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Groups > sci.electronics.design > #462180
| From | Jan Panteltje <pNa0nStpealmtje@yahoo.com> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: Quad Potentiometer - Does such a thing exist? |
| Date | 2017-05-29 16:55 +0000 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <oghjpu$uki$1@gioia.aioe.org> (permalink) |
| References | <44gnic1587eql5ed4oi6m75j8nj60hg4rk@4ax.com> <oghfhu012g4@drn.newsguy.com> |
On a sunny day (29 May 2017 08:42:54 -0700) it happened Winfield Hill <hill@rowland.harvard.edu> wrote in <oghfhu012g4@drn.newsguy.com>: >oldschool@tubes.com wrote... >> >> My goal is to take a 4 channel (quad) sound system ... > > How about reading the value of a single pot, calculating > the desired gains and combinations, and use multiplying > DACs to effect the fractional sourcing for each output. > Hey, you'll only need 16 DACs to cover all combinations! > > Haha, that makes it clear why digitizing four channels > and computing new outputs in real time makes more sense. > Try an Arduino Zero running at 48MHz, easy programming. > Or step up to the Teensy 3.6, fast, 180 MHz. Advantage: > extensive audio libraries written by Paul J. Stoffregen. > Plug Teensy into an adapter board to use Arduino shields. 16 DACs? 4 channels? 160 MHz? In the attic I think I may still have some of those Philips i2c controlled audio potmeters.. something like TDA7318 http://www.google.nl/url?q=http://www.st.com/resource/en/datasheet/CD00000150.pdf&sa=U&ved=0ahUKEwiE4KXZx5XUAhVHa1AKHT9rDmgQFggdMAE&usg=AFQjCNEcL7w0MpY1BLp4p4nmeLezQcOY9w then all you need is 2 (or 4) of these and a 2$ PIC to read a rotary encoder and send the i2c to those chips. Maybe sine cos lookup table, depends. Digitizing causes latency.. why bother. ? 4 MHz internal clock.
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Quad Potentiometer - Does such a thing exist? oldschool@tubes.com - 2017-05-29 03:51 -0400
Re: Quad Potentiometer - Does such a thing exist? Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-29 09:23 +0000
Re: Quad Potentiometer - Does such a thing exist? gray_wolf <g_wolf@nospam.com> - 2017-05-29 04:28 -0500
Re: Quad Potentiometer - Does such a thing exist? tabbypurr@gmail.com - 2017-05-29 02:58 -0700
Re: Quad Potentiometer - Does such a thing exist? "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-05-29 05:54 -0500
Quad Potentiometer - Does such a thing exist? Anthony Stewart <tony.sunnysky@gmail.com> - 2017-05-29 07:38 -0700
Re: Quad Potentiometer - Does such a thing exist? Winfield Hill <hill@rowland.harvard.edu> - 2017-05-29 08:42 -0700
Re: Quad Potentiometer - Does such a thing exist? Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-29 16:55 +0000
Re: Quad Potentiometer - Does such a thing exist? Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-29 17:18 +0000
Re: Quad Potentiometer - Does such a thing exist? speff <spehro@gmail.com> - 2017-05-29 10:31 -0700
Re: Quad Potentiometer - Does such a thing exist? Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-29 18:17 +0000
Re: Quad Potentiometer - Does such a thing exist? krw@notreal.com - 2017-05-29 14:29 -0400
Re: Quad Potentiometer - Does such a thing exist? Winfield Hill <hill@rowland.harvard.edu> - 2017-05-29 10:29 -0700
Re: Quad Potentiometer - Does such a thing exist? Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-29 18:10 +0000
Re: Quad Potentiometer - Does such a thing exist? Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-31 11:46 +0000
Re: Quad Potentiometer - Does such a thing exist? Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-31 14:29 +0000
Re: Quad Potentiometer - Does such a thing exist? Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2017-05-29 23:45 +0200
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