M_IN4_REC_R
emumix_set_volume(sc->card, M_IN4_REC_R, input[4] == 1 ? 100 : 0);
EFX_ROUTE(NULL, INP(IN_LINE1_R), M_IN4_REC_R, C_REC_R, 0);
EFX_ROUTE(NULL, INP(A_IN_LINE2_R), M_IN4_REC_R, C_REC_R, 0);