Electronic Speech Systems (ESS) started in 1989, and are most famous for their AudioDrive chips, used in many sound cards. Most AudioDrive chips are Sound Blaster Pro-compatible. All cards post-ES688 got the very good sounding integrated FM synthesizer circuits called "ESFM". These were OPL3-compatible but developed in-house, with has 20 voices, 72 operators, and operated in two modes: Native and Legacy. In Native mode, ESFM allows more than six 4-operator FM voices to be mapped, potentially allowing for a significant increase in the complexity of tones generated. The drivers for Windows 9x incorporate their own custom instrument patches which make use of this extended mode. Conversely, Legacy mode provides full backward-compatibility with Yamaha's YMF262. ESFM's output in this mode is moderately faithful to the YMF262 overall, but some tones are rendered quite differently, resulting in unique distortions in the sound and music of some games. Many DOS gamers prefer the softer sound of the ESFM over Yamaha's original OPL3 output.
This card provides good sound in Windows, but the DOS drivers only allow for Sound Blaster Pro compatibility (8-bit stereo) and it has a lower sound quality than a real Sound Blaster Pro or the Pro Audio Spectrum.
es1989s sound driver for windows 7 32-bit 13
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