diff --git a/SoundEngine/famistudio_asm6.asm b/SoundEngine/famistudio_asm6.asm
index 28108c636..798d9d801 100644
--- a/SoundEngine/famistudio_asm6.asm
+++ b/SoundEngine/famistudio_asm6.asm
@@ -1,6 +1,6 @@
 ;======================================================================================================================
-; FAMISTUDIO SOUND ENGINE (4.1.0)
-; Copyright (c) 2019-2023 Mathieu Gauthier
+; FAMISTUDIO SOUND ENGINE (4.2.0)
+; Copyright (c) 2019-2024 Mathieu Gauthier
 ;
 ; Copying and distribution of this file, with or without
 ; modification, are permitted in any medium without royalty provided
@@ -145,6 +145,9 @@ FAMISTUDIO_CFG_NTSC_SUPPORT  = 1
 ; FAMISTUDIO_CFG_SFX_SUPPORT   = 1 
 ; FAMISTUDIO_CFG_SFX_STREAMS   = 2
 
+; Multiple sound effects are overlaid from beginning to end, mixed and played back. For reused channels, some sound effects may sound strange.
+; FAMISTUDIO_CFG_SFX_MIXED = 1
+
 ; Blaarg's smooth vibrato technique. Eliminates phase resets ("pops") on square channels. 
 ; FAMISTUDIO_CFG_SMOOTH_VIBRATO = 1 
 
@@ -346,12 +349,17 @@ FAMISTUDIO_USE_ARPEGGIO          = 1
 .ifndef FAMISTUDIO_CFG_SFX_SUPPORT
     FAMISTUDIO_CFG_SFX_SUPPORT = 0
     FAMISTUDIO_CFG_SFX_STREAMS = 0
+    FAMISTUDIO_CFG_SFX_MIXED = 0
 .endif
 
 .ifndef FAMISTUDIO_CFG_SFX_STREAMS
     FAMISTUDIO_CFG_SFX_STREAMS = 1
 .endif
 
+.ifndef FAMISTUDIO_CFG_SFX_MIXED
+    FAMISTUDIO_CFG_SFX_MIXED = 0
+.endif
+
 .ifndef FAMISTUDIO_CFG_C_BINDINGS
     FAMISTUDIO_CFG_C_BINDINGS = 0
 .endif
@@ -6532,6 +6540,37 @@ famistudio_sfx_play:
     asl a
     tay
 
+.if FAMISTUDIO_CFG_SFX_MIXED = 0
+    .if FAMISTUDIO_CFG_SFX_STREAMS = 4 ; Check if the high priority sound effects is playing
+        cpx #FAMISTUDIO_SFX_CH3
+        beq @write_channel
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS = 3
+        cpx #FAMISTUDIO_SFX_CH2
+        beq @write_channel
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS = 2
+        cpx #FAMISTUDIO_SFX_CH1
+        beq @write_channel
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 3
+        lda famistudio_sfx_ptr_hi+FAMISTUDIO_SFX_CH3
+        bne @ignore_channel
+    .endif
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 2
+        lda famistudio_sfx_ptr_hi+FAMISTUDIO_SFX_CH2
+        bne @ignore_channel
+    .endif
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+        lda famistudio_sfx_ptr_hi+FAMISTUDIO_SFX_CH1
+        bne @ignore_channel
+    .endif
+.endif
+
+@write_channel:
     jsr famistudio_sfx_clear_channel ; Stops the effect if it plays
 
     lda famistudio_sfx_addr_lo
@@ -6545,6 +6584,7 @@ famistudio_sfx_play:
     lda (effect_data_ptr),y
     sta famistudio_sfx_ptr_hi,x ; This write enables the effect
 
+@ignore_channel:
     rts
 
 ;======================================================================================================================
@@ -6567,12 +6607,50 @@ famistudio_sfx_update:
     bne @update_buf ; Just mix with output buffer
 
