Open.Theremin V3.1 control software

Arduino UNO Software for the Open.Theremin

Changes since V3.0 (all by @Theremingenieur):

1. Fix a wavetable addressing issue (found by @miguelfreitas)
2. Use the Arduino's hardware SPI to control the DACS and use the Latch signal to reduce audio jitter
3. Improve the register switch to transpose by clean octaves and keep the tone spacing and pitch tuning consistent
4. Improve the volume response to give a smoother start and wider dynamics (*)

(*) This relies on a recent gcc compiler version. Make sure to compile it with the Arduino IDE >= 1.8.10

Don't click on the files!

Click on the "Download ZIP" Button to the right or Click here Then unpack the archive.

Open Source Theremin based on the Arduino Platform

Open.Theremin is an arduino shield to build the legendary music instrument invented by Leon Theremin back in 1920. The theremin is played with two antennas, one to control the pitch and one for volume. The electronic shield with two ports to connect those antennas comprises two heterodyne oscillators to measure the distance of the hand to the antenna when playing the instrument. The resulting signal is fed into the arduino. After linearization and filtering the arduino generates the instruments sound that is then played through a high quality digital analog audio converter on the board. The characteristics of the sound can be determined by a wave table on the arduino.

For more info on the open source project and on availability of ready made shield see:

http://www.gaudi.ch/OpenTheremin/

Installation

1. Open up the Arduino IDE
2. Open the File "Open_Theremin_V3.ino"
3. Selecting the correct usb port on Tools -> Serial Port
4. Select the correct arduino board from Tools -> Board
5. Upload the code by clicking on the upload button.

LICENSE

Written by Urs Gaudenz, GaudiLabs, 2016 GNU license, check LICENSE file for more information All text above must be included in any redistribution