Symbol: SV_IREG_MPU401
sound/pci/sonicvibes.c
1290
snd_sonicvibes_out(sonic, SV_IREG_MPU401, sonic->mpu_switch = 0x05); /* MPU-401 switch */
sound/pci/sonicvibes.c
1328
SONICVIBES_SINGLE("SonicVibes Onboard Synth", 0, SV_IREG_MPU401, 0, 1, 0),
sound/pci/sonicvibes.c
1329
SONICVIBES_SINGLE("SonicVibes External Rx to Synth", 0, SV_IREG_MPU401, 1, 1, 0),
sound/pci/sonicvibes.c
1330
SONICVIBES_SINGLE("SonicVibes External Tx", 0, SV_IREG_MPU401, 2, 1, 0)