>Was this work done on data stored in lossy formats? You're right to mention this. Lossless audio is preferred for analyst software. Even good MP3s tend to top

>Was this work done on data stored in lossy formats? You're right to mention this. Lossless audio is preferred for analyst software. Even good MP3s tend to top out around 16kHz. The quality of the recording will also be dependent on the microphones used and their frequency range. When we have analysed animal sounds it's useful to play the sample slower, pitched down. Having those higher frequencies recorded well, above 16kHz, make a huge difference to the signals information.