---------- Forwarded message ---------
De: Marcelo Pedro <marcelo.pedro@rute.ai>
Date: seg., 16 de mar. de 2020 às 20:43
Subject: help with arecord on raspberry pi 4 model B
To: <People-request@lists.audioinjector.net>

When I try to record using Audio Injector Zero card with rate of 8000 hz using "arecord -r 8000" , I get this message on terminal:

Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
arecord: set_params:1403: Unable to install hw params:
ACCESS: RW_INTERLEAVED
FORMAT: U8
SUBFORMAT: STD
SAMPLE_BITS: 8
FRAME_BITS: 8
CHANNELS: 1
RATE: 8000
PERIOD_TIME: 125000
PERIOD_SIZE: 1000
PERIOD_BYTES: 1000
PERIODS: 4
BUFFER_TIME: 500000
BUFFER_SIZE: 4000
BUFFER_BYTES: 4000
TICK_TIME: 0

Even knowing that I can record on this rate, because of this command "arecord -D hw:0,0 --dump-hw-params", getting this message:

Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
HW Params of device "hw:0,0":
--------------------
ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED
FORMAT: S16_LE S24_LE S32_LE
SUBFORMAT: STD
SAMPLE_BITS: [16 32]
FRAME_BITS: [32 64]
CHANNELS: 2
RATE: [8000 96000]
PERIOD_TIME: (333 8192000]
PERIOD_SIZE: [32 65536]
PERIOD_BYTES: [256 524288]
PERIODS: [2 4096]
BUFFER_TIME: (666 16384000]
BUFFER_SIZE: [64 131072]
BUFFER_BYTES: [256 524288]
TICK_TIME: ALL
--------------------
arecord: set_params:1339: Sample format non available
Available formats:
- S16_LE
- S24_LE
- S32_LE

I'm using raspberry pi 4 model B and Raspbian buster with kernel version 4.19.108-v7l+. Could someone help me please