h6. [[SoundChannels]] h6(. » [[SoundChannels SWI Calls|SWI Calls]] h6((. » Sound_ReadControlBlock h2. Sound_ReadControlBlock h5. (SWI &4018B) |_<^{width:4em}. Entry | | | R0 |<^. Channel number (1 - 8)| | R1 |<^. Offset to read from (0 - 255)| |_<^{width:4em}. Exit | | |<^. R0 |<^. Preserved (or 0 if fail, invalid channel, or invalid read offset) | |<^. R1 |<^. Preserved | |<^. R2 |<^. 32-bit word read (if R0 non-zero on exit) | h4. Use Reads 32-bit data values from the [[Sound Channel Control Block]] (SCCB) for the designated channel. This call can be used to read parameters not catered for in the [[Sound_Control]] calls returned by Voice Generators, using an area of the [[Sound Channel Control Block|SCCB]] reserved for the programmer.