The YM2414, a.k.a. 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 it, and was named after), 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:
- Eight concurrent FM channels
- Four operators per channel
- Eight selectable waveforms
- Fixed-frequency mode, which can go much lower in the OPZII, enabling 0 Hz carriers or low rates for native chorusing
- Dual low frequency oscillators
The chip was used in the Porta Tone PSR-80.
- "EEVblog #256 – Yamaha PSR-80 Keyboard Teardown". EEVBlog. Retrieved 26 February 2014.
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