====== DAC ======

  * [[http://r3dux.org/2013/12/how-to-enable-high-quality-audio-in-linux/|interesting]]

<code>
aplay -v -D plughw:1,0 test192.wav
</code>


<code>
aplay -l [-L]
</code>


<code>
flac -d 01-Wednesday\ Night\ Prayer\ Meeting.flac -c | aplay --device=hw:1,0
</code>

<code>
cat /proc/asound/card1/pcm0p/sub0/*
</code>

<code>
pacmd list-sinks
</code>

<code>
pactl list short sinks
</code>


<code>
for card in `aplay -L | grep "CARD=DAC"`; do echo ./hw_params $card; ./hw_params $card | grep Sample; sleep 1; done
</code>

===== E5 =====

<code>
cat /proc/asound/card3/stream0 
Creative Technology Ltd Sound Blaster E5 at usb-0000:02:00.0-1.1.2, high speed : USB Audio

Playback:
  Status: Stop
  Interface 1
    Altset 1
    Format: S24_3LE
    Channels: 2
    Endpoint: 1 OUT (ASYNC)
    Rates: 44100, 48000, 88200, 96000
    Data packet interval: 500 us
</code>

===== REGA =====

Usando il comando aplay -l identificare la scheda con SPDIF, ad esempio card1

Trovare il nome della scheda
<code>
cat /proc/asound/card1/id 
...
</code>

Creare ~/.asoundrc mettendo al posto di DAC il nome trovato nel punto precedente
<code>
pcm.DAC {
    type hw
    card "DAC"
}

ctl.!default {
    type hw
    card "DAC"
}

pcm.!default {
    type plug
    slave {
        pcm "DAC"
        rate "unchanged"
    }
}
</code>

suonare con
<code>
aplay file
</code>

verificare con
<code>
watch cat /proc/asound/card1/pcm3p/sub0/hw_params
</code>

<code>
Burr-Brown from TI USB Audio DAC at usb-0000:02:00.0-1.1.4.4, full speed : USB Audio

Playback:
  Status: Stop
  Interface 1
    Altset 1
    Format: S16_LE
    Channels: 2
    Endpoint: 2 OUT (ADAPTIVE)
    Rates: 32000, 44100, 48000
  Interface 1
    Altset 2
    Format: S16_LE
    Channels: 1
    Endpoint: 2 OUT (ADAPTIVE)
    Rates: 32000, 44100, 48000
</code>

===== hifiberry =====

==== rasberry ====

/boot/config.txt
<code>
dtparam=i2c_arm=on
#dtparam=audio=on
dtoverlay=hifiberry-digi
</code>

/etc/asound.conf
<code>
pcm.!default  {
 type hw card 0
}
ctl.!default {
 type hw card 0
}
</code>