set the appropriate SampleRate for caed with an AES/BU USB Audio Card

[hoccau]

Hi,

I have a YellowTech PUC2 audio card, which have an AES/BU output. Rivendell was unable to plug directly to Alsa (with the RdAlsaConfig generated one), because the sample depth is 24bits (not 16 nor 32). So, I have filled /etc/asound.conf with a "plug" alsa plugin :

pcm.hw0 {
type hw
card PUC2
device 0
}
ctl.hw0 {
type hw
card PUC2
}
pcm.rd0 {
type plug
slave {
pcm hw0
}
}
ctl.rd0 {
type hw
card PUC2
}

It's working well when i test it with aplay -vD rd0 sound.wav
caed start correctly, but with an approximate sample rate :

caed: Starting ALSA Play Device rd0:
caed: Format = 32 bit little-endian
caed: SampleRate = 47999
caed: Aggregate Channels = 48
caed: Periods = 4
caed: BufferSize = 4096 frames
caed: Device started successfully
caed: Starting ALSA Capture Device rd0:
caed: Format = 32 bit little-endian
caed: SampleRate = 47998
caed: Aggregate Channels = 48
caed: Periods = 4
caed: BufferSize = 4096 frames
caed: Device started successfully

It is sometimes 48001, but never 48000 (which is well configurated in rdadmin). I am not sure to understand everything but, the samplerate is voluntarily approximated ?
With RDAirPlay i can hear 1 seconde of sound, then a big white noise.
Or there is a better way to configure caed and/or alsa for an AES/BU output with Rivendell ?

Thx in advance!

[ElvishArtisan]

Try adding an explicit rate statement to the pcm stanzas, something like:

pcm.hw0 {
type hw
card PUC2
device 0
rate 48000
}