diff --git a/js-programming/bytebeat-render.js b/js-programming/bytebeat-render.js
index 8c30451..e6fa4f2 100644
--- a/js-programming/bytebeat-render.js
+++ b/js-programming/bytebeat-render.js
@@ -81,7 +81,7 @@ function main() {
 	let lastCorrectSample
 	switch (SELECTED_TYPE) {
 	case TYPE_BYTEBEAT:
-		lastCorrectSample = 127
+		lastCorrectSample = 128
 		break
 	case TYPE_SIGNED_BYTEBEAT:
 		lastCorrectSample = 0