Hey!
I tested the latest 48Khz firmwares and did not ear any changes.
Here is the file I’m playing (loop-test.wav) and the record from the playback channel of the ReSpeaker (mic.wav) with the 48khz_6channels_firmware.
Please download files here (too big for forum quota): <LINK_TEXT text=“https://wetransfer.com/downloads/ce1c7d … 000/3d4116”>https://wetransfer.com/downloads/ce1c7dbb71f48565f5b2413d16785a6820190701150000/da19f88edf3f680a2ad313c251775cb620190701150000/3d4116</LINK_TEXT>
I’m on a Raspberry Pi 3B+ with the latest Raspbian Stretch OS (fully updated).
Here is the verbose aplay output: aplay -Dplughw:ArrayUAC10 loop-test.wav -vv
Playing WAVE ‘loop-test.wav’ : Signed 24 bit Little Endian in 3bytes, Rate 48000 Hz, Stereo
Plug PCM: Hardware PCM card 1 ‘ReSpeaker 4 Mic Array (UAC1.0)’ device 0 subdevice 0
Its setup is:
stream : PLAYBACK
access : RW_INTERLEAVED
format : S24_3LE
subformat : STD
channels : 2
rate : 48000
exact rate : 48000 (48000/1)
msbits : 24
buffer_size : 24000
period_size : 6000
period_time : 125000
tstamp_mode : NONE
tstamp_type : MONOTONIC
period_step : 1
avail_min : 6000
period_event : 0
start_threshold : 24000
stop_threshold : 24000
silence_threshold: 0
silence_size : 0
boundary : 1572864000
appl_ptr : 0
hw_ptr : 0
Hope this helps. Tell me if you need more info.
Thanks for your help 