# HG changeset patch
# User Robert Jack <robert.h.jack@gmail.com>
# Date 1466771769 -3600
# Node ID a11814e864a872a525b7444f12e131efe8d0e7c5
# Parent  cdabbaf3a25201bc039a460dd83e189fc8dd1a54
Tremolo updated

diff -r cdabbaf3a252 -r a11814e864a8 examples/04-Audio/tremolo/render.cpp
--- a/examples/04-Audio/tremolo/render.cpp	Fri Jun 24 13:32:07 2016 +0100
+++ b/examples/04-Audio/tremolo/render.cpp	Fri Jun 24 13:36:09 2016 +0100
@@ -30,6 +30,12 @@
 
 bool setup(BelaContext *context, void *userData)
 {
+	// Check that we have the same number of inputs and outputs.
+	if(context->audioInChannels != context->audioOutChannels ||
+			context->analogInChannels != context-> analogOutChannels){
+		printf("Error: for this project, you need the same number of input and output channels.\n");
+		return false;
+	}
 
 	gInverseSampleRate = 1.0 / context->audioSampleRate;
 	gPhase = 0.0;
@@ -50,7 +56,7 @@
 		if(gPhase > 2.0 * M_PI)
 			gPhase -= 2.0 * M_PI;
 
-		for(unsigned int channel = 0; channel < context->audioChannels; channel++) {
+		for(unsigned int channel = 0; channel < context->audioOutChannels; channel++) {
 			// Read the audio input and half the amplitude
 			float input = audioRead(context, n, channel) * 0.5;
 			// Write to audio output the audio input multiplied by the sinewave
@@ -60,7 +66,7 @@
 	
 	// Nested for loops for analog channels
 	for(unsigned int n = 0; n < context->analogFrames; n++) {
-		for(unsigned int ch = 0; ch < context->analogChannels; ch++) {
+		for(unsigned int ch = 0; ch < context->analogOutChannels; ch++) {
 			// Read analog channel 0 and map the range from 0-1 to 0.25-20
 			// use this to set the value of gFrequency
 			gFrequency = map(analogRead(context, n, 0), 0.0, 1.0, 0.25, 20.0);