In the reference, it is displayed that negative values for the frequency parameter will play the audio in reverse, however that is not the case. Positive values from 0.1+ works, Negative values do not, at all.
Quick Reference:
Code Snippet (if applicable) to Reproduce Problem:
mob
Login()
play('intro.mid', freq=-1)
mob/proc/play(sf as file, freq=1)
var/sound/s = sound(sf)
s.frequency=freq
src<<s
Expected Results:
The audio file to played as indicated.
Actual Results:
For all positive values: Intended behaviour.
For all negative values: Lack of sound.