h6. [[SoundChannels]] h6(. » [[SoundChannels SWI Calls|SWI Calls]] h6((. » [[Sound_InstallVoice]] h6(((. » Sound_InstallVoice 0,0 h2. Sound_InstallVoice h5. (SWI &40183) |_<^{width:4em}. Entry | | |<^. R0 |<^. 0 | |<^. R1 |<^. 0 | |_<^{width:4em}. Exit | | |<^. R0 |<^. 0, or null terminated error string if R1 = 0| |<^. R1 |<^. Index of first free voice handle (1-32), or 0 on error | h4. Use This call can be used to locate the first free voice slot. h4. Notes If an error occurs, this SWI does not set V in the usual manner. Instead R1 is zero on exit, and R0 points directly to a null-terminated error string. h4. See also * [[Sound_InstallVoice]]