BRAIDS /macro oscillator

Github - BOM

Features

Synthesis models

The classics

• CS-80 style sawtooth with a notch.
• Continuously variable morphing between triangle, sawtooth, square and pulse, with character control.
• Square/sawtooth with pulse width control.
• Triangle to sine morphing, with wavefolder.

Direct digital synthesis

• Band-limited dual pulse train, with detuning.
• Dual square or sawtooth oscillator with hard sync.
• Triple saw, square, triangle or sine.
• Stack of three ring-modulated sine waves.
• Swarm of seven sawtooth waves.
• Comb-filtered sawtooth wave
• Circuit-bent sawtooth generator with sample rate reduction and bit toggling.
• Direct synthesis of filtered waveforms, casio CZ style.
• Low-fi or hi-fi vowel/formant synthesis.
• Harmonic oscillator.
• FM with various feedback paths.

Physical and percussive models

• Plucked string (Karplus Strong).
• Bowed string.
• Reed and flute.
• Bell and metallic drum.
• 808 bass drum, cymbal noise and snare drum.

Wavetables

• 256 waveforms, organized as 21 wavetables or as a 16x16 XY map.
• 4-note chord synthesis.

Noise sources

• Noise processed by a tuned multimode filter.
• Noise processed by a dual BP filter.
• Clocked digital noise.
• Cloud of sinusoidal grains.
• Particle synthesis.

Additional settings

These settings are accessible through a menu, and are not CV controllable.

• Bit-depth (from 4 to 16 bits) and sample rate (from 4kHz to 96kHz).
• Quantizer on the CV-input with a large selection of scales.
• Analog VCO-style linear detuning of higher frequencies.
• Analog VCO-style pitch drifting.
• Waveform quirks, unique to each module built.
• Built-in AD envelope, assignable to the oscillator frequency, the COLOR and TIMBRE parameters, and to the amplitude.
• META mode enabling CV-controlled model selection with the FM input.

Specifications

• All inputs: 100k impedance, DC to 4kHz.
• 12-bit CV capture.
• 96kHz, 16-bit audio processing (some algorithms are 2x or 4x oversampled).

Code (AVR projects): GPL3.0.

Code (STM32F projects): MIT license.

Hardware: cc-by-sa-3.0

By: Emilie Gillet (emilie.o.gillet@gmail.com)