{"product_id":"re2-ym2163-project-re-birth-2nd-sound-card","title":"RE2-YM2163 - Project RE:birth 2nd Sound Card","description":"\u003ch2\u003eDemo Video\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/www.youtube.com\/watch?v=2eTxLP8I1g4\"\u003eYouTube Demo\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eWhat is it?\u003c\/h2\u003e\u003cp\u003eProject RE-birth 2nd is the spiritual continuation of \u003ca href=\"https:\/\/web.archive.org\/web\/20210307031049\/ym2203.com\"\u003eProject RE-birth\u003c\/a\u003e — a legendary open hardware project dedicated to bringing classic FM sound chips back to life.\u003c\/p\u003e\u003cp\u003eIn 2021, for unknown reasons, the Japanese closed the ym2203.com website, deleted all public schematics, and stopped the distribution of all peripheral hardware. Even with money in hand, it became impossible to purchase any SPFM motherboard or rebirth module. This was deeply frustrating for enthusiasts worldwide.\u003c\/p\u003e\u003cp\u003eIn the absence of original hardware, I forked almost all RE-birth music modules to truly revive this project. My mission: make FM music chips available to people all over the world — no internal meetings, no mystery stores, no hunger marketing, just long-term stock and fair play for everyone.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eRE2-YM2163\u003c\/strong\u003e is a YM2163 sound card designed for the SPFM series, featuring the latest \u003cstrong\u003eYM2163_SPFM_Piano_MIDI_v10\u003c\/strong\u003e driver. The new version supports \u003cstrong\u003e4× YM2163\u003c\/strong\u003e simultaneously and features an optimized channel allocation algorithm for richer, more expressive polyphony.\u003c\/p\u003e\u003ch2\u003eAbout the YM2163 Chip\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eYM2163\u003c\/strong\u003e is a rare and fascinating Yamaha FM synthesis chip — a variant in the OPL family designed specifically for electronic piano and keyboard applications. Unlike the more common OPL2\/OPL3 chips used in PC sound cards, the YM2163 was targeted at dedicated musical instrument hardware, giving it a distinctive tonal character prized by FM synthesis enthusiasts.\u003c\/p\u003e\u003cp\u003eIts rarity makes it a collector's item, and the RE2-YM2163 is one of the very few ways to experience this chip in a modern, accessible SPFM-compatible format.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAuthentic YM2163 FM synthesis — rare OPL-family piano\/keyboard chip\u003c\/li\u003e\n\u003cli\u003eLatest \u003cstrong\u003eYM2163_SPFM_Piano_MIDI_v10\u003c\/strong\u003e firmware\u003c\/li\u003e\n\u003cli\u003eSupports up to \u003cstrong\u003e4× YM2163\u003c\/strong\u003e simultaneously for expanded polyphony\u003c\/li\u003e\n\u003cli\u003eOptimized channel allocation algorithm for intelligent voice management\u003c\/li\u003e\n\u003cli\u003eMIDI support — use as a hardware MIDI sound module\u003c\/li\u003e\n\u003cli\u003eCompatible with RE:birth bus standard\u003c\/li\u003e\n\u003cli\u003eWorks with SPFM Light, SPFM Lite, RESPFM, IAP-RESPFM and more\u003c\/li\u003e\n\u003cli\u003eClassic NE5532 dual op-amp for excellent audio output quality\u003c\/li\u003e\n\u003cli\u003eAdjustable volume control on-board\u003c\/li\u003e\n\u003cli\u003eExcellent digital-to-analog isolation for clean, noise-free sound\u003c\/li\u003e\n\u003cli\u003eStandardized RE:birth module form factor\u003c\/li\u003e\n\u003cli\u003eLong-term stock — always available, no artificial scarcity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Mainboards\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSPFM Light\u003c\/li\u003e\n\u003cli\u003eSPFM Lite (2 slots)\u003c\/li\u003e\n\u003cli\u003eRESPFM\u003c\/li\u003e\n\u003cli\u003eIAP-RESPFM (4 slots)\u003c\/li\u003e\n\u003cli\u003eSTM32-RESPFM (4 slots)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eYM2163 Virtual Piano v10 — Control Software\u003c\/h2\u003e\u003cp\u003eA high-performance, real-time control application for the RE:SPFM Quad YM2163 hardware platform. Built on the \u003cstrong\u003eDear ImGui\u003c\/strong\u003e immediate-mode GUI framework, the software provides comprehensive MIDI routing, intelligent voice allocation, adaptive dynamics processing, and hardware state visualization.\u003c\/p\u003e\u003ch3\u003eCore Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMIDI Input \u0026amp; Routing:\u003c\/strong\u003e USB MIDI, virtual MIDI cables, and Standard MIDI File (Format 0\/1) playback. Sub-millisecond latency with full CC support (sustain, volume, modulation, pitch bend)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Voice Allocation:\u003c\/strong\u003e 16 MIDI channels → 24 physical YM2163 channels across 4 slots. First-fit + priority-based voice stealing (age, velocity, envelope state). Per-slot enable\/disable, mute, solo, and hot-swap support\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdaptive Velocity Mapping:\u003c\/strong\u003e Continuous histogram analysis over 1024-event sliding window. Auto-adjusts attenuation mapping based on input dynamics — ensures optimal contrast regardless of source MIDI compression\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSynthesis Parameter Control:\u003c\/strong\u003e 5 timbres (Piano, Strings, Organ, Clarinet, Half-Coded), 4 envelope presets (Decay\/Fast\/Medium\/Slow), 3 pedal modes (Disabled\/Piano\/Organ), master volume, octave transpose (±2 oct), fine tuning (±100 cents)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal-Time Visualization:\u003c\/strong\u003e 61-key virtual keyboard with velocity color, per-slot channel activity, rhythm VU meters (BD\/HC\/SDN\/HHO\/HHD), envelope phase display, MIDI event log\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMIDI File Playback:\u003c\/strong\u003e Directory browser, playlist, auto-play, tempo override (25–200% BPM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration Management:\u003c\/strong\u003e JSON preset save\/load, hardware calibration, clock drift compensation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePerformance Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMIDI Input Latency:\u003c\/strong\u003e \u0026lt;1ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRegister Update Rate:\u003c\/strong\u003e 1000 updates\/second\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUI Refresh Rate:\u003c\/strong\u003e 60 FPS (vsync)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoice Allocation Time:\u003c\/strong\u003e \u0026lt;0.5ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Polyphony:\u003c\/strong\u003e 24 voices + 20 rhythm channels\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Stack\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGUI:\u003c\/strong\u003e Dear ImGui (immediate-mode, OpenGL 3.3 Core Profile)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMIDI Backend:\u003c\/strong\u003e Windows Multimedia API \/ ALSA \/ CoreMIDI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial:\u003c\/strong\u003e USB CDC, 115200 baud\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreading:\u003c\/strong\u003e Decoupled MIDI, hardware, and UI threads with lock-free queues\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Denjhang's Retro Hardware","offers":[{"title":"Default Title","offer_id":46179369320645,"sku":null,"price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/8507\/1813\/files\/04_ea53d66e-8fb9-4e1e-b408-57c8a7ca40d3.jpg?v=1778036241","url":"https:\/\/denjhang.myshopify.com\/products\/re2-ym2163-project-re-birth-2nd-sound-card","provider":"Denjhang's Retro Hardware","version":"1.0","type":"link"}