Re: [alsa-devel] ALC1150 can't playback SND_PCM_FORMAT_FLOAT without dmix

Hi,

On 05/04/2014 09:27 AM, Madura Anushanga wrote:

MSI z87-GD65 GAMING motherboard's ALC1150 plays SND_PCM_FORMAT_FLOAT with noise[1] other non float formats work well. As soon as I changed /etc/asound.conf from

pcm.!default{ type hw card 1 }

The 'hw' plugin requires the audio hardward to support the configured format natively, matching the exact sample format, alignment and endianess, as well as the sample rate and channel number etc.

I don't know of any consumer-class Codec that supports float on the hardware wire.

pcm.dmixed { type asym playback.pcm { type dmix

...

1. https://github.com/manushanga/vrok/blob/master/outs/alsa.cpp

In general, you should use the 'plughw' plugin for generic applications, which does the implicit sample format conversion for you.

Daniel