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#9 No sound output to ALSA device

v1.0_(example)
open
nobody
None
1
2019-05-31
2019-05-30
Jacek Ruzyczka
No

Apparently, libcdaudio has issues when directing the playback to an ALSA device: Even after setting volume to 255, my speakers remain silent. I've already excluded problems with ALSA or the sound card ('cause other sound sources like MP3 files are played without any problems). I don't get any related messages in /var/log/messages. See the output of strace cdcd play in the file attached.

This is my ALSA config:

pi@autoradio:~ $ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
dmixer
dsnooper
duplex
default
hw:CARD=sndrpijustboomd,DEV=0
    snd_rpi_justboom_dac, 
    Direct hardware device without any conversions
plughw:CARD=sndrpijustboomd,DEV=0
    snd_rpi_justboom_dac, 
    Hardware device with all software conversions

Some other user suspects libcdaudio to require an analog audio cable running from the CD drive to the sound card: Audio CD not working My CD drive is an external USB-based one.

Thank you for your help.

1 Attachments
strace_cdcd.log

Discussion

  • Jacek Ruzyczka

    Jacek Ruzyczka - 2019-05-30
    • Description has changed:

    Diff:

    --- old
+++ new
@@ -2,7 +2,8 @@

 This is my ALSA config:

-```
+
+~~~
 pi@autoradio:~ $ aplay -L
 null
     Discard all samples (playback) or generate zero samples (capture)
@@ -16,7 +17,8 @@
 plughw:CARD=sndrpijustboomd,DEV=0
     snd_rpi_justboom_dac, 
     Hardware device with all software conversions
- ```
+ 
+~~~

 Some other user suspects libcdaudio to require an analog audio cable running from the CD drive to the computer: [Audio CD not working](https://bbs.archlinux.org/viewtopic.php?id=44488) My CD drive is an external USB-based one.
     

  • Jacek Ruzyczka

    Jacek Ruzyczka - 2019-05-30
    • Description has changed:

    Diff:

    --- old
+++ new
@@ -20,6 +20,6 @@

 ~~~

-Some other user suspects libcdaudio to require an analog audio cable running from the CD drive to the computer: [Audio CD not working](https://bbs.archlinux.org/viewtopic.php?id=44488) My CD drive is an external USB-based one.
+Some other user suspects libcdaudio to require an analog audio cable running from the CD drive to the sound card: [Audio CD not working](https://bbs.archlinux.org/viewtopic.php?id=44488) My CD drive is an external USB-based one.

 Thank you for your help.
     

  • Jacek Ruzyczka

    Jacek Ruzyczka - 2019-05-30
    • Attachments has changed:

    Diff:

    --- old
+++ new
@@ -1 +0,0 @@
-strace_cdcd.log (0 Bytes; text/x-log)
     

  • Jacek Ruzyczka

    Jacek Ruzyczka - 2019-05-30
     

  • Jacek Ruzyczka

    Jacek Ruzyczka - 2019-05-30
    • Attachments has changed:

    Diff:

    --- old
+++ new
@@ -0,0 +1 @@
+strace_cdcd.log (25.3 kB; text/x-log)
     

  • Jacek Ruzyczka

    Jacek Ruzyczka - 2019-05-31

    What I've found out, is that no PLAYMSF command appears in the output of strace. I can't even find a child process spawned by cdcd. But the CD does spin in the drive.

     

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