h6. [[SoundChannels]] h6(. » [[SoundChannels SWI Calls|SWI Calls]] h6((. » Sound_ControlPacked h2. Sound_ControlPacked h5. (SWI &40186) |_<^{width:4em}. Entry | | | R0 |<^. AAAACCCC (Amplitude / Channel)| | R1 |<^. DDDDPPPP (Duration / Pitch)| |_<^{width:4em}. Exit | | |<^. R0, R1 |<^. Preserved | h4. Use This call is identical to [[Sound_Control]], but the parameters are packed 16-bit at a time into low R0, high R0, low R1, high R1 respectively. It is provided for BBC compatibility and for the use of the Scheduler. The [[Sound_Control]] call should be used in preference where possible.