Yamaha YM2414

OPZ, is an eight-channel sound chip developed by Yamaha.

It was used in many mid-market phase/frequency modulation-based synthesizers, including Yamaha's TX81Z (the first product to feature the chip and was named after it), DX11, YS200 family, the Korg Z3 guitar synthesizer, and many other devices.

A successor was released as the upgraded OPZII/YM2424, used only in the Yamaha V50.

The OPZ has the following features: The chip was used in the PortaTone PSR-80 and PSR-6300[1], the Yamaha TX81Z rack-mounted FM synthesizer, the Yamaha DX11, DSR1000 and 2000, YS100, YS200 and DS55 synthesizers, the TQ5 Tone Generator and the Yamaha EMT-1 half-rack FM Sound Expander module.

Its upgraded variant, the YM2424 (OPZII), was used exclusively in the Yamaha V50 music workstation.