diff --git a/firmware/baseband/dsp_modulate.cpp b/firmware/baseband/dsp_modulate.cpp
index cc9644bf..31dd3f85 100644
--- a/firmware/baseband/dsp_modulate.cpp
+++ b/firmware/baseband/dsp_modulate.cpp
@@ -62,8 +62,8 @@ void SSB::execute(const buffer_s16_t& audio, const buffer_c8_t& buffer) {
 				//default:	break;
 			//}
 
-			i *= 64.0f;
-			q *= 64.0f;
+			i *= 256.0f;   // Original 64.0f,  now x 4 (+12 dB's SSB BB modulation)	
+			q *= 256.0f;   // Original 64.0f,  now x 4 (+12 dB's SSB BB modulation)	
 			switch (mode) {
 				case Mode::LSB:	re = q;	im = i;	break;
 				case Mode::USB:	re = i;	im = q;	break;
@@ -123,9 +123,9 @@ void AM::execute(const buffer_s16_t& audio, const buffer_c8_t& buffer) {
 		}
 
 		q = sample / 32768.0f;
-		q *= 64.0f;
+		q *= 256.0f;										 // Original 64.0f,now x4 (+12 dB's BB_modulation in AM & DSB)	
 		switch (mode) {
-			case Mode::AM:	re = q + 20; im = q + 20; break;
+			case Mode::AM:	re = q + 80; im = q + 80; break; // Original DC add +20_DC_level=carrier,now x4 (+12dB's AM carrier)
 			case Mode::DSB:	re = q; im = q; break;
 			default:	break;
 		}