On Sunday, 20 October 2019, 11:51:42 BST, Yu-Hsuan Hsu yuhsuan@chromium.org wrote:
Hi Hin-Tak, Maybe it is not the correct pcm name. I guess the correct one is "hw:seeed8micvoicec,0". Could you try it? By the way, you can also use aplay -D {device_name} to make sure whether the name is correct or not.
Best, Yu-Hsuan
Dear Yu-Hsuan,
No "hw:seeed8micvoicec,0" did not work as input to the conformance test. As input to 'aplay -D', both the ,0 and without it sort of works. (it waits for input from stdin).
When I actually gave it an channel file to play, both forms ('aplay -D hw:CARD=seeed8micvoicec ...' and 'aplay -D hw:CARD=seeed8micvoicec,0 ...') stopped with:
Playing WAVE 'Untitled recording 2019-10-11 19.15.11.wav' : Signed 16 bit Little Endian, Rate 16000 Hz, Channels 6 aplay: set_params:1339: Sample format non available Available formats: - S32_LE
The interesting part of 'aplay -L' is (there is another device):
sysdefault:CARD=seeed8micvoicec seeed-8mic-voicecard, Default Audio Device dmix:CARD=seeed8micvoicec,DEV=0 seeed-8mic-voicecard, Direct sample mixing device dsnoop:CARD=seeed8micvoicec,DEV=0 seeed-8mic-voicecard, Direct sample snooping device hw:CARD=seeed8micvoicec,DEV=0 seeed-8mic-voicecard, Direct hardware device without any conversions plughw:CARD=seeed8micvoicec,DEV=0 seeed-8mic-voicecard, Hardware device with all software conversions usbstream:CARD=seeed8micvoicec seeed-8mic-voicecard USB Stream Output
As I mentioned at the beginning, 'arecord -L' and running the conformance test in CAPTURE mode using 'hw:CARD=seeed8micvoicec' works. It is PLAYBACK which does not.
Regards, Hin-Tak