Playback rate clipped

[tim]

The Java platform on which Raven runs is different on Windows and Mac operating systems. On Windows, the maximum playback rate, which you get by multiplying the file's sample rate by the rate multiplier in the Raven tool bar, is 200 kHz. On Mac OS X, the maximum playback rate is 64 kHz so we play the audio at that rate if the playback rate is above that number. That's why the audio is slowed down. We're working on a workaround to this limitation where we will resample the audio to change the sample rate and allow us to play the audio at the requested rate. This will result in being able to hear lower sounds from the recordings but not the higher sounds that are not able to be played by the underlying operating system. In a 96 kHz recording, your spectrogram will show frequencies up through 48 kHz, but Raven will only play the lowest 24 kHz due to the way that we plan to resample the recordings (by dividing by powers of 2).

Tim