diff --git a/shaders/tag.vs b/shaders/tag.vs
index 18bdf67..34db6b7 100644
--- a/shaders/tag.vs
+++ b/shaders/tag.vs
@@ -13,13 +13,14 @@ uniform mat4 proj, model, view;
 
 uniform vec4 lumPos;
 uniform float phase;
+uniform float averageMusic;
 
 void main(void) {
   mat4 N = transpose(inverse(view * model));
   vsoNormal = normalize((N * vec4(vsiNormal, 0)).xyz);
   vec4 lumPosv = view * lumPos;
 
-  float dist = length(vsiPosition.xz), freq = 5, amplitude = 0.1 * (sqrt(2.) - dist);
+  float dist = length(vsiPosition.xz), freq = 5, amplitude = averageMusic * (sqrt(2.) - dist);
   float y = amplitude * cos(phase + freq * dist);
   vec3 p = vec3(vsiPosition.x, y, vsiPosition.z);
 
diff --git a/src/tag.c b/src/tag.c
index 347284f..1032510 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -90,6 +90,8 @@ static void draw(void) {
   glBindTexture(GL_TEXTURE_2D, _texId[0]);
   glUniform1f(glGetUniformLocation(_pId, "phase"), 0);
   glUniform4fv(glGetUniformLocation(_pId, "lumPos"), 1, lum_pos);
+  glUniform1f(glGetUniformLocation(_pId, "averageMusic"),
+              (float)averageMusic() * 5);
 
   glActiveTexture(GL_TEXTURE1);
   glBindTexture(GL_TEXTURE_2D, _texId[1]);