Compatible bit rates

[vondeckerstein]

So far with three different USB input devices(one USB microphone, two USB soundcards) I am unable to get jasper to work. I have confirmed in the python interpreter (with a pyaudio instance) that each device supports a bitrate of 44100 or 48000, but not the jasper default 16000.

Running it without editing mic.py causes an error:
File "/usr/lib/pymodules/python2.7/pyaudio.py", line 714, in open
stream = Stream(self, _args, *_kwargs)
File "/usr/lib/pymodules/python2.7/pyaudio.py", line 396, in init
self._stream = pa.open(**arguments)
IOError: [Errno Invalid sample rate] -9997

Increasing the rate in mic.py to 48000(and the chunk to 4096) causes an error:
File "/home/pi/jasper/client/mic.py", line 117, in passiveListen
data = stream.read(CHUNK)
File "/usr/lib/pymodules/python2.7/pyaudio.py", line 564, in read
return pa.read_stream(self._stream, num_frames)
IOError: [Errno Input overflowed] -9981

out of the three devices, one defaults to 48000 so i suspect it should work. what am i doing wrong?

[Holzhaus]

Can you please run Jasper with --debug and post the complete output?

[vondeckerstein]

I ended up getting it working late last night, by adding ' input_device_index=3, ' to each instance in mic.py where the stream is opened.

For what it's worth, I made a list of devices available to pyaudio:
0:USB PnP Sound Device: USB Audio (hw:0,0)
3:sysdefault
7:spdif
9:default

I'm not sure what 'sysdefault' is but it listed that it could handle up to 128 input devices, so i'm guessing something in software. Might be an option for others who can't get it to work on multiple devices.

Thanks anyway!

[Holzhaus]

Thanks to #247 (which was merged into the v2.0 dev branch), audio devices will soon be configurable. Closing.