10.6

682Logic Pro Instruments
• Upper knob and field: Set 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, Vintage Electric Piano is tuned to an equal-tempered scale, with each
octave above (up) doubling the frequency.
Stretch tuning in acoustic instruments
The tones of upright pianos, and to a lesser extent grand pianos (due to their longer
strings), have inharmonicities in their harmonic structure. This also applies to other
stringed instruments, but it particularly affects pianos due to the length, density, and
tension of the strings. If a piano is perfectly tuned to equal temperament across the
keyboard range, the overtones of the low strings and the fundamentals of the high strings
sound out of tune with each other.
To circumvent this problem, piano tuners use a technique known as stretch tuning, in
which the high and low registers of the piano are tuned higher and lower, respectively. This
results in the harmonics of the low strings being in tune with the fundamental tones of the
upper strings. In essence, pianos are intentionally “out of tune” (from equal temperament),
so that the lower and upper registers sound in tune.
Electric pianos don’t have strings, so this inharmonic relationship doesn’t apply to Vintage
Electric Piano nor to the original instruments it emulates. The stretch feature was primarily
included for situations where you want to use Vintage Electric Piano alongside an acoustic
piano recording or performance.
Logic Pro Vintage Electric Piano extended
parameters
Click the disclosure triangle at the lower left of Vintage Electric Piano to show or hide the
extended parameters.
Extended parameters
• Delay PP slider and field: Drag to set the delay time (in milliseconds) when the keys are
struck pianissimo (PP-soft).
• Delay FF slider and field: Drag to set the delay time (in milliseconds) when the keys are
struck forte (FF-hard).
• Midi Mode pop-up menu: Determine how Vintage Electric Piano responds to MIDI
controllers. Choose from: Off, Modwheel to Tremolo, and Full Remote.