
>
> That is called a stereo break-out cable:
>
> http://hosatech.com/product/ymm-261/
>
>
>> To add a third microphone for human voice (the former two are for piano), I
>> plan to use a second PC as suggested by Fungi4All.  This way I'll continue
>> to do without mixer or audio interface, till the moment I'll want to do
>> things more professionally.  Now, they're just home made records...
>
> As I understand it, professional digital audio recording gear includes clock
> in and clock out connectors.  All the devices are linked together with
> cables, one device serves as the master clock, and all the other devices are
> slaves.
>
>
> Without hardware clock synchronization, the clocks for the various recording
> devices will drift ("clock skew") and the recordings will lose time
> alignment.  One work-around is to record audible synchronizing marks near the
> beginning of a take and near the end -- e.g. strike two sticks together, clap
> your hands, use a "clicker" device, etc..  Then during editing/ mix-down, use
> digital audio workstation software with time-stretch/ time-compression/
> time-alignment features to adjust the individual recordings until all the
> synchronizing marks line up exactly.


It seems that Audacity can do that...

Rodolfo

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#184821 — Re: [solved] Re: Live recording

FromJeremy Nicoll <jn.ml.dbn.25@letterboxes.org>
Date2017-08-07 18:10 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<ubSLp-2uu-43@gated-at.bofh.it>
In reply to#184749
On Sun, 6 Aug 2017, at 17:18, Rodolfo Medina wrote:

> To add a third microphone for human voice (the former two are for piano),
> I plan to use a second PC as suggested by Fungi4All.  This way I'll
> continue to do without mixer or audio interface, till the moment I'll want 
> to do things more professionally.  Now, they're just home made records...

The single best reason for using a multi-channel (ie not just a stereo)
audio 
interface is simplicity.  All the channels will be in-sync with each
other and 
all the audio signals can be captured on a single computer.

-- 
Jeremy Nicoll - my opinions are my own.

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#184856 — Re: [solved] Re: Live recording

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-07 23:30 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<ubXL4-62i-23@gated-at.bofh.it>
In reply to#184821
Jeremy Nicoll <jn.ml.dbn.25@letterboxes.org> writes:

> On Sun, 6 Aug 2017, at 17:18, Rodolfo Medina wrote:
>
>> To add a third microphone for human voice (the former two are for piano),
>> I plan to use a second PC as suggested by Fungi4All.  This way I'll
>> continue to do without mixer or audio interface, till the moment I'll want 
>> to do things more professionally.  Now, they're just home made records...
>
> The single best reason for using a multi-channel (ie not just a stereo) audio
> interface is simplicity.  All the channels will be in-sync with each other
> and all the audio signals can be captured on a single computer.


...within different files...?

Thanks,

Rodolfo

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#185224 — Re: [solved] Re: Live recording

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-14 23:10 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<ueuMx-IV-13@gated-at.bofh.it>
In reply to#184641
Rodolfo Medina <rodolfo.medina@gmail.com> writes:

> Rodolfo Medina <rodolfo.medina@gmail.com> writes:
>
>> According to:
>>
>>  http://www.upubuntu.com/2013/05/how-to-record-your-voice-from.html
>>
>> I record live sound via microphone just doing:
>>
>>  $ sox -t alsa default output.wav
>>
>> Now I was wondering about the stereo o non-stereo character of such a home
>> made recording...  I tried to use two microphones together, plugging them
>> together into the PC with a small common connection doubber.  Can we say the
>> result is stereo...?  I would doubt...  and how to have - if possible - a
>> stereo effect with the above basic recording instruments?
>
>
>
>
> Thanks to all.  The problem seems to be solved with such a cable:
>
>  https://www.thomann.de/at/pro_snake_78219_yadapterkabel.htm

Well, actually better this one:

 http://hosatech.com/product/ymm-261/

> as suggested by deloptes and other listers.  The cable consists in two female
> 3.5mm terminations, each of them mono, and a male 3.5mm stereo.  One mic at
> one female end, the other one at the other female end, and the male end
> plugged into the microphone input of my netbook.  All this seems to produce a
> perfect stereo effect: the two channels sound to be very well separated.
>
> I'll be using the above simple connection system to live piano recording: mic
> 1 on the basses (left), mic 2 on the high (right).
>
> My next step is trying to add human voice, say in the middle.  I'll see if
> this is possible by slightly complicating the above solution, without preamp
> or mixer or multi-channel audio interface.  I'll be posting here if the
> attempt succeeds.


For human voice, I bought a USB audio card and plugged a third microphone into
it.  So now I have:

 mic1 for piano basses; |__________ plugged together into the
 mic2 for piano highs;  |           above Y cable
 mic3 for voice         -> -> -> -> plugged into the USB dongle.

