These days most computers struggle to play WAV files recorded by the Witness Contactstore. Probably the easiest way to make these files play is to use ffmpeg to convert them as follows: ffmpeg -acodec g726 -i original_file.wav -f wav out_file.wav The converted WAV should play fine now on most operating systems.

The music file has to be A-law or U-law or G.711 at 8 khz, 8 Bits, Mono. To do this you can either use sox or ffmpeg. To use sox: sox -V input_file.wav -A -c 1 -r 8k -1 output.wav``` Update: Seems some of these options are depreciated, if you run sox with the previous options you get: sox WARN sox: Option -A' is deprecated, use -e a-law' instead. sox WARN sox: Option -1' is deprecated, use -b 8' instead.

Type in: *#0000# Of course you do…