| Mozzi version v1.1.0 sound synthesis library for Arduino |

09.Delays/ReverbTank_STANDARD/ReverbTank_STANDARD.ino

This example demonstrates the ReverbTank class.

/* Example of reverb on a synthesised sound
using Mozzi sonification library.
Demonstrates ReverbTank, a reverb small enough to fit on
the Arduino Nano, which for some reason wasn't able to fit a larger version
which did fit on other 328 based boards.
It's a pretty horrible reverb which sounds like the inside of a tin can.
For simplicity, ReverbTank has hardcoded maximum delay sizes
but also has default delay times which can be changed in the constructor
or by setting during run time to allow live tweaking.
The synthesised sound comes from the phasemod synth example.
Circuit: Audio output on digital pin 9 for STANDARD output on a Uno or similar, or
see the readme.md file for others.
Mozzi documentation/API
https://sensorium.github.io/Mozzi/doc/html/index.html
Mozzi help/discussion/announcements:
https://groups.google.com/forum/#!forum/mozzi-users
Tim Barrass 2013, CC by-nc-sa.
*/
#include <MozziGuts.h>
#include <ReverbTank.h>
#include <Oscil.h>
#include <tables/cos8192_int8.h>
#include <tables/envelop2048_uint8.h>
ReverbTank reverb;
#define CONTROL_RATE 640 // quite fast, keeps modulation smooth
// Synth from PhaseMod_Envelope example
Oscil <COS8192_NUM_CELLS, AUDIO_RATE> aCarrier(COS8192_DATA);
Oscil <COS8192_NUM_CELLS, AUDIO_RATE> aModulator(COS8192_DATA);
Oscil <COS8192_NUM_CELLS, AUDIO_RATE> aModWidth(COS8192_DATA);
Oscil <COS8192_NUM_CELLS, CONTROL_RATE> kModFreq1(COS8192_DATA);
Oscil <COS8192_NUM_CELLS, CONTROL_RATE> kModFreq2(COS8192_DATA);
Oscil <ENVELOP2048_NUM_CELLS, AUDIO_RATE> aEnvelop(ENVELOP2048_DATA);
void setup(){
// synth params
aCarrier.setFreq(55);
kModFreq1.setFreq(3.98f);
kModFreq2.setFreq(3.31757f);
aModWidth.setFreq(2.52434f);
aEnvelop.setFreq(9.0f);
startMozzi(CONTROL_RATE);
}
void updateControl(){
// synth control
aModulator.setFreq(277.0f + 0.4313f*kModFreq1.next() + kModFreq2.next());
}
AudioOutput_t updateAudio(){
int synth = aCarrier.phMod((int)aModulator.next()*(150u+aModWidth.next()));
synth *= (byte)aEnvelop.next();
synth >>= 8;
// here's the reverb
int arev = reverb.next(synth);
// add the dry and wet signals
return MonoOutput::fromAlmostNBit(9, synth + (arev>>3));
}
void loop(){
audioHook();
}