Hi Hin-Tak, I finally found out the reason! It is because there is a length limit of PCM name in ALSA conformance test. I have increased it on https://chromium-review.googlesource.com/c/chromiumos/platform/audiotest/+/1871792. Waiting for the review and merge. Thanks a lot for your catch! Best, Yu-Hsuan Hin-Tak Leung <htl10@xxxxxxxxxxxxxxxxxxxxx> 於 2019年10月21日 週一 下午9:57寫道： > > On Sunday, 20 October 2019, 11:51:42 BST, Yu-Hsuan Hsu <yuhsuan@xxxxxxxxxxxx> 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 > > > > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
