diff --git a/src/fm95.c b/src/fm95.c
index 37e3534..ac9ee46 100644
--- a/src/fm95.c
+++ b/src/fm95.c
@@ -525,14 +525,14 @@ int main(int argc, char **argv) {
 			float mono = (ready_l + ready_r) / 2.0f;
 			audio = mono*MONO_VOLUME;
 			if(stereo) {
-				float stereo = (ready_l - ready_r) / 2.0f;
+				float stereo_signal = (ready_l - ready_r) / 2.0f;
 				float stereo_carrier = get_oscillator_sin_multiplier_ni(&osc, polar_stereo ? 1 : 8); // 31.25 or 38 KHz
 
-				if(polar_stereo) audio += ((stereo+0.2)*stereo_carrier)*STEREO_VOLUME;
+				if(polar_stereo) audio += ((stereo_signal+0.2)*stereo_carrier)*STEREO_VOLUME;
 				else {
 					float pilot = get_oscillator_sin_multiplier_ni(&osc, 4); // 19 KHz
 					mpx += pilot*PILOT_VOLUME;
-					audio += (stereo*stereo_carrier)*STEREO_VOLUME;
+					audio += (stereo_signal*stereo_carrier)*STEREO_VOLUME;
 				}
 			}
 			if(rds_on && polar_stereo == 0) {
@@ -545,7 +545,7 @@ int main(int argc, char **argv) {
 			}
 			if(mpx_on) mpx += hard_clip(current_mpx_in, 1.0f)*MPX_VOLUME;
 			if(sca_on) mpx += modulate_fm(&sca_mod, hard_clip(current_sca_in, sca_clipper_threshold))*SCA_VOLUME;
-			if(darc_on) mpx += hard_clip(refrenced_modulate_fm(&darc_modulator, last_darc_data, 16.0f)*compute_darc_amplitude(stereo*STEREO_VOLUME), 0.1f); // should never be over 10%
+			if(darc_on && polar_stereo == 0) mpx += hard_clip(refrenced_modulate_fm(&darc_modulator, last_darc_data, 16.0f)*compute_darc_amplitude(stereo*STEREO_VOLUME), 0.1f); // should never be over 10%, the docs say so
 
 			float mpx_only = measure_mpx(&mpx_only_power, mpx * mpx_deviation);
 			float mpower = measure_mpx(&power, (audio+mpx) * mpx_deviation); // Standard requires that the output is measured specifically
@@ -563,7 +563,7 @@ int main(int argc, char **argv) {
 			iirfilt_rrrf_execute(mpx_lpf, audio, &audio);
 
 			output[i] = (audio+mpx)*master_volume;
-			if(rds_on || stereo) advance_oscillator(&osc);
+			if(rds_on || stereo || darc_on) advance_oscillator(&osc);
 		}
 
 		if(write_PulseOutputDevice(&output_device, output, sizeof(output))) {