_save_wave_file: Use int16 type for sample #2
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When writing the audio sample, struct.pack() is used to convert the integer sample value into a byte like object. Using 'i' results in a 4 byte object, where as a 2 byte object is expected. As a result the waveform ends up being twice the required frequency, and so not valid DTMF tones. Use the 'h' formatter, so a int16 is generated. Signed-off-by: Andrew Lunn <[email protected]>
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When writing the audio sample, struct.pack() is used to convert the integer sample value into a byte like object. Using 'i' results in a 4 byte object, where as a 2 byte object is expected. As a result the waveform ends up being twice the required frequency, and so not valid DTMF tones.
Use the 'h' formatter, so a int16 is generated.