int error = SetChannelAttributes(APTR handle, APTR chandle, struct hwTagList *tags);
iDatamember of this tag item. Volumes are specified in the range of 0 (mute) to 64 (full volume).
iDatamember of this tag item. Panning values range from 0 (left speaker only) to 255 (right speaker only). The default panning is 128 which means centered audio output.
iDatamember of this tag item. The pitch value specifies the number of PCM frames that are to be played per second.