diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index f2c5d4b..6fbfebd 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -91,4 +91,6 @@ regression_test(test_dll_im_modulation "ENVELOPE;FOP_MULP;PANNING;VCO_SINE;STORE
 
 regression_test(test_envelope_modulation "VCO_SINE;ENVELOPE;STORE")
 regression_test(test_envelope_16bit ENVELOPE "" test_envelope)
-target_compile_definitions(test_envelope_16bit PUBLIC GO4K_USE_16BIT_OUTPUT)
\ No newline at end of file
+target_compile_definitions(test_envelope_16bit PUBLIC GO4K_USE_16BIT_OUTPUT)
+
+regression_test(test_polyphony "ENVELOPE;VCO_SINE")
diff --git a/tests/expected_output/test_polyphony.raw b/tests/expected_output/test_polyphony.raw
new file mode 100644
index 0000000..4c12db0
Binary files /dev/null and b/tests/expected_output/test_polyphony.raw differ
diff --git a/tests/test_polyphony.asm b/tests/test_polyphony.asm
new file mode 100644
index 0000000..ff580e5
--- /dev/null
+++ b/tests/test_polyphony.asm
@@ -0,0 +1,72 @@
+%define	MAX_INSTRUMENTS	1
+%define	BPM	100
+%define	MAX_PATTERNS 1
+%define	SINGLE_FILE
+%define USE_SECTIONS
+%define MAX_VOICES 2
+
+%include "../src/4klang.asm"
+
+; //-------------------------------------------------------------------------------
+; // Pattern Data
+; //----------------------------------------------------------------------------------------
+SECT_DATA(g4kmuc1)
+
+EXPORT MANGLE_DATA(go4k_patterns)
+	db 64, HLD, 68, HLD, 32, HLD, HLD, HLD,	75, HLD, 78, HLD,	HLD, 0, 0, 0,		
+
+; //----------------------------------------------------------------------------------------
+; // Pattern Index List
+; //----------------------------------------------------------------------------------------
+SECT_DATA(g4kmuc2)
+
+EXPORT MANGLE_DATA(go4k_pattern_lists)
+Instrument0List		db	0,
+
+; //----------------------------------------------------------------------------------------
+; // Instrument	Commands
+; //----------------------------------------------------------------------------------------
+SECT_DATA(g4kmuc3)
+
+EXPORT MANGLE_DATA(go4k_synth_instructions)
+GO4K_BEGIN_CMDDEF(Instrument0)
+	db GO4K_ENV_ID	
+	db GO4K_ENV_ID	
+	db GO4K_VCO_ID	
+	db GO4K_VCO_ID	
+	db GO4K_FOP_ID
+	db GO4K_OUT_ID
+GO4K_END_CMDDEF
+;//	global commands
+GO4K_BEGIN_CMDDEF(Global)	
+	db GO4K_ACC_ID	
+	db GO4K_OUT_ID
+GO4K_END_CMDDEF
+go4k_synth_instructions_end
+; //----------------------------------------------------------------------------------------
+; // Intrument Data
+; //----------------------------------------------------------------------------------------
+SECT_DATA(g4kmuc4)
+
+EXPORT MANGLE_DATA(go4k_synth_parameter_values)
+GO4K_BEGIN_PARAMDEF(Instrument0)
+	GO4K_ENV	ATTAC(64),DECAY(64),SUSTAIN(64),RELEASE(64),GAIN(128)		
+	GO4K_ENV	ATTAC(64),DECAY(64),SUSTAIN(64),RELEASE(64),GAIN(128)	
+	GO4K_VCO	TRANSPOSE(64),DETUNE(64),PHASE(0),GATES(0),COLOR(128),SHAPE(64),GAIN(128),FLAGS(SINE)		
+	GO4K_VCO	TRANSPOSE(64),DETUNE(64),PHASE(0),GATES(0),COLOR(128),SHAPE(64),GAIN(128),FLAGS(SINE)		
+	GO4K_FOP	OP(FOP_MULP2)
+	GO4K_OUT	GAIN(128), AUXSEND(0)
+GO4K_END_PARAMDEF
+;//	global parameters
+GO4K_BEGIN_PARAMDEF(Global)	
+	GO4K_ACC	ACCTYPE(OUTPUT)	
+	GO4K_OUT	GAIN(128), AUXSEND(0)
+GO4K_END_PARAMDEF
+
+; //----------------------------------------------------------------------------------------
+; // Export MAX_SAMPLES for test_renderer
+; //----------------------------------------------------------------------------------------
+SECT_DATA(g4krender)
+
+EXPORT MANGLE_DATA(test_max_samples)
+	dd MAX_SAMPLES
\ No newline at end of file