Multiroom / power on-off amp

[Tim Curtis]

Use the commands below to check ALSA output for "closed"

Sender

Code:

# Not playing
pi@trx:~ $ cat /proc/asound/card2/pcm0p/sub0/hw_params
closed

# Playing
pi@trx:~ $ cat /proc/asound/card2/pcm0p/sub0/hw_params
access: MMAP_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 48000 (48000/1)
period_size: 4096
buffer_size: 16384

Receiver

Code:

# Playing
pi@sig:~ $ moodeutl --hwparams
closed

# Not playing
pi@sig:~ $ moodeutl --hwparams
access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 48000 (48000/1)
period_size: 241
buffer_size: 6144

Note that currently the moodeutl --hwparams command does not work for Multiroom sender. I'll fix that for upcoming 8.3.8 release.