Sound cards and semiconductors
In 1986, after making an agreement with Apple Computer, the same ES5503 DOC (Digital Oscillator Chip, marketed as "Q-Chip") used in the Mirage sampler (DSK-8, DSK-1, DMS-1), ESQ-1, ESQ-M and SQ-80 synthesizers, and SDP-1 piano module, was incorporated into the Apple II GS personal computer.
Later engines, with 16-bit sample playback and internal digital filters, were ES5504 DOC-II (used in the EPS sampler) and ES5505 OTIS (used in the EPS16+ sampler and the VFX line of synthesizers featuring 21 voices). Finally, ES5506 OTTO drove all subsequent 32-voice machines (SD-1/32, TS10/12, ASR-10/88) and the dual-OTTO machines (KT, MR, ZR). The latest incarnation, ES5548 OTTO-48, was used in the final line of Ensoniq studio products (ASR-X, FIZMO).
Ensoniq also developed an effects DSP, ES5510 ESP, that was used in the machines from VFX on and the standalone FX units DP/2 and DP/4. OTTO-48 generation uses its greatly enhanced successor, ES5511 ESP V2. A combination of OTTO and ESP, ES5540 OTTOFX, was also developed and sold.
The Ensoniq ES5505 OTIS/OTISR2, and ES5510 ESP (Ensoniq Signal Processor) were also used in various arcade games. They were all manufactured on the CMOS process. OTTO was licensed to Advanced Gravis for use in the Gravis Ultrasound card. In 1994, production began on PC sound cards for home computers. The design of the video-game console Atari Panther also included the OTIS chip, though the product never reached series production. A dedicated version of OTTO, ES5530/35 OPUS, was developed for AT-bus sound cards, featuring built-in joystick and CD-ROM interface.
Ensoniq's sound cards were popular and shipped with many IBM PC compatibles. Many games in the late MS-DOS era supported the Ensoniq Soundscape either directly or through General MIDI. In addition, Ensoniq devised an ISA software audio emulation solution for their new PCI sound cards that was compatible with most contemporary IBM PC games. It is speculated that this was an important factor in Creative Lab's acquisition of Ensoniq, because Creative/E-MU was struggling with legacy compatibility at the time with their higher-performance PCI audio solutions.
Soundscape
- Ensoniq Soundscape S-2000 The original Soundscape was Ensoniq's first direct foray into the PC sound card market. It was a full-length ISA digital audio and 'wavetable' sample-based synthesis audio card, equipped with a 2 MB Ensoniq-built ROM-based patch set.
- Ensoniq SoundscapeDB The SSDB was a 'wavetable' daughterboard (sample-based synthesis daughterboard) upgrade for PCs with a sound card bearing a Wave Blaster-compatible connector. It was based upon the S-2000 chipset but was without the digital sound effects section or any DAC. The SSDB would use the host sound card for final output.
- Ensoniq Soundscape Elite was Ensoniq's high-end ISA offering. It offered the highest MIDI quality of any PC sound card they ever made, including the newer AudioPCI. The Elite was based mostly around the S-2000, with some additional features that set it far apart from its progenitor.
- Ensoniq Soundscape OPUS This card was a Gateway 2000 OEM, and possibly was used by other OEMs, but was never sold to Ensoniq's customers directly. It was a Soundscape-like board, using the Ensoniq 5530/5535 OPUS multimedia sound chip, a chip that was only used on these OEM boards and essentially comprises an OTTO with back-then usual additional interfacing (Joystick, CD-ROM).