DAC

• interesting

aplay -v -D plughw:1,0 test192.wav

aplay -l [-L]

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

cat /proc/asound/card1/pcm0p/sub0/*

pacmd list-sinks

pactl list short sinks

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

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

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

Trovare il nome della scheda

cat /proc/asound/card1/id 
...

Creare ~/.asoundrc mettendo al posto di DAC il nome trovato nel punto precedente

pcm.DAC {
    type hw
    card "DAC"
}

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

pcm.!default {
    type plug
    slave {
        pcm "DAC"
        rate "unchanged"
    }
}

suonare con

aplay file

verificare con

watch cat /proc/asound/card1/pcm3p/sub0/hw_params

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

/boot/config.txt

dtparam=i2c_arm=on
#dtparam=audio=on
dtoverlay=hifiberry-digi

/etc/asound.conf

pcm.!default  {
 type hw card 0
}
ctl.!default {
 type hw card 0
}