Then I do:

 $ sox -t alsa default piano.wav

and, at the same time, on another xterm session,

 $ sox -t alsa wh:2,0 voice.wav

where wh:2,0 is the USB device (do: `arecord -l' first).  This way I get two
audio files: piano.wav and voice.wav.  The first one is stereo and the second
is mono.  In the end I merge the two together with Audacity.  By default,
Audacity puts the mono file just in the middle between left and right channel;
but, if you like, you can have it weight more left or more right, in the
percentage you want.  I must say that the result is acceptable, and more...

Thanks,

Rodolfo

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#185231 — Re: [solved] Re: Live recording

Fromdeloptes <deloptes@gmail.com>
Date2017-08-15 01:50 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<uexhn-24Q-1@gated-at.bofh.it>
In reply to#185224
> 
> For human voice, I bought a USB audio card and plugged a third microphone
> into
> it.  So now I have:
> 
>  mic1 for piano basses; |__________ plugged together into the
>  mic2 for piano highs;  |           above Y cable
>  mic3 for voice         -> -> -> -> plugged into the USB dongle.
> 
> Then I do:
> 
>  $ sox -t alsa default piano.wav
> 
> and, at the same time, on another xterm session,
> 
>  $ sox -t alsa wh:2,0 voice.wav
> 
> where wh:2,0 is the USB device (do: `arecord -l' first).  This way I get
> two
> audio files: piano.wav and voice.wav.  The first one is stereo and the
> second
> is mono.  In the end I merge the two together with Audacity.  By default,
> Audacity puts the mono file just in the middle between left and right
> channel; but, if you like, you can have it weight more left or more right,
> in the
> percentage you want.  I must say that the result is acceptable, and
> more...
> 
Why not do all that directly in Audacity? I am sure it works and it will
take care of the timing automatically

regards

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#185237 — Re: [solved] Re: Live recording

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-15 09:30 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<ueEsz-6Lw-21@gated-at.bofh.it>
In reply to#185231
deloptes <deloptes@gmail.com> writes:

>> 
>> For human voice, I bought a USB audio card and plugged a third microphone
>> into
>> it.  So now I have:
>> 
>>  mic1 for piano basses; |__________ plugged together into the
>>  mic2 for piano highs;  |           above Y cable
>>  mic3 for voice         -> -> -> -> plugged into the USB dongle.
>> 
>> Then I do:
>> 
>>  $ sox -t alsa default piano.wav
>> 
>> and, at the same time, on another xterm session,
>> 
>>  $ sox -t alsa wh:2,0 voice.wav
>> 
>> where wh:2,0 is the USB device (do: `arecord -l' first).  This way I get
>> two
>> audio files: piano.wav and voice.wav.  The first one is stereo and the
>> second
>> is mono.  In the end I merge the two together with Audacity.  By default,
>> Audacity puts the mono file just in the middle between left and right
>> channel; but, if you like, you can have it weight more left or more right,
>> in the
>> percentage you want.  I must say that the result is acceptable, and
>> more...
>> 
> Why not do all that directly in Audacity? I am sure it works and it will
> take care of the timing automatically


Thanks, I'll have a try.  But can we say that all this allows us to do without
mixer or multi-channel audio interface...?  In fact, I suppose I could even add
some other USB cards if I wanted to add more instruments, say a violin...

Cheers,

Rodolfo

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#185246 — Re: [solved] Re: Live recording

Fromdeloptes <deloptes@gmail.com>
Date2017-08-15 13:10 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<ueHTs-xi-11@gated-at.bofh.it>
In reply to#185237
> 
> 
> Thanks, I'll have a try.  But can we say that all this allows us to do
> without
> mixer or multi-channel audio interface...?  In fact, I suppose I could
> even add some other USB cards if I wanted to add more instruments, say a
> violin...
> 
> Cheers,
> 
> Rodolfo

there are always some physical limitations, so it depends on your computer,
if it is usb3, how the usb are implemented etc.

you can always try

regards

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#185319 — Re: [solved] Re: Live recording

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-16 03:10 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<ueV0l-nH-3@gated-at.bofh.it>
In reply to#185237
Rodolfo Medina <rodolfo.medina@gmail.com> writes:

> deloptes <deloptes@gmail.com> writes:
>
>>> 
>>> For human voice, I bought a USB audio card and plugged a third microphone
>>> into it.  So now I have:
>>> 
>>>  mic1 for piano basses; |__________ plugged together into the
>>>  mic2 for piano highs;  |           above Y cable
>>>  mic3 for voice         -> -> -> -> plugged into the USB dongle.
>>> 
>>> Then I do:
>>> 
>>>  $ sox -t alsa default piano.wav
>>> 
>>> and, at the same time, on another xterm session,
>>> 
>>>  $ sox -t alsa wh:2,0 voice.wav
>>> 
>>> where wh:2,0 is the USB device (do: `arecord -l' first).  This way I get
>>> two audio files: piano.wav and voice.wav.  The first one is stereo and the
>>> second is mono.  In the end I merge the two together with Audacity.  By
>>> default, Audacity puts the mono file just in the middle between left and
>>> right channel; but, if you like, you can have it weight more left or more
>>> right, in the percentage you want.  I must say that the result is
>>> acceptable, and more...
>>> 
>> Why not do all that directly in Audacity? I am sure it works and it will
>> take care of the timing automatically
>
>
> Thanks, I'll have a try.


