/******************************************************************************
 * DreamMaker FX / www.dreammakerfx.com
 *****************************************************************************/
/*
Effect name: Momentary Delay 

Effect description:  This is an example that shows how to use the fx_delay
effect to create a delay effect that can be activated with momentarily with a 
footswitch like in dub songs.  Regular music and then you hold down the left
footswitch and things will be delayed.  Release the footswitch but the delays
still ring out.

Left pot label: Feedback 
Left pot function: Basically how long the echo lasts before dying out

Center pot label: Delay time
Center pot function: How far apart the echos are (0.1 to 3 seconds)

Right pot label: Wet/dry mix 
Right pot function: The mix of clean audio and the echo effect.  All the way left 
is no effect at all and all the way right is effect only with none of the original 
dry signal.  Right in the middle (12:00) is a nice mix of the original dry signal
and the echo signal

Left footswitch label: Bypass
Left footswitch function: Bypasses the effect

Right footswitch label: Tap delay
Right footswitch function: Tap it a few times at a set interval and the delay will lock on

Youtube Url:
Soundcloud Url:

Created by: DreamMaker
DreamMakerFx package version: 1.5.3
Sketch version: 1.0
*/  
#include <dreammakerfx.h>

/**
 To create the momentary effect, we're going to gate the audio going into the delay effect
 so we can mix audio through the delay when the pedal is pressed, and turn off audio
 flowing into the delay when the pedal is released.  The output of the delay is mixed
 with clean audio so we can still hear the delays "ring out" after we release the momentary
 switch.

 
        When footswitch is pressed
        gain is set to 1.0 (on), otherwise
        it is set to 0.0 (off)

                  +---------+       +----------------+      +-------+
                  |         |       |                |      |       |
 Instr In +------>+  Gain   +------>+  Delay effect  +----->+       |   +-----> Amp out
             |    |         |       |                |      |       |   |
             |    +---------+       +----------------+      | Mix 2 +---+
             |                                              |       |
             |                                      +------>+       |
             |                                      |       |       |
             +--------------------------------------+       +-------+


    Created with http://asciiflow.com/  

 */
fx_delay    my_delay(1000.0,    // Initial delay is 1000ms
                     3000.0,    // Max delay is 3000ms
                     0.7,       // Feedback 
                     0.0,       // Clean mix
                     1.0,       // Delay / wet mix
                     false);    // Do not fx send/receive loop

fx_gain     delay_mix(0.0);
fx_mixer_2  mix2;

void setup() {
  // put your setup code here, to run once:

  // Initialize the pedal!
  pedal.init();

  // Route audio from instrument -> my_delay -> amp
  pedal.route_audio(pedal.instr_in, mix2.input_1);
  pedal.route_audio(pedal.instr_in, delay_mix.input);
  pedal.route_audio(delay_mix.output, my_delay.input);
  pedal.route_audio(my_delay.output, mix2.input_2);
  pedal.route_audio(mix2.output, pedal.amp_out);

  // Right foot switch is tap delay length
  pedal.add_tap_interval_button(FOOTSWITCH_RIGHT, true);

  pedal.run();
}

void loop() {

  if (pedal.button_pressed(FOOTSWITCH_LEFT, true)) {
    delay_mix.set_gain(1.0);
  }
  if (pedal.button_released(FOOTSWITCH_LEFT, true)) {
    delay_mix.set_gain(0.0);
  }

  // If new delay time has been tapped in, use that
  if (pedal.new_tap_interval()) { 
    my_delay.set_length_ms(pedal.get_tap_interval_ms());
  } 

  // Left pot changes the feedback of the delay (determining how long the echoes last)
  if (pedal.pot_left.has_changed()) {
    my_delay.set_feedback(pedal.pot_left.val);
  }
  
  // Right pot changes the wet / dry mix
  if (pedal.pot_right.has_changed()) {
    my_delay.set_dry_mix(1.0 - pedal.pot_right.val);
    my_delay.set_wet_mix(pedal.pot_right.val);
  }  
  
  // Center pot can also be used to change the delay length 
  // from 100ms to 3000ms
  if (pedal.pot_center.has_changed()) {
    float new_length_ms = 100.0 + pedal.pot_center.val*2900.0;
    my_delay.set_length_ms(new_length_ms);
    pedal.set_tap_blink_rate_ms(new_length_ms);
  }    
  
  // Service pedal
  pedal.service();
}