Using the EVP88 Stretch Parameters
The EVP88 is tuned to an equal-tempered scale. You can deviate from this, however, and stretch the tuning in the bass and treble ranges—much as you can do with acoustic pianos (especially upright pianos). You can also modulate the tuning of each note randomly.
Lower Stretch knob: Determines the amount of deviation from the equal-tempered scale—in the bass end of the sound. The higher the value, the farther down the low notes are tuned. At a setting of 0, the EVP88 is tuned to an equal-tempered scale, with each octave down halving the frequency.
Upper Stretch knob: Determines the amount of deviation from the equal-tempered scale-in the treble end of the sound. The higher the value, the farther up the high notes are tuned. At a setting of 0, the EVP88 is tuned to an equal-tempered scale, with each octave up doubling the frequency.
Warmth knob: Determines the amount of (random) deviation from an equal-tempered scale. Each note is slightly detuned from the next, adding life and richness to the sound (particularly when high Warmth values are selected).
Note: Use of both Warmth and Upper or Lower Stretch may result in a detuned sound that is quite similar to a heavy chorus effect. In some instances, this effect may be so extreme that the EVP88 sounds out of tune with the rest of your project.