 @no_repeat:
+.if FAMISTUDIO_CFG_SFX_MIXED = 0
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+        stx tmp
+    .endif
+.endif
     lda famistudio_sfx_ptr_hi,x ; Check if MSB of the pointer is not zero
-    bne @sfx_active
+    bne @clear_other_channel
     rts ; Return otherwise, no active effect
 
+@clear_other_channel:
+.if FAMISTUDIO_CFG_SFX_MIXED = 0
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+        cpx #FAMISTUDIO_SFX_CH0
+        beq @sfx_active
+
+        ldx #FAMISTUDIO_SFX_CH0
+        jsr famistudio_sfx_clear_channel
+        ldx tmp
+        cpx #FAMISTUDIO_SFX_CH1
+        beq @sfx_active
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 2
+        ldx #FAMISTUDIO_SFX_CH1
+        jsr famistudio_sfx_clear_channel
+        ldx tmp
+        cpx #FAMISTUDIO_SFX_CH2
+        beq @sfx_active
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 3
+        ldx #FAMISTUDIO_SFX_CH2
+        jsr famistudio_sfx_clear_channel
+    .endif
+.endif
+
 @sfx_active:
-    sta effect_data_ptr+1         ;load effect pointer into temp
+.if FAMISTUDIO_CFG_SFX_MIXED = 0
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+        ldx tmp                       ;load effect pointer into temp
+        lda famistudio_sfx_ptr_hi,x
+    .endif
+.endif
+    sta effect_data_ptr+1
     lda famistudio_sfx_ptr_lo,x
     sta effect_data_ptr+0
     ldy famistudio_sfx_offset,x
@@ -6615,13 +6693,9 @@ famistudio_sfx_update:
     sta famistudio_sfx_ptr_hi,x ; Mark channel as inactive
 
 @update_buf:
-    lda famistudio_output_buf ; Compare effect output buffer with main output buffer
-    and #$0f ; If volume of pulse 1 of effect is higher than that of the main buffer, overwrite the main buffer value with the new one
-    sta tmp 
-    lda famistudio_sfx_buffer+0,x
+    lda famistudio_sfx_buffer+0,x ; Overwrite pulse 1 of main output buffer if it is active
     and #$0f
-    cmp tmp
-    bcc @no_pulse1
+    beq @no_pulse1
     lda famistudio_sfx_buffer+0,x
     sta famistudio_output_buf+0
     lda famistudio_sfx_buffer+1,x
@@ -6630,13 +6704,9 @@ famistudio_sfx_update:
     sta famistudio_output_buf+2
 
 @no_pulse1:
-    lda famistudio_output_buf+3
-    and #$0f
-    sta tmp
     lda famistudio_sfx_buffer+3,x
     and #$0f
-    cmp tmp
-    bcc @no_pulse2
+    beq @no_pulse2
     lda famistudio_sfx_buffer+3,x
     sta famistudio_output_buf+3
     lda famistudio_sfx_buffer+4,x
@@ -6645,7 +6715,7 @@ famistudio_sfx_update:
     sta famistudio_output_buf+5
 
 @no_pulse2:
-    lda famistudio_sfx_buffer+6,x ; Overwrite triangle of main output buffer if it is active
+    lda famistudio_sfx_buffer+6,x
     beq @no_triangle
     sta famistudio_output_buf+6
     lda famistudio_sfx_buffer+7,x
@@ -6654,13 +6724,9 @@ famistudio_sfx_update:
     sta famistudio_output_buf+8
 
