Ok testing that the hifiberry Amp+ works . . .
so over an ssh -X root@192.168.1.12 ( the address of My particular zynthian )
aplay /zynthian/zynthian-data/soundfonts/sfz/Drums/SalamanderDrumkit/OH/cowbell_MP_3 .wav
aplay: main:722: audio open error: Device or resource busy
So… we do have alsa because aplay -l sees the card.
But jack has grabbed the card to do good stuff so we want to turn that off. . .
qjackctl & ( this works cos you did the -X on ssh )
and stop jack . . . . on the interface …
But still resource busy . . .
Lets see what is using the snd . . .
lsof | grep snd
(lsof lists open files you might well need apt-get install lsof )
( | is a pipe the output of the first command is stuffed straight into the next command)
( which i grep… grep searches for text in this case the letters snd )
and gives …
jackd 383 root mem CHR 116,16 8604 /dev/snd/pcmC0D0p
jackd 383 root 10u CHR 116,0 0t0 8603 /dev/snd/controlC0
jackd 383 root 12u CHR 116,16 0t0 8604 /dev/snd/pcmC0D0p
jackd is still runinng . .
So lets be nasty . . .
killall -9 jackd
aplay /zynthian/zynthian-data/soundfonts/sfz/Drums/SalamanderDrumkit/OH/cowbell_MP_3 .wav
JUST THE RIGHT AMOUNT OF COWBELL !!!
SUCCESS !!