Audio functions can be called with REXX command files. The audio functions available are mciRxSendString(), mciRxInit(), mciRxExit(), mciRxGetError(), and mciRxGetDeviceID(). OS/2 multimedia provides examples of REXX command files; PLAY.CMD and RECORD.CMD demonstrate how to play and record audio files. Multimedia with REXX, an online reference provided with OS/2 multimedia, contains more detailed information on the REXX string interface.