diff --git a/win/main.cpp b/win/main.cpp
index ce80836..1e5a977 100644
--- a/win/main.cpp
+++ b/win/main.cpp
@@ -19,13 +19,24 @@ static inline unsigned char voice_arp(unsigned long i)
 	return (((i << 1) / (notes[arpeggio[arpseq[(i >> 13) & 7]][(i >> 8) & 3]] >> 2)) & 1) << 7;
 }
 
+int notes2[25] = { 134, 142, 150, 159, 169, 179, 189, 201, 213, 225, 239, 253, 268, 284, 301, 319, 338, 358, 379, 401, 425, 451, 477, 506, 536 };
+int bassbeat[8] = { 0, 0, 1, 0, 0, 1, 0, 1 };
+int bassline[8] = { 12, 12, 15, 10, 12, 12, 17, 10 };
+
+static inline unsigned char voice_bass(unsigned long i)
+{
+	int note = notes2[bassline[(i >> 13) & 7]];
+	int beat = bassbeat[(i >> 10) & 7] ? 7 : 8;
+	return (((i * note) >> beat) & 0x7F) + (((i * note + i) >> beat) & 0x7F);
+}
+
 void fill(char *data)
 {
 	static unsigned long i = 0;
 
 	for (int j = 0; j < 4096; j++)
 	{
-		data[j] = voice_arp(i);
+		data[j] = voice_bass(i);
 		i++;
 	}
 }