4位AVR合成器。方形、三角形或异或噪声。MIDI控制。影响.

Introduction 4bitsynth is a MIDI-controlled digital synthesizer that uses the Atmel AVR ATMega48. Inspired by the NES, the sound is 4-bit. The digital output is put through an R-2R resistor ladder to get the analog waveform. Demos Listen to ogg/mp3 demos of the synths in action Square Three duty cycles: 12.5%, 25%, 50% Volume decay (optional looping) Pitch sweep (up/down, optional looping) Standard Pitch bend Fine pitch bend Triangle One volume (uses up/down counter) Pitch sweep (up/down, optional looping) Standard pitch bend Fine pitch bend Noise Two modes: 93-bit and 32k (think NES) Volume decay (optional looping) Pitch sweep (up/down, optional looping) Standard pitch bend Fine pitch bend