This value is an old value and has been replaced by "Recorder" ! The parameter decides which audio card you are using. Therefore it should be in the local registry. If you select PCXNP the NP recorder "REC_NP.OCX" is used, if you select Soundblaster, the Recorder "REC_MM.OCX" is used instead of "REC_X.OCX". "Playback" can be appended if recordings must not be possible.
Possible values: NONE, PCX, PCXPlayback, PCXNP, PCXNPPlayback, Soundblaster, SoundblasterPlayback
Default value: