To evaluate the effect of MP3 conversion on an audio file, I would like to find software will produce a WAV file that is the difference between the best match between two sample WAV files.
If File1.WAV is the original, and is converted to File2.MP3 and then reconverted to File3.WAV, the difference between File1.WAV and File3.WAV (= file4.WAV) should reveal the sound lost (or added) in compression, provided that one can match the sync and levels appropriately.
A spectral analysis of the resultant differential file4.WAV could then be used to display the artifacts of compression as a function of time and frequency for various compression parameters. This could be done for other lossy compression algorithms as well.
Appropriate matching of amplitude level and sync is fairly critical to the evaluation and not straightforward. It may be necessary to add a calibration segment to do this effectively.
Does anyone know of software that is available to evaluate 2 WAV files by first optimally matching the amplitude level and sync and then produce a differential WAV file?
To evaluate the effect of MP3 conversion on an audio file, I would like to find software will produce a WAV file that is the difference between the best match between two sample WAV files.
If File1.WAV is the original, and is converted to File2.MP3 and then reconverted to File3.WAV, the difference between File1.WAV and File3.WAV (= file4.WAV) should reveal the sound lost (or added) in compression, provided that one can match the sync and levels appropriately.
A spectral analysis of the resultant differential file4.WAV could then be used to display the artifacts of compression as a function of time and frequency for various compression parameters. This could be done for other lossy compression algorithms as well.
Appropriate matching of amplitude level and sync is fairly critical to the evaluation and not straightforward. It may be necessary to add a calibration segment to do this effectively.
Does anyone know of software that is available to evaluate 2 WAV files by first optimally matching the amplitude level and sync and then produce a differential WAV file?