bin/45678: cdplay produces no sound

[idleroux%fastmail.fm@localhost]

>Number:         45678
>Category:       bin
>Synopsis:       cdplay produces no sound
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Dec 03 11:20:00 +0000 2011
>Originator:     Ian D. Leroux
>Release:        -current, sources checked out 2011/11/14
>Organization:
Aarhus Universitet
>Environment:
NetBSD scrameustache.dyndns.org 5.99.56 NetBSD 5.99.56 (SCRAMEUSTACHE) #1: Mon 
Nov 14 20:48:20 CET 2011  
idleroux%scrameustache.dyndns.org@localhost:/build/obj/sys/arch/amd64/compile/SCRAMEUSTACHE
 amd64

>Description:
Playing an audio CD with cdplay no longer produces audible output.
The status output looks normal:
  $ cdplay status
  audio status: playing
  current track:        1
  current index:        1
  position:     0:11.73
  shuffle play: off
  digital xfer: off
  media catalog:        active (0602498840399)
  left volume:  255
  right volume: 255
and the "position" counter increases as it should, but no sound is produced.

Playing the same audio CD on the same machine running under another operating 
system produces music as expected, which indicates that the hardware is still 
ok.

Playing digital music files with mplayer under NetBSD produces music as 
expected, so the speakers and audio card seem to be working.  For reference:
  $ dmesg |grep audio
  hdaudio0 at pci0 dev 27 function 0: HD Audio Controller
  hdaudio0: interrupting at ioapic0 pin 17
  hdafg0 at hdaudio0: Conexant CX20585
  audio0 at hdafg0: full duplex, playback, capture, independent
  hdvsmfg at hdaudio0 not configured
  hdafg1 at hdaudio0: Intel G45 HDMI
  audio at pad0 not configured

I can obtain a track list using
  $ cdplay info
  track     start  duration   block  length     type
  --------------------------------------------------
      1   0:02.00   2:47.63       0   12588    audio
      2   2:49.63   2:44.52   12588   12352    audio
      3   5:34.40   2:57.03   24940   13278    audio
      4   8:31.43   2:57.67   38218   13342    audio
      5  11:29.35   4:25.08   51560   19883    audio
      6  15:54.43   2:36.25   71443   11725    audio
      7  18:30.68   2:04.50   83168    9350    audio
      8  20:35.43   3:13.07   92518   14482    audio
      9  23:48.50   3:21.63  107000   15138    audio
     10  27:10.38   5:39.12  122138   25437    audio
     11  32:49.50   2:56.40  147575   13240    audio
      -  35:46.15         -  160815       - lead-out
so communication with the drive also seems to be working.

Perhaps a problem with the mixer settings?
  $ mixerctl -a
  outputs.master=129,129
  outputs.master.mute=off
  outputs.master2=129,129
  outputs.master2.mute=off
  inputs.beep=108,108
  inputs.reclvl=222,222
  inputs.reclvl.mute=off
  record.mic=0,0
  record.mic2=0,0
  inputs.reclvl2=0,0
  outputs.dacsel=DAC00,DAC02
  record.source=ADC01,ADC03
>How-To-Repeat:
cdplay play

and note ensuing silence
>Fix: