Color and Alpha in glsl shader instead Gem object

Deleted old audio files

puredata/glsl/gain.frag

@@ -0,0 +1,21 @@
+#extension GL_ARB_texture_rectangle : enable
+
+uniform sampler2DRect MyTex; 
+
+uniform vec4 gain;
+
+void main(void)
+{
+
+vec2 pos = (gl_TextureMatrix[0] * gl_TexCoord[0]).st;
+vec4 color_old = texture2DRect(MyTex, vec2(pos.x, pos.y));
+vec4 color_new = color_old;
+
+color_new.r = clamp(gain.r * color_old.r, 0., 1.);
+color_new.g = clamp(gain.g * color_old.g, 0., 1.);
+color_new.b = clamp(gain.b * color_old.b, 0., 1.);
+color_new.a = clamp(gain.a * color_old.a, 0., 1.);
+
+gl_FragColor = color_new;
+
+}