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respeaker / get_started_with_respeaker

This is the wiki of ReSpeaker Core V2, ReSpeaker Core and ReSpeaker Mic Array.
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how to record single channel (mono) by the mic array? #163

Closed giggslam closed 7 years ago

giggslam commented 7 years ago

Hi all, i tried to use mic array in Raspberry pi, and connect Google cloud speech api. However, I found Google speech api only support mono sound (1 channel). I tried to record into mono, but not work.

arecord -v -D plughw:1 -f S16_LE -r 16000 -c 1 audio-1ch-16k.wav

Anyone can help? Thanks a lot!

xiongyihui commented 7 years ago

What's the output of the command?

susatenk commented 6 years ago

Hi! The same issue.

arecord -v -D plughw:1 -f S16_LE -r 16000 -c 1 audio-1ch-16k.wav During execution no errors, file generated OK but contains just silence, nothing captured.

arecord -v -D plughw:1 -f S16_LE -r 16000 -c 2 audio-2ch-16k.wav In case of two channels wav recorded fine.

My asound.conf: pcm.!default { type asym playback.pcm { type plug slave.pcm "hw:0,0" } capture.pcm { type plug slave.pcm "hw:1,0" } }

Any advice appreciated. I have dropped experiments with Respeaker Mic Array a year ago, almost immediately after buy, but recently decided to revive my home project. And stuck again on the same step.