Check soundcard settings: bitrate

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To check settings for UCA202:

# cat /proc/asound/CODEC/pcm0p/sub0/hw_params
# cat /proc/asound/card0/codec#0 
access: MMAP_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2 <-------- will be 4 for iO4
rate: 48000 (48000/1) <------ this changes with the input audio file
period_size: 44100
buffer_size: 88200