arecord: main:828: audio open error: No such file or directory

[juggledad]

So I'm slowly making progress. I've downloaded a profile (en-us_pocketsphinx-cmu) and ran the training and that all worked. But when I try a test voice2json transcribe-stream I get an error:

pi@coronapi:~ $ voice2json transcribe-stream
arecord: main:828: audio open error: No such file or directory
Ready

I went and checked my microphone

pi@coronapi:~ $ arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: MV5 [Shure MV5], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
pi@coronapi:~ $ arecord -D hw:1,0 -d 5 -f cd test.wav -c 1
Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
arecord: set_params:1345: Channels count non available

but it wouldn't work with the -c 1 option. When I removed it, it recorded and played back fine.

pi@coronapi:~ $ arecord -D hw:1,0 -d 5 -f cd test.wav 
Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
pi@coronapi:~ $ aplay test.wav
Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

any thoughts?

[synesthesiam]

Try using arecord -L (capital L) and picking your microphone device where it says "Hardware device with all software conversions". That should allow for the right audio format to come right out of arecord.

[juggledad]

Thanks, that helps. When I used the record -L, at the end of a long output it showed

plughw:CARD=MV5,DEV=0
    Shure MV5, USB Audio
    Hardware device with all software conversions

however I still got the error:

pi@coronapi:~ $ arecord -D hw:MV5,0 -d 5 -f cd test.wav -c 1
Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
arecord: set_params:1345: Channels count non available

so I tried changing the -c option to -c 0 but then I discovered it will work if I use -c 2 so if I use arecord -D hw:MV5,0 -d 5 -f cd test.wav -c 2 or arecord -D hw:1,0 -d 5 -f cd test.wav -c 2 it will work.