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Frequency modulation synthesis (or FM synthesis) is a form of sound synthesis whereby the frequency of a waveform is changed by modulating its frequency with a modulator. The (instantaneous) frequency of an oscillator is altered in accordance with the amplitude of a modulating signal. [1] FM synthesis can create both harmonic and inharmonic sounds.
The Yamaha YMF278 or YMF278B, also known as the OPL4 (OPL is an acronym for FM Operator Type-L), is a sound chip that incorporates both FM synthesis and sample-based synthesis (often incorrectly called "wavetable synthesis") by Yamaha.
The unit also has a built-in effects unit with 31 different effects such as various types of reverb and delay. Most of the effects have configurable parameters. The unit is capable of only one effect at a time, shared both by the rhythm machine and the FM synthesis unit. The ratio of the processed and unprocessed sound in the output can be ...
The Yamaha FS1R is a sound synthesizer module, manufactured by the Yamaha Corporation from 1998 to 2000. Based on Formant synthesis , it also has FM synthesis capabilities similar to the DX range. Its editing involves 2,000+ parameters in any one 'performance', prompting the creation of a number of third party freeware programming applications.
The YM2612, a.k.a. OPN2, is a sound chip developed by Yamaha.It is a member of Yamaha's OPN family of FM synthesis chips, and is derived from the YM2203. [1]The YM2612 is a six-channel FM synthesizer used in several game and computer systems, most notably in Sega's Mega Drive/Genesis video game console [2] as well as Fujitsu's FM Towns computer series. [3]
For sound generation, the SCSP contains 32 sound generators which can function in either FM synthesis or PCM digital audio mode. The sound generation hardware is then fed into the FH-1 128-step sound effects Digital Signal Processor, which includes 16 sound effect presets. Finally each audio channel is mixed together, with fully configurable ...
An example of the considerable differences between OPL-3 FM synthesis and Creative CQM synthesis. 0:00 is OPL-3 FM, and 0:30 onward is CQM. Sound Blaster 16 cards sold separately feature a CT1747, a chip which has the discrete Yamaha YMF262 OPL-3 FM synthesizer integrated. Some post-1995 cards (notably the CT2910) feature the fully compatible ...
The FM modulation and demodulation process is identical in stereo and monaural processes. FM is commonly used at VHF radio frequencies for high-fidelity broadcasts of music and speech. In broadcast services, where audio fidelity is important, wideband FM is generally used. Analog TV sound is also broadcast using FM.
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