# Kasser Synths

> Kasser Synths is a family-run workshop in Spain that designs and hand-builds portable FM synthesizers with real Yamaha sound chips (no emulation). Each DAFM synth is made to order, sold assembled or as a DIY kit with the chip included, and plays over MIDI.

> ## Products
- [DAFM Genesis](https://kassersynths.com/dafm-genesis-ym2612-ym3438-synth/): FM synth with a real Yamaha YM2612 or YM3438, the SEGA Genesis / Mega Drive sound. MIDI, loads DefleMask DMP presets. Assembled or DIY kit.
- [DAFM Arcade](https://kassersynths.com/dafm-arcade-ym2151-synth/): FM synth with a real Yamaha YM2151 (OPM) and YM3012 DAC, the sound of 80s/90s arcade boards. MIDI CC, arcade presets. Assembled or DIY kit.
- [DAFM Blaster](https://kassersynths.com/dafm-blaster-ymf262-opl3-synth/): FM synth with a real Yamaha YMF262 (OPL3) and YAC512 DAC, the sound of 90s PC sound cards. MIDI, 128 General MIDI presets. Assembled or DIY kit.
- [All products](https://kassersynths.com/products/): overview and comparison of the DAFM line.
- [DAPSG](https://kassersynths.com/dapsg/): upcoming 8-bit console chip synth (four voices, square waves and noise), launching 7 December 2026.

## Where to buy
- [Tindie store](https://www.tindie.com/stores/kassersynths/): assembled synths and DIY kits, ships worldwide.
- [Perfect Circuit](https://www.perfectcircuit.com/kasser-synths-dafm-synth-arcade.html): US retailer.
- [Japan page](https://kassersynths.com/japan/): tracked shipping to Japan.

## Docs and support
- [Resources](https://kassersynths.com/resources/): manuals, quick-start guides, firmware, DIY build tips.
- [Contact](https://kassersynths.com/contact-us/)

## Guides
- [Real Yamaha FM chip vs emulation](https://kassersynths.com/real-yamaha-fm-chip-vs-emulation/)
- [YM2612 vs YM3438 and the ladder effect](https://kassersynths.com/ym2612-vs-ym3438-ladder-effect/)
- [YM2151 vs YM2612: arcade FM vs Mega Drive FM](https://kassersynths.com/ym2151-vs-ym2612-arcade-fm-vs-mega-drive-fm/)
- [Loading DefleMask DMP presets on a hardware YM2612](https://kassersynths.com/load-deflemask-dmp-presets-hardware-ym2612/)
- [The Yamaha YMF262 and 90s PC gaming sound](https://kassersynths.com/the-yamaha-ymf262-crafting-the-soundscape-of-90s-pc-gaming/)
- [History of Yamaha FM emulators](https://kassersynths.com/yamaha-fm-emulators-history/)
- [FM synthesis in the 80s and 90s](https://kassersynths.com/fm-synthesis-shaping-the-sound-of-the-80s-and-90s/)
- [Blog](https://kassersynths.com/blog/): FM synthesis, Yamaha chips and retro game music.