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Cepstral playback is Choppy

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SYMPTOMS

  • Cepstral audio playback is choppy
  • Running app_swift with Asterisk 1.4
  • Asterisk >= 1.4.10

 

SOLUTION

Frame size changes in Asterisk >= 1.4.10 require modification to the app_swift source.  The following line in app_swift.c:

const int framesize = 160 * 4;

is changed to:

const int framesize = 20;

After saving the file changes, recompile and install the app_swift module (make clean, make install).  The audio quality should now be normal during playback using the Swift() Asterisk module.



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