Eventide DSP 4000 Digital Ultra Harmonizer

The Eventide DSP 4000 Digital Ultra Harmonizer, released in 1994, is a programmable multi-effects processor. It was designed for use in professional studios and had a lasting impact on the world of studio and sound design. It is a programmable digital audio signal processor with a pitch-shifting function. The unit features 18-bit A/D and D/A converters and supports sample rates from 44.1 kHz up to 96 kHz. It incorporates the Algorithm Construction Kit (ACK). Using the graphical editor and the VSIGfile PC software, users can build their own algorithms from 200 internal function blocks – oscillators, filters, delay and pitch shifters. It allows diatonic pitch shifting with up to 4 voices at 48 kHz. It contains around 500 factory presets. It features balanced XLR analogue inputs and outputs (+4 dBu) as well as digital interfaces via AES/EBU and S/PDIF.