Bob and list;

On Mon, Sep 26, 2016 at 3:04 PM, Bob Williams <li...@karmasailing.uk> wrote:

> On Mon, 26 Sep 2016 11:12:32 -0700
> chris hermansen <clherman...@gmail.com> wrote:
>
> > Bob, what connects your computer to your TEAC?  A USB cable?
> >
> Yes, a USB cable. I also have a sound card, but want to use the TEAC
> DAC.
>
> > What music player do you use?
> >
> MPD
>
> > What is the output of "aplay -L" in a terminal window?
>
> bob@hexagon:~> aplay -L
> null
>     Discard all samples (playback) or generate zero samples (capture)
> default
>     Default ALSA Output (currently PulseAudio Sound Server)
> sysdefault:CARD=D1
>     Xonar D1, Multichannel
>     Default Audio Device
> front:CARD=D1,DEV=0
>     Xonar D1, Multichannel
>     Front speakers
> surround21:CARD=D1,DEV=0
>     Xonar D1, Multichannel
>     2.1 Surround output to Front and Subwoofer speakers
> surround40:CARD=D1,DEV=0
>     Xonar D1, Multichannel
>     4.0 Surround output to Front and Rear speakers
> surround41:CARD=D1,DEV=0
>     Xonar D1, Multichannel
>     4.1 Surround output to Front, Rear and Subwoofer speakers
> surround50:CARD=D1,DEV=0
>     Xonar D1, Multichannel
>     5.0 Surround output to Front, Center and Rear speakers
> surround51:CARD=D1,DEV=0
>     Xonar D1, Multichannel
>     5.1 Surround output to Front, Center, Rear and Subwoofer speakers
> surround71:CARD=D1,DEV=0
>     Xonar D1, Multichannel
>     7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
> iec958:CARD=D1,DEV=0
>     Xonar D1, Multichannel
>     IEC958 (S/PDIF) Digital Audio Output
> sysdefault:CARD=DEVICE
>     TEAC USB AUDIO DEVICE, USB Audio
>     Default Audio Device
> front:CARD=DEVICE,DEV=0
>     TEAC USB AUDIO DEVICE, USB Audio
>     Front speakers
> surround21:CARD=DEVICE,DEV=0
>     TEAC USB AUDIO DEVICE, USB Audio
>     2.1 Surround output to Front and Subwoofer speakers
> surround40:CARD=DEVICE,DEV=0
>     TEAC USB AUDIO DEVICE, USB Audio
>     4.0 Surround output to Front and Rear speakers
> surround41:CARD=DEVICE,DEV=0
>     TEAC USB AUDIO DEVICE, USB Audio
>     4.1 Surround output to Front, Rear and Subwoofer speakers
> surround50:CARD=DEVICE,DEV=0
>     TEAC USB AUDIO DEVICE, USB Audio
>     5.0 Surround output to Front, Center and Rear speakers
> surround51:CARD=DEVICE,DEV=0
>     TEAC USB AUDIO DEVICE, USB Audio
>     5.1 Surround output to Front, Center, Rear and Subwoofer speakers
> surround71:CARD=DEVICE,DEV=0
>     TEAC USB AUDIO DEVICE, USB Audio
>     7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
> iec958:CARD=DEVICE,DEV=0
>     TEAC USB AUDIO DEVICE, USB Audio
>     IEC958 (S/PDIF) Digital Audio Output
>
>
I would take this step by step.

First you should use aplay to find out what works and what doesn't.  Find a
.wav file of representative music somewhere or create one (use
soundconverter for instance).

Run "aplay -l" to make sure that your TEAC card is card 1 (it looks as
though it is but check)

Then try playing the resulting .wav file with aplay through the TEAC, like
this:

aplay -D hw:1,0 mysong.wav

(this will play at full volume if it works so make sure you have your
volume turned way down)

If that doesn't work, try

aplay -D plughw:1,0 mysong.wav

Assuming one or the other of those works...

Second, is the TEAC dedicated to MPD's use, or will you want other programs
to use it (like VLC)?

Assuming it's dedicated, then I would configure MPD to talk directly to the
TEAC through ALSA, especially if you have music at varying bit rates and
you want to pass them through untouched.

I run two music servers in my house, both with MPD and dedicated DACs.  My
audio output stanza in my /etc/mpd.conf looks like this:

audio_output {
enabled         "yes"
type            "alsa"
name            "Schiit Bifrost"
device          "hw:2,0"
mixer_type      "disabled"
auto_resample   "no"
auto_channels   "no"
auto_format     "no"
dop             "no"
}

You would have to change the name and the device.

If the aplay experiments didn't work or you don't want to dedicate, then
get back to the list.


-- 
Chris Hermansen · clhermansen "at" gmail "dot" com

C'est ma façon de parler.
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