 @no_triangle:
-    lda famistudio_output_buf+9
-    and #$0f
-    sta tmp
     lda famistudio_sfx_buffer+9,x
     and #$0f
-    cmp tmp
-    bcc @no_noise
+    beq @no_noise
     lda famistudio_sfx_buffer+9,x
     sta famistudio_output_buf+9
     lda famistudio_sfx_buffer+10,x
diff --git a/SoundEngine/famistudio_ca65.s b/SoundEngine/famistudio_ca65.s
index 088c7450d..d24efd74e 100644
--- a/SoundEngine/famistudio_ca65.s
+++ b/SoundEngine/famistudio_ca65.s
@@ -1,6 +1,6 @@
 ;======================================================================================================================
-; FAMISTUDIO SOUND ENGINE (4.1.0)
-; Copyright (c) 2019-2023 Mathieu Gauthier
+; FAMISTUDIO SOUND ENGINE (4.2.0)
+; Copyright (c) 2019-2024 Mathieu Gauthier
 ;
 ; Copying and distribution of this file, with or without
 ; modification, are permitted in any medium without royalty provided
@@ -146,6 +146,9 @@ FAMISTUDIO_CFG_NTSC_SUPPORT  = 1
 ; FAMISTUDIO_CFG_SFX_SUPPORT   = 1 
 ; FAMISTUDIO_CFG_SFX_STREAMS   = 2
 
+; Multiple sound effects are overlaid from beginning to end, mixed and played back. For reused channels, some sound effects may sound strange.
+; FAMISTUDIO_CFG_SFX_MIXED = 1
+
 ; Blaarg's smooth vibrato technique. Eliminates phase resets ("pops") on square channels. 
 ; FAMISTUDIO_CFG_SMOOTH_VIBRATO = 1 
 
@@ -347,12 +350,17 @@ FAMISTUDIO_USE_ARPEGGIO          = 1
 .ifndef FAMISTUDIO_CFG_SFX_SUPPORT
     FAMISTUDIO_CFG_SFX_SUPPORT = 0
     FAMISTUDIO_CFG_SFX_STREAMS = 0
+    FAMISTUDIO_CFG_SFX_MIXED = 0
 .endif
 
 .ifndef FAMISTUDIO_CFG_SFX_STREAMS
     FAMISTUDIO_CFG_SFX_STREAMS = 1
 .endif
 
+.ifndef FAMISTUDIO_CFG_SFX_MIXED
+    FAMISTUDIO_CFG_SFX_MIXED = 0
+.endif
+
 .ifndef FAMISTUDIO_CFG_C_BINDINGS
     FAMISTUDIO_CFG_C_BINDINGS = 0
 .endif
@@ -6578,6 +6586,37 @@ famistudio_sfx_play:
     asl a
     tay
 
+.if FAMISTUDIO_CFG_SFX_MIXED = 0
+    .if FAMISTUDIO_CFG_SFX_STREAMS = 4 ; Check if the high priority sound effects is playing
+        cpx #FAMISTUDIO_SFX_CH3
+        beq @write_channel
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS = 3
+        cpx #FAMISTUDIO_SFX_CH2
+        beq @write_channel
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS = 2
+        cpx #FAMISTUDIO_SFX_CH1
+        beq @write_channel
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 3
+        lda famistudio_sfx_ptr_hi+FAMISTUDIO_SFX_CH3
+        bne @ignore_channel
+    .endif
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 2
+        lda famistudio_sfx_ptr_hi+FAMISTUDIO_SFX_CH2
+        bne @ignore_channel
+    .endif
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+        lda famistudio_sfx_ptr_hi+FAMISTUDIO_SFX_CH1
+        bne @ignore_channel
+    .endif
+.endif
+
+@write_channel:
     jsr famistudio_sfx_clear_channel ; Stops the effect if it plays
 
     lda famistudio_sfx_addr_lo
@@ -6591,6 +6630,7 @@ famistudio_sfx_play:
     lda (@effect_data_ptr),y
     sta famistudio_sfx_ptr_hi,x ; This write enables the effect
 
+@ignore_channel:
     rts
 
 ;======================================================================================================================
@@ -6613,12 +6653,50 @@ famistudio_sfx_update:
     bne @update_buf ; Just mix with output buffer
 
 @no_repeat:
+.if FAMISTUDIO_CFG_SFX_MIXED = 0
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+        stx @tmp
+    .endif
+.endif
     lda famistudio_sfx_ptr_hi,x ; Check if MSB of the pointer is not zero
-    bne @sfx_active
+    bne @clear_other_channel
     rts ; Return otherwise, no active effect
 
