9 Mar
2020
9 Mar
'20
6:10 p.m.
+SectionPCMCapabilities."DMIC-Capture" {
- formats "S16_LE"
- rates "48000"
- channels_min "2"
- channels_max "2"
- sig_bits "16"
+}
NHLT reports 4 microphones on a number of devices, is there any specific reason to limit the capture to 2ch?
I believe the generic Hdaudio card now reports the number of channels to pulseaudio, so it's possible that PulseAudio would open a 4ch stream but be told sorry no can do by topology.
FWIW we ended-up selecting different topology files in SOF, depending on whether we had 0, 2 or 4 mics.