Infinite compression yielded constant output level regardless of input level changes dynamic reversal flipped the attack and decay of a sound, and could be used to make a voice track sound 'backwards'. This cool looking piece had unusual capabilities. Described as a 'compressor with attitude' by Eventide, the Omnipressor was a compressor, limiter, gate, expander, and more. The Model 2826 and Model 2830 Omnipressors, sold in early and mid 1970's, are favorites around our shop, though they are not widely known or well understood. From somewhere, our shop has two yellowed original blueprints of the schematic (quite informally drafted). In my opinion this was the first true outboard 'effects box'. And it was instant - you mounted it in a rack, no tape machines. Still, phasing is an intriguing effect, very similar to flanging. Because it is based on phase shift (capacitor based not time delay based), the peaks and notches are harmonically and acoustically unrelated, and less deep. Phasing sounds different than flanging (most would say inferior).

The Instant Phaser was the first outboard device to emulate tape flanging, an awkward process that required 2 tape machines. The Harmonizer was born, though it had not been named yet. (Those early versions used shift registers the later 1745M, the model usually seen, used RAM.) The optional pitch change module though it had no deglitch circuit, and thus had obvious artifacts, was also a important first. In 1971 the first products were released - the Eventide Clockworks PS-101 Instant Phaser (all analog), and the relatively rare 17A Digital Delays. Eventide Clockworks PS-101 Instant PhaserД®ventide's website says they began in the basement of a small New York small studio building tape machine locators, first for their own studio, and then for Ampex.

Eventide h910 output wiring