Macintosh sound files

A way for storing a Sound object on disk.

File format

The double-clickable sound file of the Macintosh (8 bits per sample). Cannot be ported to other machines, because the sound is in the resource fork.


With Read from file....

To read a Sound from a Macintosh sound file on disk, use Read from file... (Macintosh only).

The 8-bit sample values are divided by 128 so that the amplitude of the resulting Sound is between –1.0 and +1.0.

The resulting Sound will appear in the list of objects; its name will be equal to the file name, without extension.


With Save as Mac sound file.... Praat asks you for a file name. After you click OK, 0.5 is added to the samples of the Sound, they are multiplied by 128 and quantized between 0 and 255; the result is written to the file in 8-bit linear Macintosh sound-file format.

To avoid clipping, keep the absolute amplitude below 1.000. If the maximum sound pressure level is 91 dB (top = 127), the quantization threshold for a sine wave is (top = 1/2) 43 dB.

© ppgb, January 31, 2011