Add base for InterpolatingLookup

code/daisy-looper/daisy-looper.ino

@@ -125,6 +125,7 @@ void AudioCallback(float **in, float **out, size_t size) {
     input_envelope_follower.Process(in[1][i]);
 
     // Process the Looper
+    // TODO: Add Saturating function here
     looper_out = looper.Process();
 
     // Mix the dry/Wet of the looper