{"product_id":"ymf276-megamod-opn2-with-external-16-bit-dac","title":"YMF276 MegaMod - OPN2 with External 16-bit DAC","description":"\u003ch2\u003eWhat is it?\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eYMF276 MegaMod\u003c\/strong\u003e is an OPN2-compatible FM sound module built around the \u003cstrong\u003eYMF276\u003c\/strong\u003e chip — Yamaha's OPN2C-L, an upgraded CMOS-process successor to the classic YM2612\/YM3438. Unlike its predecessors, the YMF276 supports a universal \u003cstrong\u003eI2S external 16-bit audio DAC\u003c\/strong\u003e, delivering dramatically improved sound quality over the original 9-bit internal DAC found in OPN2\/OPN2C chips.\u003c\/p\u003e\u003cp\u003eDesigned as a drop-in compatible module for OPN2 sockets, it can be directly plugged in without any identification bit modification, and also supports Mega Drive\/Genesis music playback alongside the SN76489.\u003c\/p\u003e\u003ch2\u003eWhy Was It Made?\u003c\/h2\u003e\u003cp\u003eAfter acquiring hundreds of YMF276 chips in 2021, a dedicated piece of hardware was needed to properly test and utilize them. The YMF276 MegaMod became the earliest MegaMod design — born out of necessity, refined through experience. Its direct OPN2 socket compatibility made it an instant favorite for Mega Drive music enthusiasts.\u003c\/p\u003e\u003ch2\u003eWhat Makes It Special?\u003c\/h2\u003e\u003cp\u003eThe latest version incorporates a proven \u003cstrong\u003eI2S audio shifter\u003c\/strong\u003e that enables lossless digital volume amplification. This solves a long-standing problem with OPN2\/OPN2C chips: their built-in 9-bit DAC produces audible step noise at low volumes, making FM Towns music — which is often recorded at much lower levels than MD\/Genesis — sound poor when played through a YM2612 or YM3438.\u003c\/p\u003e\u003cp\u003eWith the YMF276 and its 16-bit external DAC, this problem is completely eliminated. You get clean, full-dynamic-range audio at any volume level.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eYMF276 (OPN2C-L) — CMOS upgraded successor to YM2612\/YM3438\u003c\/li\u003e\n\u003cli\u003eExternal I2S 16-bit DAC for lossless, high-quality audio output\u003c\/li\u003e\n\u003cli\u003eI2S audio shifter for lossless digital volume amplification\u003c\/li\u003e\n\u003cli\u003eDirect drop-in compatible with OPN2 sockets — no identification bit required\u003c\/li\u003e\n\u003cli\u003eSupports Mega Drive\/Genesis music playback with SN76489\u003c\/li\u003e\n\u003cli\u003eEliminates step noise issues present in 9-bit OPN2\/OPN2C DACs\u003c\/li\u003e\n\u003cli\u003eIdeal for FM Towns, Mega Drive, and OPN2-based music playback\u003c\/li\u003e\n\u003cli\u003eOpen source hardware — schematics available on GitHub\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Systems\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMega Drive \/ Genesis (OPN2 socket drop-in)\u003c\/li\u003e\n\u003cli\u003eFM Towns (via SPFM\/MegaMod host)\u003c\/li\u003e\n\u003cli\u003eAny OPN2-compatible SPFM host board\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eOpen Source\u003c\/h2\u003e\u003cp\u003eThe full hardware design is open source and available on GitHub: \u003ca href=\"https:\/\/github.com\/denjhang\/YMF276-MegaMod-2023\"\u003egithub.com\/denjhang\/YMF276-MegaMod-2023\u003c\/a\u003e\u003c\/p\u003e","brand":"Denjhang's Retro Hardware","offers":[{"title":"Default Title","offer_id":46136910446789,"sku":null,"price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/8507\/1813\/files\/2025-06-03T13_06_53.320Z-FBC68B061834D5B4587C31A7492A3BDA.jpg?v=1777379470","url":"https:\/\/denjhang.myshopify.com\/products\/ymf276-megamod-opn2-with-external-16-bit-dac","provider":"Denjhang's Retro Hardware","version":"1.0","type":"link"}