User Manual

Crumar Seven User s Manual '
CHAPTER 18. SOUNDS: ACOUSTIC GRAND PIANO.
The Crumar Seven also has a physical modeling simulation of an acoustic grand piano. This simulation doesn't point at a specific model,
but is based on a well known structure that is common to some of the most used, also most expensive, concert pianos. It consists of a
total of 243 strings, the first 8 notes (A to E) have only one round-wound string each, next 5 notes (F to A) have two round-wound
strings each, next 7 notes (A# to E) have three round-wound strings each, the remaining 68 notes (F to C) have three plain steel strings
each. The last 17 notes (G# to C) do not have dampers. The soundboard has what's known as the “Duplex Scale” that adds harmonics to
the sound of each single note. Many elements of this structure can be slightly modified to taste. The editing page of the Grand Piano
will look pretty much similar to that of the Electric Baby Grand, since both are basically acoustic pianos and have many elements in
common.
The parameters you find in the EDIT PIANO page are:
 HAMMER CUTOFF: Cutoff frequency of the low-pass filter applied to the hammers. Since this is a physical modeling instrument,
we're not talking about a filter applied to the whole sound, but only to a single element of the virtual piano. By increasing this
parameter you'll notice that the attack component will result brighter, even though this brightness is not always added to the
body of the decaying sound.
 HAMMER RESONANCE: Resonance amount of the low-pass filter applied to the hammers; will mostly affect bass notes, leaving
the treble notes almost unaltered.
 HAMMER OFFSET: This parameter adjusts the horizontal alignment of all hammers in relationship with the strings. In the center
position, all hammers are perfectly aligned; if the position is changed, the whole harmonic content of each note could change in
an unpredictable way. This greatly affects what's known as the “voicing” of a grand piano.
 HAMMER WIDTH: Set the size of the virtual hammers. A bigger size results in a fuller sound but will increase the volume and will
also alter the voicing; adjust this parameter in accordance to the previous parameter.
 HAMMER BODY: Adjusts the timbre of the hammer noises, by filtering some of the thump caused by the hammers.
Crumar Seven User's Manual - Page 32