Re: [Alsa-user] Dmix plugin on raspberry pi & WM8731 DAC

2014-05-14 Thread Clemens Ladisch
Jakob Hansen wrote: > So the following is from Wolfson's own webpage for the wm8731: > "Digital audio input word lengths from 16-32 bits and sampling rates > from 8kHz to 96kHz are supported. " > But, > > Card 1, ID `sndrpiproto', name `snd_rpi_proto' > Device 0, ID `WM8731 HiFi wm8731-hifi-0', n

Re: [Alsa-user] Dmix plugin on raspberry pi & WM8731 DAC

2014-05-14 Thread Clemens Ladisch
Jakob Hansen wrote: > I have noticed a distinct degradation in audio quality when using the > Master Playback volume control in amixer. Is this an artifact of > truncation being done in the hardware Maybe; this happens if you attenuate 16-bit samples too much. Is that mixer control implemented in

[Alsa-user] Dmix plugin on raspberry pi & WM8731 DAC

2014-05-13 Thread Jakob Hansen
Hello, I am running raspbian with alsalib version 1.0.25 and driver version k3.8.10+. The kernel is compiled according to the instructions here: http://blog.koalo.de/2013/05/i2s-support-for-raspberry-pi.html. Since the wm8731 does not support hardware mixing, I am using the dmix plugin, but I have