Problems with audio: how to debug?

[stefanoco]

I'm unable to make the audio generation work properly, and can't understand how to debug. Installed TeleFrame on a Raspberry using the provided script, auto-run with PM2. Is any log file available in this configuration?

[LukeSkywalker92]

You can run pm2 logs TeleFrame to see the logs.

[stefanoco]

Thanks, and in case someone else follows this discussion (with limited knowledge of PM2 as myself): if you installed TeleFrame with the provided script on a Raspberry the logs are reached with pm2 logs TeleFrame as pi user, not root or sudo.

[LukeSkywalker92]

Could you fix your audio problems?

[stefanoco]

Not yet I'm trying now

[stefanoco]

...ok solved was as simple as an audio peripheral not being recognized/used by Alsa. How to debug on a Raspberry, TeleFrame installed with the script:

• look at TeleFrame logs by pm2 logs TeleFrame (as pi user) while recording an audio message (reveals problems with Alsa)
• look at system logs by sudo tail -f /var/log/syslog while unplugging/plugging an audio peripheral on USB (reveals problems recognizing the peripheral)
• google "raspberry usb audio ..." and the shown error

In my case in the end I solved by modifying two lines on /usr/share/alsa/alsa.conf:

defaults.ctl.card 1
defaults.pcm.card 1