+@clear_other_channel:
+.if FAMISTUDIO_CFG_SFX_MIXED = 0
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+        cpx #FAMISTUDIO_SFX_CH0
+        beq @sfx_active
+
+        ldx #FAMISTUDIO_SFX_CH0
+        jsr famistudio_sfx_clear_channel
+        ldx @tmp
+        cpx #FAMISTUDIO_SFX_CH1
+        beq @sfx_active
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 2
+        ldx #FAMISTUDIO_SFX_CH1
+        jsr famistudio_sfx_clear_channel
+        ldx @tmp
+        cpx #FAMISTUDIO_SFX_CH2
+        beq @sfx_active
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 3
+        ldx #FAMISTUDIO_SFX_CH2
+        jsr famistudio_sfx_clear_channel
+    .endif
+.endif
+
 @sfx_active:
-    sta @effect_data_ptr+1         ;load effect pointer into temp
+.if FAMISTUDIO_CFG_SFX_MIXED = 0
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+        ldx @tmp                       ;load effect pointer into temp
+        lda famistudio_sfx_ptr_hi,x
+    .endif
+.endif
+    sta @effect_data_ptr+1
     lda famistudio_sfx_ptr_lo,x
     sta @effect_data_ptr+0
     ldy famistudio_sfx_offset,x
@@ -6661,13 +6739,9 @@ famistudio_sfx_update:
     sta famistudio_sfx_ptr_hi,x ; Mark channel as inactive
 
 @update_buf:
-    lda famistudio_output_buf ; Compare effect output buffer with main output buffer
-    and #$0f ; If volume of pulse 1 of effect is higher than that of the main buffer, overwrite the main buffer value with the new one
-    sta @tmp 
-    lda famistudio_sfx_buffer+0,x
+    lda famistudio_sfx_buffer+0,x ; Overwrite pulse 1 of main output buffer if it is active
     and #$0f
-    cmp @tmp
-    bcc @no_pulse1
+    beq @no_pulse1
     lda famistudio_sfx_buffer+0,x
     sta famistudio_output_buf+0
     lda famistudio_sfx_buffer+1,x
@@ -6676,13 +6750,9 @@ famistudio_sfx_update:
     sta famistudio_output_buf+2
 
 @no_pulse1:
-    lda famistudio_output_buf+3
-    and #$0f
-    sta @tmp
     lda famistudio_sfx_buffer+3,x
     and #$0f
-    cmp @tmp
-    bcc @no_pulse2
+    beq @no_pulse2
     lda famistudio_sfx_buffer+3,x
     sta famistudio_output_buf+3
     lda famistudio_sfx_buffer+4,x
@@ -6691,7 +6761,7 @@ famistudio_sfx_update:
     sta famistudio_output_buf+5
 
 @no_pulse2:
-    lda famistudio_sfx_buffer+6,x ; Overwrite triangle of main output buffer if it is active
+    lda famistudio_sfx_buffer+6,x
     beq @no_triangle
     sta famistudio_output_buf+6
     lda famistudio_sfx_buffer+7,x
@@ -6700,13 +6770,9 @@ famistudio_sfx_update:
     sta famistudio_output_buf+8
 
 @no_triangle:
-    lda famistudio_output_buf+9
-    and #$0f
-    sta @tmp
     lda famistudio_sfx_buffer+9,x
     and #$0f
-    cmp @tmp
-    bcc @no_noise
+    beq @no_noise
     lda famistudio_sfx_buffer+9,x
     sta famistudio_output_buf+9
     lda famistudio_sfx_buffer+10,x
diff --git a/SoundEngine/famistudio_nesasm.asm b/SoundEngine/famistudio_nesasm.asm
index b3029cb5b..530dc9791 100644
--- a/SoundEngine/famistudio_nesasm.asm
+++ b/SoundEngine/famistudio_nesasm.asm
@@ -1,6 +1,6 @@
 ;======================================================================================================================
-; FAMISTUDIO SOUND ENGINE (4.1.0)
-; Copyright (c) 2019-2023 Mathieu Gauthier
+; FAMISTUDIO SOUND ENGINE (4.2.0)
+; Copyright (c) 2019-2024 Mathieu Gauthier
 ;
 ; Copying and distribution of this file, with or without
 ; modification, are permitted in any medium without royalty provided
@@ -164,6 +164,9 @@ FAMISTUDIO_CFG_NTSC_SUPPORT  = 1
 ; FAMISTUDIO_CFG_SFX_SUPPORT   = 1 
 ; FAMISTUDIO_CFG_SFX_STREAMS   = 2
 
