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soundcard distortion bis

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I raised an issue some time ago about sound distortion, and at the time
thought I had fixed it adding the line

  options snd slots=snd-virtuoso,snd-hda-intel,snd-hda-intel

at the end of /etc/modrobe.d/alsa-base.conf. But sound still
stutters. 

When I start AlsaPlayer afresh and load a CD, chances are that it will
play satisfactorily. But normally can't get a second CD to play without
closing and reopening alsa-player.

If I try, typical is that the tracks of the new CD take rather longer
to display, the play button does not return to the first track unless I
wait for a long time such as ten minutes. It is usually hung, if it does
start playing, the sound stutters or drops out at points.

I'd like to know if this sounds like a driver issue and if so what is an
appropriate method to resolve it.

The audio card is an Asus Xonar DS PCI Express 7.1 running on Debian
Wheezy. I've installed the nvidia driver. In /etc/X11/xorg.conf.d I have
the stanza

    Section "Device"
        Identifier "GeForce GT 730"
        Driver "nvidia"
    EndSection

Am I correct to assume my problem is with ALSA drivers, and so I need
not worry about the nvidia driver? 

Here are the loaded ALSA modules, leaving out the USB modules for my
Logitek camera:

  $ lsmod | grep snd
  snd_ctxfi              62598  0    
  snd_hda_codec_hdmi     26352  1 
  snd_hda_intel          21786  0 
  snd_hda_codec          63477  2 snd_hda_intel,snd_hda_codec_hdmi 
  snd_hwdep              12943  2 snd_usb_audio,snd_hda_codec
  snd_virtuoso           33765  0 
  snd_oxygen_lib         27905  1 snd_virtuoso
  snd_mpu401_uart        13299  1 snd_oxygen_lib
  snd_seq_midi           12744  0 
  snd_seq_midi_event     13124  1 snd_seq_midi
  snd_rawmidi            22472  3 snd_seq_midi,snd_mpu401_uart, \
    snd_usbmidi_lib 
  snd_pcm                53461  6
  snd_oxygen_lib,snd_usb_audio,snd_hda_codec,snd_hda_intel, \
    snd_hda_codec_hdmi,snd_ctxfi
  snd_page_alloc         12867  3 snd_pcm,snd_hda_intel,snd_ctxfi
  snd_seq                39512  2 snd_seq_midi_event,snd_seq_midi
  snd_seq_device         13016  3 snd_seq,snd_rawmidi,snd_seq_midi
  snd_timer              22356  2 snd_seq,snd_pcm
  snd                    42761  15
  snd_timer,snd_seq_device,snd_seq,snd_pcm, \
    snd_rawmidi,snd_mpu401_uart,snd_oxygen_lib,snd_virtuoso,snd_hwdep,\ 
    snd_usbmidi_lib,snd_usb_audio,snd_hda_codec,snd_hda_intel, \
    snd_hda_codec_hdmi,snd_ctxfi
  soundcore              12921  1 snd

The ctxfi seems to be a fossil driver left over from a failed attempt to
install a Titanium card. The virtuoso is my Xonar card driver.

Haines Brown

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Thread

soundcard distortion bis Haines Brown <haines@engels.histomat.net> - 2015-02-26 16:22 -0500
  Re: soundcard distortion bis Carpe Diem <carpe.diem@news.com> - 2015-02-27 07:36 +0100
  Re: soundcard distortion bis Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2015-02-27 06:37 +0000
    Re: soundcard distortion bis Haines Brown <haines@engels.histomat.net> - 2015-02-27 12:44 -0500
      Re: soundcard distortion bis Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2015-02-28 08:05 +0000
        Re: soundcard distortion bis [solved] Haines Brown <haines@engels.histomat.net> - 2015-03-19 20:27 -0400

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