{"product_id":"msx-eq-psg-spectrolyzer-cartridge","title":"MSX-EQ PSG Spectrolyzer Cartridge","description":"\u003ch2\u003eWhat is it?\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eMSX-EQ PSG Spectrolyzer\u003c\/strong\u003e is a simple cartridge for the MSX platform that visualizes the spectrum of notes played by the programmable sound generator, such as the \u003cstrong\u003eAY-3-8910\u003c\/strong\u003e or \u003cstrong\u003eYM2149\u003c\/strong\u003e (PSG).\u003c\/p\u003e\u003cp\u003eThe cartridge board fits the standard MSX cartridge slot and shows the effect of measuring the signal's level — each reproduced frequency (or frequency range) corresponds to one of \u003cstrong\u003e9 vertical LED indicators\u003c\/strong\u003e.\u003c\/p\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eBased on the \u003cstrong\u003eAltera EPM7128 PLD\u003c\/strong\u003e (128 logical units), the cartridge intercepts PSG port I\/O, identifies the played note\/frequency, and displays its representation on dedicated LED indicators in real time. No special setup required — just install into any standard MSX slot with an unobstructed view of the LEDs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVisualizes notes\/frequencies in games and demos in real time\u003c\/li\u003e\n\u003cli\u003eLED indicators automatically switch off when a note fades out\u003c\/li\u003e\n\u003cli\u003eNo drivers or software needed\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eAssembly Options\u003c\/h2\u003e\u003cp\u003eThe cartridge can be assembled in two ways:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiscrete LED elements\u003c\/strong\u003e — simple, allows various color combinations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED bar assemblies\u003c\/strong\u003e — mostly single-colored, clean look\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTested color combinations: blue, red, green (single color), or blue+red \/ green+red (multi-color, red LEDs on top).\u003c\/p\u003e\u003ch2\u003eExternal Links\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/github.com\/RBSC\/MSX-EQ\" target=\"_blank\"\u003eGitHub: RBSC MSX-EQ\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.msx.org\/forum\/msx-talk\/trading-and-collecting\/wts-msx-eq-psg-spectrolyzer?page=1\" target=\"_blank\"\u003eMSX.org Forum: WTS MSX-EQ PSG Spectrolyzer\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Denjhang's Retro Hardware","offers":[{"title":"Default Title","offer_id":46113184809157,"sku":null,"price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/8507\/1813\/files\/2025-01-05T15_09_33.365Z-MSX-EQ_v3pcb.jpg?v=1776831802","url":"https:\/\/denjhang.myshopify.com\/products\/msx-eq-psg-spectrolyzer-cartridge","provider":"Denjhang's Retro Hardware","version":"1.0","type":"link"}