+; Multiple sound effects are overlaid from beginning to end, mixed and played back. For reused channels, some sound effects may sound strange.
+; FAMISTUDIO_CFG_SFX_MIXED = 1
+
 ; Blaarg's smooth vibrato technique. Eliminates phase resets ("pops") on square channels. 
 ; FAMISTUDIO_CFG_SMOOTH_VIBRATO = 1 
 
@@ -362,12 +365,17 @@ FAMISTUDIO_DUAL_SUPPORT = 0
     .ifndef FAMISTUDIO_CFG_SFX_SUPPORT
 FAMISTUDIO_CFG_SFX_SUPPORT = 0
 FAMISTUDIO_CFG_SFX_STREAMS = 0
+FAMISTUDIO_CFG_SFX_MIXED = 0
     .endif
 
     .ifndef FAMISTUDIO_CFG_SFX_STREAMS
 FAMISTUDIO_CFG_SFX_STREAMS = 1
     .endif
 
+    .ifndef FAMISTUDIO_CFG_SFX_MIXED
+FAMISTUDIO_CFG_SFX_MIXED = 0
+    .endif
+
     .ifndef FAMISTUDIO_CFG_SMOOTH_VIBRATO
 FAMISTUDIO_CFG_SMOOTH_VIBRATO = 0
     .endif
@@ -6591,6 +6599,37 @@ famistudio_sfx_play:
     asl a
     tay
 
+    .if FAMISTUDIO_CFG_SFX_MIXED = 0
+        .if FAMISTUDIO_CFG_SFX_STREAMS = 4 ; Check if the high priority sound effects is playing
+            cpx #FAMISTUDIO_SFX_CH3
+            beq .write_channel
+        .endif
+
+        .if FAMISTUDIO_CFG_SFX_STREAMS = 3
+            cpx #FAMISTUDIO_SFX_CH2
+            beq .write_channel
+        .endif
+
+        .if FAMISTUDIO_CFG_SFX_STREAMS = 2
+            cpx #FAMISTUDIO_SFX_CH1
+            beq .write_channel
+        .endif
+
+        .if FAMISTUDIO_CFG_SFX_STREAMS > 3
+            lda famistudio_sfx_ptr_hi+FAMISTUDIO_SFX_CH3
+            bne .ignore_channel
+        .endif
+        .if FAMISTUDIO_CFG_SFX_STREAMS > 2
+            lda famistudio_sfx_ptr_hi+FAMISTUDIO_SFX_CH2
+            bne .ignore_channel
+        .endif
+        .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+            lda famistudio_sfx_ptr_hi+FAMISTUDIO_SFX_CH1
+            bne .ignore_channel
+        .endif
+    .endif
+
+.write_channel:
     jsr famistudio_sfx_clear_channel ; Stops the effect if it plays
 
     lda famistudio_sfx_addr_lo
@@ -6604,6 +6643,7 @@ famistudio_sfx_play:
     lda [.effect_data_ptr],y
     sta famistudio_sfx_ptr_hi,x ; This write enables the effect
 
+.ignore_channel:
     rts
 
 ;======================================================================================================================
@@ -6626,12 +6666,50 @@ famistudio_sfx_update:
     bne .update_buf ; Just mix with output buffer
 
