Disable ALSA’s Dynamic Audio Power Management (DAPM) in piCorePlayer?

[Mostmax]

Does anyone know how to disable ALSA’s Dynamic Audio Power Management (DAPM) in piCorePlayer?

I found instructions for how to do so in Raspotify - create a file called snd_soc_core.conf in /etc/modprobe.d with this line in it:
options snd_soc_core pmdown_time -1

I tried this in piCore via ssh with vi and nano but the file doesn’t remain after reboot (I’m a Linux novice so I could be missing an obvious step and messing this up).

I’m trying to solve an issue with using an XtremPro X1 DAC with a Raspberry Pi (Zero W or 3b+): a few moments after audio stops playing, whining noises start up. They stop immediately when another file starts.

Not sure if disabling DAPM will solve this, but I read it can sort out similar noise issues with Raspotify and figured it was worth a shot.

 

[Promit]

No ideas but good luck and let us know how you do. I never much cared for the Windows audio stack (sorry Amir) but it's a dream compared to the misery of working with ALSA.

 

[tw99]

No direct answer but try asking here:

https://forums.slimdevices.com/showthread.php?111787-ANNOUNCE-piCorePlayer-6-0-0/

 

[Mostmax]

The solution turned out to be much simpler. I upgraded to pCP v. 6.0.0 and set the ALSA volume control to PCM. Ironed the problem right out.

 

[somebodyelse]

I tried this in piCore via ssh with vi and nano but the file doesn’t remain after reboot (I’m a Linux novice so I could be missing an obvious step and messing this up).

It wouldn't be obvious even to experienced linux users, so don't feel bad. It's built using TinyCoreLinux, and getting things to survive a reboot is different to pretty much any other linux variety. I'd suggest making a feature request in the forum above if you think it can be useful to people.

 

[Audiorick]

Newbie question. I use Ropieee and Dynamic Audio Power Management is turned off on all my endpoints. What does it do?