diff --git a/src/synth.c b/src/synth.c
index c6e7b775..6031d997 100644
--- a/src/synth.c
+++ b/src/synth.c
@@ -102,33 +102,6 @@ void synth_pitch(u8 channel, u8 octave, u16 freqNumber)
     updateOctaveAndFrequency(channel);
 }
 
-void synth_totalLevel(u8 channel, u8 totalLevel)
-{
-    const u8 REG_TOTAL_LEVEL = 0x40;
-    Channel* chan = getChannel(channel);
-    switch (chan->algorithm) {
-    case 7:
-        writeOperatorReg(channel, 0, REG_TOTAL_LEVEL, totalLevel);
-        writeOperatorReg(channel, 1, REG_TOTAL_LEVEL, totalLevel);
-        writeOperatorReg(channel, 2, REG_TOTAL_LEVEL, totalLevel);
-        writeOperatorReg(channel, 3, REG_TOTAL_LEVEL, totalLevel);
-        break;
-    case 6:
-    case 5:
-        writeOperatorReg(channel, 1, REG_TOTAL_LEVEL, totalLevel);
-        writeOperatorReg(channel, 2, REG_TOTAL_LEVEL, totalLevel);
-        writeOperatorReg(channel, 3, REG_TOTAL_LEVEL, totalLevel);
-        break;
-    case 4:
-        writeOperatorReg(channel, 2, REG_TOTAL_LEVEL, totalLevel);
-        writeOperatorReg(channel, 3, REG_TOTAL_LEVEL, totalLevel);
-        break;
-    default:
-        writeOperatorReg(channel, 3, REG_TOTAL_LEVEL, totalLevel);
-        break;
-    }
-}
-
 void synth_volume(u8 channel, u8 volume)
 {
     volumes[channel] = volume;
diff --git a/src/synth.h b/src/synth.h
index 9ba45d8e..7ac53e4c 100644
--- a/src/synth.h
+++ b/src/synth.h
@@ -41,7 +41,6 @@ void synth_init(void);
 void synth_noteOn(u8 channel);
 void synth_noteOff(u8 channel);
 void synth_pitch(u8 channel, u8 octave, u16 freqNumber);
-void synth_totalLevel(u8 channel, u8 totalLevel);
 void synth_volume(u8 channel, u8 volume);
 void synth_stereo(u8 channel, u8 mode);
 void synth_algorithm(u8 channel, u8 algorithm);
diff --git a/tests/Makefile b/tests/Makefile
index 06870066..09e23c06 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -27,7 +27,6 @@ MOCKS=midi_process \
 	synth_noteOn \
 	synth_noteOff \
 	synth_pitch \
-	synth_totalLevel \
 	synth_stereo \
 	synth_algorithm \
 	synth_feedback \
diff --git a/tests/unit/main.c b/tests/unit/main.c
index 6531456e..30437f29 100644
--- a/tests/unit/main.c
+++ b/tests/unit/main.c
@@ -94,10 +94,6 @@ int main(void)
         synth_test(test_synth_sets_note_off_fm_reg_chan_0_to_2),
         synth_test(test_synth_sets_note_off_fm_reg_chan_3_to_5),
         synth_test(test_synth_sets_octave_and_freq_reg_chan),
-        synth_test(test_synth_sets_total_level_reg_chan_for_algorithms_0_to_3),
-        synth_test(test_synth_sets_total_level_reg_chan_for_algorithm_4),
-        synth_test(test_synth_sets_total_level_reg_chan_for_algorithms_5_and_6),
-        synth_test(test_synth_sets_total_level_reg_chan_for_algorithm_7),
         synth_test(test_synth_sets_stereo_ams_and_freq),
         synth_test(test_synth_sets_algorithm),
         synth_test(test_synth_sets_feedback),
diff --git a/tests/unit/test_synth.c b/tests/unit/test_synth.c
index 269ab28d..5ddf6627 100644
--- a/tests/unit/test_synth.c
+++ b/tests/unit/test_synth.c
@@ -14,7 +14,6 @@ extern void __real_synth_noteOff(u8 channel);
 extern void __real_synth_enableLfo(u8 enable);
 extern void __real_synth_globalLfoFrequency(u8 freq);
 extern void __real_synth_pitch(u8 channel, u8 octave, u16 freqNumber);
-extern void __real_synth_totalLevel(u8 channel, u8 totalLevel);
 extern void __real_synth_stereo(u8 channel, u8 stereo);
 extern void __real_synth_ams(u8 channel, u8 ams);
 extern void __real_synth_fms(u8 channel, u8 fms);
@@ -101,60 +100,6 @@ static void test_synth_sets_octave_and_freq_reg_chan(UNUSED void** state)
     }
 }
 
-static void test_synth_sets_total_level_reg_chan_for_algorithms_0_to_3(
-    UNUSED void** state)
-{
-    for (u8 algorithm = 0; algorithm < 4; algorithm++)
-        for (u8 chan = 0; chan < MAX_FM_CHANS; chan++) {
-            expect_ym2612_write_channel_any_data(chan, 0xB0);
-            expect_ym2612_write_operator(chan, 3, 0x40, 0);
-            __real_synth_algorithm(chan, algorithm);
-            __real_synth_totalLevel(chan, 0);
-        }
-}
-
-static void test_synth_sets_total_level_reg_chan_for_algorithm_4(
-    UNUSED void** state)
-{
-    const u8 algorithm = 4;
-    for (u8 chan = 0; chan < MAX_FM_CHANS; chan++) {
-        expect_ym2612_write_channel_any_data(chan, 0xB0);
-        expect_ym2612_write_operator(chan, 2, 0x40, 0);
-        expect_ym2612_write_operator(chan, 3, 0x40, 0);
-        __real_synth_algorithm(chan, algorithm);
-        __real_synth_totalLevel(chan, 0);
-    }
-}
-
-static void test_synth_sets_total_level_reg_chan_for_algorithms_5_and_6(
-    UNUSED void** state)
-{
-    for (u8 algorithm = 5; algorithm < 6; algorithm++)
-        for (u8 chan = 0; chan < MAX_FM_CHANS; chan++) {
-            expect_ym2612_write_channel_any_data(chan, 0xB0);
-            expect_ym2612_write_operator(chan, 1, 0x40, 0);
-            expect_ym2612_write_operator(chan, 2, 0x40, 0);
-            expect_ym2612_write_operator(chan, 3, 0x40, 0);
-            __real_synth_algorithm(chan, algorithm);
-            __real_synth_totalLevel(chan, 0);
-        }
-}
-
-static void test_synth_sets_total_level_reg_chan_for_algorithm_7(
-    UNUSED void** state)
-{
-    const u8 algorithm = 7;
-    for (u8 chan = 0; chan < MAX_FM_CHANS; chan++) {
-        expect_ym2612_write_channel_any_data(chan, 0xB0);
-        expect_ym2612_write_operator(chan, 0, 0x40, 0);
-        expect_ym2612_write_operator(chan, 1, 0x40, 0);
-        expect_ym2612_write_operator(chan, 2, 0x40, 0);
-        expect_ym2612_write_operator(chan, 3, 0x40, 0);
-        __real_synth_algorithm(chan, algorithm);
-        __real_synth_totalLevel(chan, 0);
-    }
-}
-
 static void test_synth_sets_stereo_ams_and_freq(UNUSED void** state)
 {
     const u8 ams = 1;