Product Overview – Unit Synth MIDI Audio Module The Unit Synth is a compact, high-performance MIDI audio synthesizer module engineered for embedded sound systems, electronic music production, and interactive audio applications. Powered by the advanced SAM2695 synthesizer chip, it supports the standard MIDI protocol via UART serial communication, enabling seamless integration with MIDI controllers and digital instruments. Designed for real-time audio synthesis, the Unit Synth delivers rich, multi-layered sound with multi-channel instrument output, customizable 4-band EQ, and immersive reverb effects. Its built-in NS4150B Class-D amplifier ensures crystal-clear audio performance with minimal power consumption. Whether you're building a DIY synthesizer, performing live electronic sets, or teaching sound design in a STEAM classroom, Unit Synth is your go-to module for professional-grade MIDI audio. Features of Unit Synth SAM2695 MIDI synthesizer chip for high-fidelity instrument sound generation UART serial communication for reliable MIDI data transmission Integrated NS4150B Class-D amplifier for efficient and clear audio output Full support for standard MIDI protocol ensures broad device compatibility Multi-channel instrument output for layered sound synthesis Customizable 4-band EQ, reverb, and other sound parameters Compatible with popular development platforms like Arduino, UIFlow, and more What’s in the Box Everything you need to get started with MIDI audio synthesis: 1 × Unit Synth module – compact and powerful MIDI sound engine 1 × HY2.0-4P Grove Cable (20cm) – for easy plug-and-play connectivity Recommended Applications The Unit Synth is ideal for a wide range of creative and educational scenarios: Live improvisational music performance – trigger real-time MIDI sounds on stage Professional music production and sound design – integrate into studio workflows Electronic music stage setups – build modular synth rigs or MIDI controllers STEAM and maker education projects – teach sound synthesis and embedded audio Technical Specifications Specification Details Audio Synth Chip SAM2695 Amplifier Chip NS4150B Audio Protocol MIDI Speaker Support 8Ω @ 1W Operating Temp. 0 ~ 40°C Product Size 48.0 × 24.0 × 16.0 mm Product Weight 10.1g Package Size 138.0 × 93.0 × 17.0 mm Gross Weight 15.4g Learning Resources How to connect Unit Synth with MIDI 5P-DIN interface Circuit Schematics Download Unit Synth Schematics (PDF) Pin Mapping Grove Port Configuration HY2.0-4P Black Red Yellow White PORT.C GND 5V UART_RX NC Module Dimensions Datasheets SAM2695 Chip Datasheet Software & Libraries Arduino Unit Synth Arduino Library UIFlow1 UIFlow1 Documentation UIFlow2 UIFlow2 Documentation Compatibility Unit Synth is compatible with a wide range of M5Stack cores including CoreS3, Core2, AtomS3, StickC, and more. It connects via PORT.C using UART protocol, making it easy to integrate into modular IoT and audio systems.
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