pi@raspberrypi:~ $ arecord -v --dump-hw-params -fdat -d1 -Dhw:memsmic /dev/null
Recording WAVE '/dev/null' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
HW Params of device "hw:memsmic":
--------------------
ACCESS:  RW_INTERLEAVED
FORMAT:  S24_LE S32_LE
SUBFORMAT:  STD
SAMPLE_BITS: 32
FRAME_BITS: 64
CHANNELS: 2
RATE: [8000 48000]
PERIOD_TIME: (83 4096000]
PERIOD_SIZE: [4 32768]
PERIOD_BYTES: [32 262144]
PERIODS: [2 255]
BUFFER_TIME: (166 8192000]
BUFFER_SIZE: [8 65536]
BUFFER_BYTES: [64 524288]
TICK_TIME: ALL
--------------------
arecord: set_params:1233: Sample format non available
Available formats:
- S24_LE
- S32_LE