diff --git a/src/engine/platform/vrc6.cpp b/src/engine/platform/vrc6.cpp
index 9b4c49f03..f798d6e8d 100644
--- a/src/engine/platform/vrc6.cpp
+++ b/src/engine/platform/vrc6.cpp
@@ -81,7 +81,7 @@ void DivPlatformVRC6::acquire(short** buf, size_t len) {
     int sample=vrc6.out()<<9; // scale to 16 bit
     if (sample>32767) sample=32767;
     if (sample<-32768) sample=-32768;
-    buf[0][i]=buf[1][i]=sample;
+    buf[0][i]=sample;
 
     // Oscilloscope buffer part
     if (++writeOscBuf>=32) {