SWHear: input_device_index not used in stream_start

[TimeTravel-0]

In SWHear.py, there is possibility to set the device by id in constructor/init. This id is verified (valid_input_devices function). Actually half of this class deals with selecting the right audio source. Finally, in stream_start, the following parameter to self.p.open() is missing:

input_device_index=self.device

...leading to opening the default (?) audio device, not the one specified.

So I suggest the following change in swhear.py:

replace self.stream=self.p.open(format=pyaudio.paInt16,channels=1, rate=self.rate,input=True,frames_per_buffer=self.chunk)
with self.stream=self.p.open(format=pyaudio.paInt16,channels=1, rate=self.rate,input=True,frames_per_buffer=self.chunk, input_device_index=self.device)
in line 146ff.

Btw. thanks for providing the audio/fft/graph sample. It is a nice starting point for visualizing the data captured by my "analog accelerometer connected to usb sound card" setup

[swharden]

@TimeTravel-0 Thanks for bringing this to my attention! (albeit delayed attention)

To restate the problem, the sound card test function opens the stream using input_device_index:

Python-GUI-examples/2016-07-37_qt_audio_monitor/SWHear.py

Lines 63 to 65 in c8dd034

	stream=self.p.open(format=pyaudio.paInt16,channels=1,
	input_device_index=device,frames_per_buffer=self.chunk,
	rate=int(self.info["defaultSampleRate"]),input=True)

... but when the card is actually opened for the main program, input_device_index is not defined:

Python-GUI-examples/2016-07-37_qt_audio_monitor/SWHear.py

Lines 146 to 147 in c8dd034

	self.stream=self.p.open(format=pyaudio.paInt16,channels=1,
	rate=self.rate,input=True,frames_per_buffer=self.chunk)

I'm about to rewrite this file, so when I do I will fix this issue by using a method to open the stream which returns the stream itself. This way there will only be one open() line in the program. I'll close this ticket when it's resolved.