ENSONIQ ES-5506 - "OTTO"
32-Voice Wavetable Oscillator Chip
The ES 5506 OTTO chip is a sample playback synthesizer designed to play back digital recordings. It creates one or more complete musical instruments through onboard signal processing.
Unlike a CD player, which only plays back the signal as recorded, OTTO is capable of altering the pitch and timbre of a digital recording and operating with 32 channels (voices). Each channel provides independent control of pitch, volume, waveform, and filtering.
OTTO is a VLSI device designed in a 1.5 micron double-metal CMOS process. It contains approximately 80,000 transistors. The device is the fourth generation of audio technology from ENSONIQ. All calculations are made with at least 18-bit accuracy.
The major features of OTTO are:
Real time digital filters
32 independent voices
Loop start and stop positions for each voice
Bidirectional and reverse looping
68000 compatibility for asynchronous bus communication
Separate host and sound memory interface
6 channel stereo serial communication port
Programmable clocks for defining serial protocol
Internal volume multiplication and stereo panning
A to D input for pots and wheels
Hardware support for envelopes
Support for dual OTTO systems
Optional compressed data format for sample data
Up to 16 MHz operation
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