Description

This sound synthesizer kit is based on the Direct Digital Synthesis (DDS) method implement on an ATmega328 microcontroller (the same that's used in the Arduino Uno R3). The kit was originally designed by Human Hard Drive (Sam Stratter), and it was inspired by the DDS signal generator described by Martin Nawrath (Academy of Media Arts Cologne).

A nice introduction to the DDS method can be found in the article MT-085: Fundamentals of Direct Digital Synthesis (DDS) published by Analog Devices.

Features

• Dual oscillators
• 6 wave forms (Sin, Triangle, Left Saw, Right Saw, Square, and Flat)
• Noise setting on the main oscillator
• Adjustable (weighed) mixing of the two oscillators
• Adjustable cents, semitone, and octave for the second oscillator
• Low Frequency Oscillation (LFO) from 0 to 100Hz
• Routing the LFO to semitone, cents and octave control of the second oscillator
• 20 note arpeggio feature with adjustable speed from 0 to 50Hz
• 5 banks for saving presets
• 3.5mm aux output with volume control
• LCD screen with backlight control (Nokia 5110)
• MIDI input for connecting a keyboard
• UART input for serial communication (e.g., using an FTDI breakout board)

Technical Details