diff --git a/src/opcodes/effects.asm b/src/opcodes/effects.asm
index 6bb017e..0c27b72 100644
--- a/src/opcodes/effects.asm
+++ b/src/opcodes/effects.asm
@@ -78,6 +78,27 @@ su_op_hold_holding:
 
 %endif ; HOLD_ID > -1
 
+;-------------------------------------------------------------------------------
+;   CRUSH Tick
+;-------------------------------------------------------------------------------
+%if CRUSH_ID > -1
+
+SECT_TEXT(sucrush)
+
+EXPORT MANGLE_FUNC(su_op_crush,0)
+%ifdef INCLUDE_STEREO_CRUSH
+    jnc     su_op_crush_mono
+    call    su_stereo_filterhelper
+    %define INCLUDE_STEREO_FILTERHELPER
+su_op_crush_mono:
+%endif    
+    fdiv    dword [edx+su_crush_ports.resolution]
+    frndint
+    fmul    dword [edx+su_crush_ports.resolution]
+    ret
+
+%endif ; CRUSH_ID > -1
+
 ;-------------------------------------------------------------------------------
 ;   GAIN Tick
 ;-------------------------------------------------------------------------------
diff --git a/src/opcodes/effects.inc b/src/opcodes/effects.inc
index 2bd70ba..784f51e 100644
--- a/src/opcodes/effects.inc
+++ b/src/opcodes/effects.inc
@@ -156,6 +156,36 @@ struc su_hold_wrk
     .holdval    resd    1
 endstruc
 
+;-------------------------------------------------------------------------------
+;   CRUSH effect related defines
+;-------------------------------------------------------------------------------
+%assign CRUSH_ID -1
+
+%macro USE_CRUSH 0
+    %if CRUSH_ID == -1
+        %assign CRUSH_ID CUR_ID
+        %assign CUR_ID CUR_ID + 2
+        %xdefine OPCODES OPCODES MANGLE_FUNC(su_op_crush,0),
+        %xdefine NUMPARAMS NUMPARAMS 1,
+    %endif
+%endmacro
+
+%macro SU_CRUSH 2
+    db  %2
+    USE_CRUSH
+    %xdefine CMDS CMDS CRUSH_ID + %1,
+    %if %1 == STEREO
+        %define INCLUDE_STEREO_CRUSH
+    %endif
+%endmacro
+
+%define RESOLUTION(val) val
+
+struc su_crush_ports
+    .resolution     resd    1
+    .params
+endstruc
+
 ;-------------------------------------------------------------------------------
 ;   GAIN effect related defines
 ;-------------------------------------------------------------------------------
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 033cf0e..c68bc81 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -97,6 +97,9 @@ regression_test(test_hold_stereo HOLD)
 regression_test(test_clip "VCO_SINE;ENVELOPE;FOP_MULP;INVGAIN" CLIP)
 regression_test(test_clip_stereo CLIP)
 
+regression_test(test_crush "VCO_SINE;ENVELOPE;FOP_MULP;INVGAIN" CRUSH)
+regression_test(test_crush_stereo CRUSH)
+
 regression_test(test_filter_band "VCO_SINE;ENVELOPE;FOP_MULP")
 regression_test(test_filter_low "VCO_SINE;ENVELOPE;FOP_MULP")
 regression_test(test_filter_high "VCO_SINE;ENVELOPE;FOP_MULP")
diff --git a/tests/expected_output/test_crush.raw b/tests/expected_output/test_crush.raw
new file mode 100644
index 0000000..0e08f81
Binary files /dev/null and b/tests/expected_output/test_crush.raw differ
diff --git a/tests/expected_output/test_crush_stereo.raw b/tests/expected_output/test_crush_stereo.raw
new file mode 100644
index 0000000..0d93cbb
Binary files /dev/null and b/tests/expected_output/test_crush_stereo.raw differ
diff --git a/tests/test_crush.asm b/tests/test_crush.asm
new file mode 100644
index 0000000..467bc4b
--- /dev/null
+++ b/tests/test_crush.asm
@@ -0,0 +1,28 @@
+%define BPM 100
+%define USE_SECTIONS
+
+%include "../src/sointu.inc"
+
+SU_BEGIN_PATTERNS
+    PATTERN 64, 0, 68, 0, 32, 0, 0, 0,  75, 0, 78, 0,   0, 0, 0, 0,
+SU_END_PATTERNS
+
+SU_BEGIN_TRACKS
+    TRACK   VOICES(1),0
+SU_END_TRACKS
+
+SU_BEGIN_PATCH
+    SU_BEGIN_INSTRUMENT VOICES(1) ; Instrument0
+        SU_ENVELOPE MONO, ATTAC(32),DECAY(32),SUSTAIN(128),RELEASE(64),GAIN(128)
+        SU_OSCILLAT MONO, TRANSPOSE(64),DETUNE(64),PHASE(0),COLOR(96),SHAPE(64),GAIN(128), FLAGS(SINE)
+        SU_MULP     MONO
+        SU_CRUSH    MONO, RESOLUTION(3)
+        SU_ENVELOPE MONO, ATTAC(32),DECAY(32),SUSTAIN(128),RELEASE(64),GAIN(128)        
+        SU_OSCILLAT MONO, TRANSPOSE(72),DETUNE(64),PHASE(64),COLOR(64),SHAPE(96),GAIN(128), FLAGS(SINE)
+        SU_MULP     MONO
+        SU_CRUSH    MONO, RESOLUTION(64)
+        SU_OUT      STEREO, GAIN(128)
+    SU_END_INSTRUMENT
+SU_END_PATCH
+
+%include "../src/sointu.asm"
diff --git a/tests/test_crush_stereo.asm b/tests/test_crush_stereo.asm
new file mode 100644
index 0000000..a2ee630
--- /dev/null
+++ b/tests/test_crush_stereo.asm
@@ -0,0 +1,27 @@
+%define BPM 100
+%define USE_SECTIONS
+
+%include "../src/sointu.inc"
+
+SU_BEGIN_PATTERNS
+    PATTERN 64, 0, 68, 0, 32, 0, 0, 0,  75, 0, 78, 0,   0, 0, 0, 0,
+SU_END_PATTERNS
+
+SU_BEGIN_TRACKS
+    TRACK   VOICES(1),0
+SU_END_TRACKS
+
+SU_BEGIN_PATCH
+    SU_BEGIN_INSTRUMENT VOICES(1) ; Instrument0
+        SU_ENVELOPE MONO, ATTAC(32),DECAY(32),SUSTAIN(128),RELEASE(64),GAIN(128)
+        SU_OSCILLAT MONO, TRANSPOSE(64),DETUNE(64),PHASE(0),COLOR(96),SHAPE(64),GAIN(128), FLAGS(SINE)
+        SU_MULP     MONO        
+        SU_ENVELOPE MONO, ATTAC(32),DECAY(32),SUSTAIN(128),RELEASE(64),GAIN(128)        
+        SU_OSCILLAT MONO, TRANSPOSE(72),DETUNE(64),PHASE(64),COLOR(64),SHAPE(96),GAIN(128), FLAGS(SINE)
+        SU_MULP     MONO
+        SU_CRUSH    STEREO, RESOLUTION(32)
+        SU_OUT      STEREO, GAIN(128)
+    SU_END_INSTRUMENT
+SU_END_PATCH
+
+%include "../src/sointu.asm"