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All Projects → keshikan → CureSynth_Whip

keshikan / CureSynth_Whip

Licence: GPL-3.0 license
Polyphonic MIDI Synthesizer for STM32F7

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midistm32synthesizerstm32f7stm32f765

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MIDI Synthesizer for STM32F7 "CureSynth Whip"

Overview

This repository shows STM32F7 (ARM Cortex-M7) based polyphonic MIDI synthesizer "CureSynth Whip", which is GM1(General MIDI Level 1) nearly compatible. It can generate sound about 128 Instruments and 1 Drum set. Delay, LPF/HPF, Distortion effects are available for each part.

STM32F7を使用した、16パートのマルチティンバーMIDI音源「CureSynth Whip」です。シンセサイザー部はGM1規格に(ほぼ)対応しており、メロディ128音色、ドラムセット1種のパッチリストを搭載しています。各パートに対し、ディレイ・LPF/HPF・ディストーションを掛けることができます。

Sample Image

Specifications

Hardware spec

  • MCU: STM32F765VIT6 / ARM Cortex-M7 (STMicroelectronics)
  • DAC: PCM5102A (Texas Instruments)
  • Display: 128*64 SH1106 OLED Module (No brand, bought from AliExpress)

Synthesizer spec

  • Sound generation: One oscillator(sin, saw, square, triangle, noise) + one ring-modulator
  • Max polyphony: 36
  • Number of channels: 16 (one MIDI-IN)
  • Output: 16bit, 32kHz
  • Effects: Delay, LPF/HPF, Distortion, Sweep(Up, Down)
  • Format: General MIDI 1, Original format

Building Information

Making hardware

See Schematic.

Building software

Install SW4STM32(need registration), import Project files, and build.
In addition, use this binary file for STM32F765.

Notice: Use gcc optimization flag "-O3".

File Location

Memos for Development (written in Japanese)

References

MIDI specification

Synthesizer programming

Digital filter programming

SIMD of STM32

Hardware

Author

(c) 2017 Keshikan ( Website, Twitter )

License

Source codes and schematic are licensed under GPLv3 unless otherwise specified.

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