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Re: resampling ultrasound on Mac

Subject: Re: resampling ultrasound on Mac
From: Raimund Specht <>
Date: Fri, 20 Dec 2002 12:46:14 -0800
the Mac too), that allow to import binary data and to resample soundfiles.
 However, because these applications were designed for standard soundcards,
 most of them limit the maximum sampling frequency, that can be processed to
 100 or 192 kHz. One workaround for this problem would be to time-expand the
 recordings (e.g. by setting the sampling rate attribute of the file header
 to 35.0 kHz). These programs would then allow to resample the recordings to
 31.25 kHz. You could then import the resampled files into your own
 application (knowing implicitly, that the original sampling rate of
 350 kHz has been transformed to 312.5 kHz).
 Avisoft-SASLab Pro is a PC software specifically designed for animal sound
 analysis, that has an integrated resampling feature (command
 Edit/Format/Sampling Frequency Conversion...). The maximum sampling
 frequency supported is 1 MHz and there are many useful features for bat call
 analysis (and synthesis). It also supports importing binary data and
 processing the standard Apple sound file format (.aif). SASLab Pro can be
 operated on the Mac with the VirtualPC emulation software.
 Raimund Specht
 Avisoft Bioacoustics
 Hauptstr. 52
 13158 Berlin
 phone/fax : +49 30 9163758

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