Added "return -1" to blocks which used die();  Cleaned up.  Changed audio code to use independent record_audio and play_audio variables.
Added "return -1" to blocks which used die();  Cleaned up.  Changed audio code to use independent record_audio and play_audio variables.

RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix