diff --git a/shadermeh.c b/shadermeh.c
index dccc65b..f85b3f1 100644
--- a/shadermeh.c
+++ b/shadermeh.c
@@ -71,11 +71,12 @@ static const struct option long_opts[] = {
 	{ "width", required_argument, NULL, 'w' },
  	{ "height", required_argument, NULL, 'h' },
 	{ "shader", required_argument, NULL, 's' },
+	{ "sampling-rate", required_argument, NULL, 'r' },
 	{ "to-stdout", no_argument, NULL, 'S' },
 	{ NULL, 0, NULL, 0 },
 };
 
-static const char *short_opts = "w:h:s:S";
+static const char *short_opts = "w:h:s:S:r";
 
 static const char *usage_str =
 "shadermeh OPTIONS...\n"
@@ -90,6 +91,8 @@ static const char *usage_str =
 "  --shader, -s <shader file>\n"
 "\n";
 
+#define SND_BUFFER_SIZE   512
+
 int main(int argc, char **argv)
 {
 	GLuint u_iResolution, u_iTime, u_iTimeDelta, u_iFrame;
@@ -103,6 +106,9 @@ int main(int argc, char **argv)
 	bool to_stdout = false;
 	window *wnd;
 	int i;
+	unsigned int sampling_rate = 0;
+	float in_samples[SND_BUFFER_SIZE];   /* Raw input floats from -1...1 */
+	float norm_samples[SND_BUFFER_SIZE]; /* Normalized samples from 0...1 */
 
 	/******************** parse options ************************/
 	width = 800;
@@ -123,6 +129,9 @@ int main(int argc, char **argv)
 		case 's':
 			shader_file = optarg;
 			break;
+		case 'r':
+			sampling_rate = strtol(optarg, NULL, 10);
+			break;
 		case 'S':
 			to_stdout = true;
 			break;