[LAU] alsaplayer error using USB Audio DAC

Roger Weinheimer rweinheimer at yahoo.com
Sat Aug 10 01:42:25 UTC 2013

I meant to share this last night but sidetracked. These are the specs from the DAC packaging, fwiw. Does this help to address format/capabilities questions?


On Aug 9, 2013, at 5:12 AM, linux-audio-user-request at lists.linuxaudio.org wrote:

> Date: Thu, 8 Aug 2013 10:58:49 -0400
> From: Paul Davis <paul at linuxaudiosystems.com>
> To: len at ovenwerks.net
> Cc: Linux Audio Users <linux-audio-user at lists.linuxaudio.org>
> Subject: Re: [LAU] alsaplayer error using USB Audio DAC
> Message-ID:
> 	<CAFa_cKna20vy2MD=Ty=NBP=cdPn6oD9LPvDsCDT78Pg+8w7Piw at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
> On Thu, Aug 8, 2013 at 10:53 AM, Len Ovens <len at ovenwerks.net> wrote:
>> Generally for trouble shooting I would hit the card directly:
>> alsaplayer -i hw:1,0 filename.flac
>> aplay --device=hw:1,0 filename.flac
> aplay can't handle anything but straight PCM formats. in addition, using
> hw:XXX means that the requested data format MUST match the hardware
> capabilities. if you ask for a sample rate or channel count not supported
> by the hardware, the device configuration will fail. this is why the
> "default" device with ALSA is never hw:XXX but at minimum plughw:XXX (which
> can do just about any format conversion necessary).

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