diff --git a/core/src/zero1hd/polyjet/audio/AudioAnalyzer.java b/core/src/zero1hd/polyjet/audio/AudioAnalyzer.java
index f2ad2a8..6b0ed81 100755
--- a/core/src/zero1hd/polyjet/audio/AudioAnalyzer.java
+++ b/core/src/zero1hd/polyjet/audio/AudioAnalyzer.java
@@ -67,7 +67,7 @@ public class AudioAnalyzer {
 				bassThresholdMultiplier = 2.6f;
 				umThresholdMultiplier = 2f;
 				
-				bassBinBegin = 7;
+				bassBinBegin = 1;
 				bassBinEnd = 20;
 				
 				UMBinBegin = 300;
@@ -110,8 +110,13 @@ public class AudioAnalyzer {
 					//bass detection
 					fluxVal = 0;
 					for (int i = bassBinBegin; i < bassBinEnd && work; i++) {
-						fluxVal += ((spectrum[i] - lastSpectrum[i])) < 0
-								? 0 : (spectrum[i] - lastSpectrum[i]);
+						if (spectrum[i] >= 0) {
+							fluxVal += ((spectrum[i] - lastSpectrum[i])) < 0
+									? 0 : (spectrum[i] - lastSpectrum[i]);
+						} else {
+							fluxVal += ((spectrum[i] - lastSpectrum[i])) < 0
+									? 0 : (spectrum[i] - lastSpectrum[i]);
+						}
 					}
 					bassSpectralFlux.add(fluxVal);
 					
diff --git a/core/src/zero1hd/polyjet/audio/map/RhythmMapAlgorithm.java b/core/src/zero1hd/polyjet/audio/map/RhythmMapAlgorithm.java
index 2a317aa..c7409a3 100755
--- a/core/src/zero1hd/polyjet/audio/map/RhythmMapAlgorithm.java
+++ b/core/src/zero1hd/polyjet/audio/map/RhythmMapAlgorithm.java
@@ -55,7 +55,7 @@ public class RhythmMapAlgorithm implements Runnable {
 				int warningTime = (int) ((3/speedMod)*windowPerSecond);
 				if ((index+warningTime <= bassPeaks.size) && bassPeaks.get(index + warningTime) >= avgBass) {
 					//TODO basic void circle spawning
-					float endRadius = overlappedPeaks.get(index + warningTime)*Polyjet.GAME_AREA_HEIGHT;
+					float endRadius = overlappedPeaks.get(index + warningTime)*Polyjet.GAME_AREA_HEIGHT/4;
 					
 					map.addToMap(Entities.VOID_CIRCLE, 
 							endRadius, 
@@ -77,8 +77,6 @@ public class RhythmMapAlgorithm implements Runnable {
 								Polyjet.GAME_AREA_HEIGHT-0.25f, 
 								180*rand.nextFloat()+90, 
 								speedMod*(1f/avgBPS));
-						
-						
 					}
 				}