mono_to_stereo    691 sound/pci/echoaudio/echoaudio.c 	format.mono_to_stereo = 0;
mono_to_stereo    325 sound/pci/echoaudio/echoaudio.h 	char mono_to_stereo;		/* Only used if interleave is 1 and
mono_to_stereo    817 sound/pci/echoaudio/echoaudio_dsp.c 		   format->bits_per_sample == 32 && !format->mono_to_stereo) {