Apparently, Audacity doesn't let you record simultaneously from two or more
sources...  you have to choose one source.

Rodolfo

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#185326 — Re: [solved] Re: Live recording

FromZenaan Harkness <zenaan@freedbms.net>
Date2017-08-16 05:00 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<ueWIN-1kI-1@gated-at.bofh.it>
In reply to#185319
On Wed, Aug 16, 2017 at 03:03:46AM +0200, Rodolfo Medina wrote:
> Rodolfo Medina <rodolfo.medina@gmail.com> writes:
> 
> > deloptes <deloptes@gmail.com> writes:
> >
> >>> 
> >>> For human voice, I bought a USB audio card and plugged a third microphone
> >>> into it.  So now I have:
> >>> 
> >>>  mic1 for piano basses; |__________ plugged together into the
> >>>  mic2 for piano highs;  |           above Y cable
> >>>  mic3 for voice         -> -> -> -> plugged into the USB dongle.
> >>> 
> >>> Then I do:
> >>> 
> >>>  $ sox -t alsa default piano.wav
> >>> 
> >>> and, at the same time, on another xterm session,
> >>> 
> >>>  $ sox -t alsa wh:2,0 voice.wav
> >>> 
> >>> where wh:2,0 is the USB device (do: `arecord -l' first).  This way I get
> >>> two audio files: piano.wav and voice.wav.  The first one is stereo and the
> >>> second is mono.  In the end I merge the two together with Audacity.  By
> >>> default, Audacity puts the mono file just in the middle between left and
> >>> right channel; but, if you like, you can have it weight more left or more
> >>> right, in the percentage you want.  I must say that the result is
> >>> acceptable, and more...
> >>> 
> >> Why not do all that directly in Audacity? I am sure it works and it will
> >> take care of the timing automatically
> >
> >
> > Thanks, I'll have a try.
> 
> 
> Apparently, Audacity doesn't let you record simultaneously from two or more
> sources...  you have to choose one source.

Ardour should only take half a day to start using - it absolutely
rocks - high end DAW FTW :D

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#185346 — Re: [solved] Re: Live recording

FromRodolfo Medina <rodolfo.medina@gmail.com>
Date2017-08-16 13:50 +0200
SubjectRe: [solved] Re: Live recording
Message-ID<uf4ZI-6ww-19@gated-at.bofh.it>
In reply to#185326
Zenaan Harkness <zenaan@freedbms.net> writes:

> On Wed, Aug 16, 2017 at 03:03:46AM +0200, Rodolfo Medina wrote:
>> Rodolfo Medina <rodolfo.medina@gmail.com> writes:
>> 
>> > deloptes <deloptes@gmail.com> writes:
>> >
>> >>> 
>> >>> For human voice, I bought a USB audio card and plugged a third
>> >>> microphone into it.  So now I have:
>> >>> 
>> >>>  mic1 for piano basses; |__________ plugged together into the
>> >>>  mic2 for piano highs;  |           above Y cable
>> >>>  mic3 for voice         -> -> -> -> plugged into the USB dongle.
>> >>> 
>> >>> Then I do:
>> >>> 
>> >>>  $ sox -t alsa default piano.wav
>> >>> 
>> >>> and, at the same time, on another xterm session,
>> >>> 
>> >>>  $ sox -t alsa wh:2,0 voice.wav
>> >>> 
>> >>> where wh:2,0 is the USB device (do: `arecord -l' first).  This way I get
>> >>> two audio files: piano.wav and voice.wav.  The first one is stereo and
>> >>> the second is mono.  In the end I merge the two together with Audacity.
>> >>> By default, Audacity puts the mono file just in the middle between left
>> >>> and right channel; but, if you like, you can have it weight more left or
>> >>> more right, in the percentage you want.  I must say that the result is
>> >>> acceptable, and more...
>> >>> 
>> >> Why not do all that directly in Audacity? I am sure it works and it will
>> >> take care of the timing automatically
>> >
>> >
>> > Thanks, I'll have a try.
>> 
>> 
>> Apparently, Audacity doesn't let you record simultaneously from two or more
>> sources...  you have to choose one source.
>
> Ardour should only take half a day to start using - it absolutely
> rocks - high end DAW FTW :D


Thanks...  As far as I see, Ardour and Jack are powerful tools...  On the other
hand, with the above recording procedure, i.e. several simultaneous sessions of
sox, no drifting or latency effects did I appreciate at all...  So it is maybe
worth for me to continue that way till the moment such problems will arise...

Rodolfo

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