When given a surveillance video with audio, recorded in the 6 hour mode by a Sylvania surveillance camera, I was confronted by audio extremely compressed into high pitched "chipmunk" sound. The video is unimportant-the audio is the point. I extracted the audio from the video in Premier Pro and placed it into Audition 2.0, stretched it under "Time and Pitch" by a ratio of 300 and clicked on "resample", and then amplified the wave with a 20dB boost. I can now actually hear and understand some of the conversations. However, the speech seems to be in a tin can or a chamber, and I need to make it much clearer. This same problem also occurs sometime when I take a sample of a wave for noise reduction. The audio becomes clearer, but is in a echoey kind of chamber. How can I clear up my surveillance audio??

Just a thought. Maybe it was recorded at a different bit depth than what you think?
eg recorded at 48k and being played back at 44.1k?

Hello Runaway,

Maybe it was recorded at a different bit depth than what you think? Bit
depth would be, for example, 16 bits, 24 bits or 32 bits, not 48kHz or
44.1Khz, which are sample rates.





eg recorded at 48k and being played back at 44.1k? If it was recorded
at 48kHz and replayed at 44.1kHz, it would play slower not faster!





Regards,

Dave.

Don't ya hate that - just when you think all those numbers start to make sense ... :-)

Thanks Dave I sit corrected - I knew what I meant its just that none of the words I used and how I used them made any logical sense at all :-)