adjust_sample - Alters the parameters of a sample while it is playing. Allegro game programming library.

       Alters  the  parameters  of a sample while it is playing (useful for manipulating looped sounds). You can
       alter the volume, pan, and frequency, and can also clear the loop flag, which will stop the  sample  when
       it  next  reaches the end of its loop. The values of the parameters are just like those of play_sample().
       If there are several copies of the same sample playing, this will adjust the first one it  comes  across.
       If the sample is not playing it has no effect.

       adjust_sample - Alters the parameters of a sample while it is playing. Allegro game programming library.

play_sample(3alleg4), exsample(3alleg4)

Allegro                                           version 4.4.3                           adjust_sample(3alleg4)

#include<allegro.h>voidadjust_sample(constSAMPLE*spl,intvol,intpan,intfreq,intloop);