 .no_repeat:
+    .if FAMISTUDIO_CFG_SFX_MIXED = 0
+        .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+            stx tmp
+        .endif
+    .endif
     lda famistudio_sfx_ptr_hi,x ; Check if MSB of the pointer is not zero
-    bne .sfx_active
+    bne .clear_other_channel
     rts ; Return otherwise, no active effect
 
+.clear_other_channel:
+.if FAMISTUDIO_CFG_SFX_MIXED = 0
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+        cpx #FAMISTUDIO_SFX_CH0
+        beq .sfx_active
+
+        ldx #FAMISTUDIO_SFX_CH0
+        jsr famistudio_sfx_clear_channel
+        ldx tmp
+        cpx #FAMISTUDIO_SFX_CH1
+        beq .sfx_active
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 2
+        ldx #FAMISTUDIO_SFX_CH1
+        jsr famistudio_sfx_clear_channel
+        ldx tmp
+        cpx #FAMISTUDIO_SFX_CH2
+        beq .sfx_active
+    .endif
+
+    .if FAMISTUDIO_CFG_SFX_STREAMS > 3
+        ldx #FAMISTUDIO_SFX_CH2
+        jsr famistudio_sfx_clear_channel
+    .endif
+.endif
+
 .sfx_active:
-    sta <.effect_data_ptr+1         ;load effect pointer into temp
+    .if FAMISTUDIO_CFG_SFX_MIXED = 0
+        .if FAMISTUDIO_CFG_SFX_STREAMS > 1
+            ldx tmp                       ;load effect pointer into temp
+            lda famistudio_sfx_ptr_hi,x
+        .endif
+    .endif
+    sta <.effect_data_ptr+1
     lda famistudio_sfx_ptr_lo,x
     sta <.effect_data_ptr+0
     ldy famistudio_sfx_offset,x
@@ -6674,13 +6752,9 @@ famistudio_sfx_update:
     sta famistudio_sfx_ptr_hi,x ; Mark channel as inactive
 
 .update_buf:
-    lda famistudio_output_buf ; Compare effect output buffer with main output buffer
-    and #$0f ; If volume of pulse 1 of effect is higher than that of the main buffer, overwrite the main buffer value with the new one
-    sta <.tmp 
-    lda famistudio_sfx_buffer+0,x
+    lda famistudio_sfx_buffer+0,x ; Overwrite pulse 1 of main output buffer if it is active
     and #$0f
-    cmp <.tmp
-    bcc .no_pulse1
+    beq .no_pulse1
     lda famistudio_sfx_buffer+0,x
     sta famistudio_output_buf+0
     lda famistudio_sfx_buffer+1,x
@@ -6689,13 +6763,9 @@ famistudio_sfx_update:
     sta famistudio_output_buf+2
 
 .no_pulse1:
-    lda famistudio_output_buf+3
-    and #$0f
-    sta <.tmp
     lda famistudio_sfx_buffer+3,x
     and #$0f
-    cmp <.tmp
-    bcc .no_pulse2
+    beq .no_pulse2
     lda famistudio_sfx_buffer+3,x
     sta famistudio_output_buf+3
     lda famistudio_sfx_buffer+4,x
@@ -6704,7 +6774,7 @@ famistudio_sfx_update:
     sta famistudio_output_buf+5
 
 .no_pulse2:
-    lda famistudio_sfx_buffer+6,x ; Overwrite triangle of main output buffer if it is active
+    lda famistudio_sfx_buffer+6,x
     beq .no_triangle
     sta famistudio_output_buf+6
     lda famistudio_sfx_buffer+7,x
@@ -6713,13 +6783,9 @@ famistudio_sfx_update:
     sta famistudio_output_buf+8
 
 .no_triangle:
-    lda famistudio_output_buf+9
-    and #$0f
-    sta <.tmp
     lda famistudio_sfx_buffer+9,x
     and #$0f
-    cmp <.tmp
-    bcc .no_noise
+    beq .no_noise
     lda famistudio_sfx_buffer+9,x
     sta famistudio_output_buf+9
     lda famistudio_sfx_buffer+10,x