aehare70/adsr

ADSR based on lookup table for Arduino Due (and other Arduinos)

ADSR

ADSR based on lookup table for Arduino Due (and other Arduinos). Advantages of this implementation are that it is extremely light-weight, has a differential profile and that the attack, decay and release times can be precisely controlled.

See as well my youtube video on how to use this class: https://youtu.be/oMxui9rar9M

Installation

1. Make a new folder called "adsr" in your arduino libraries folder
2. Copy adsr.cpp and adsr.h into the "adsr" folder

How to use

Please refer to the ADSR_example.ino file in the examples folder. This file is written for the Arduino Due and can be run on other Arduino boards with some small modifications. I used the Due as it has a built-in DAC. NOTE: you can change the shape of the ADSR by changing the ATTACK_ALPHA and ATTACK_DECAY_RELEASE parameters in adsr.h

Updates

• 29.12.2020: fixed issue for very long delay times (conversion to float was needed). Delays up to 20s verified.
• 14.08.2022: added a function setResetAttack(bool l_reset_attack); -> By setting the reset attack to true (default is false) the ADSR will always start at 0 when a new trigger is received. In the default setting a new trigger starts at the current output value.

Have fun ;-)

mo thunderz