How to compare two audio files ?

[Gale Andrews]

I am still not really clear why you need to check every call live, as opposed to something like Steve's suggestion to pre-check the system for noise and distortion.

You could certainly use Analyze > Silence Finder... in Audacity to check for silences at the noise level in the recorded files. Silences longer than say a couple of seconds could indicate dropouts or completely silent recordings. I am not sure if Silence Finder can be handled well in scripting. Silence Finder writes labels, so if no labels are produced (which displays a warning), that indicates a positive test result.

How long are the calls? Analyze > Sample Data Export... writes text files containing sample levels but is limited to 1 million audio samples. You could write a script to check the text files for long stretches of audio below a threshold as another way to do a check for dropouts.


Gale

[ansnum]

Hi,

I have the same need. have you found a solution ?

[steve]

I have the same need. have you found a solution ?

I described the approach that I would take in this post: http://forum.audacityteam.org/viewtopic ... 53#p261553
As there was no further comment from Kris I assume that answer was satisfactory.

[Mahender]

Hello ,

I am working on similar scenario. Did find any way to compare audio files?

[steve]

I am working on similar scenario. Did find any way to compare audio files?

Your question is too vague to give a precise answer (like asking: "How to compare two things").

With Audacity you can easily compare:

• Length of the audio
• Peak level
• RMS level
• Frequency bandwidth
• Sample rate

If you are working with generated test tones, you can also compare

• Frequency
• Wave shape
• Harmonic content