f1@xx,f2@xx,f3@xx;yy(on/off/tones)
f1 = 1st tone in Hz
f2 = 2st tone in Hz
f3 = 3st tone in Hz
xx = tone level in dB
yy = number of repetitions
on = duration in seconds, * means continuous (equivalent to 1 second)
off = duration in seconds
tones = tone to play
Example 1
400@-16,425@-16,450@-16;10(*/0/1+2 +3) – Australian Dial Tone
tone 1 is 400 Hz at -16 dB
tone 2 is 425 Hz at -16 dB
tone 3 is 450 Hz at -16 dB
play tones 1, 2 and 3 together, continuously (no off time)
repeat 10 times