Kurzweil Forte Manual page 123

Program Edit Mode
The LAYER Page
The String Resonance parameter works in conjunction with the FX preset "600 String
Resonance" to emulate the sound of strings resonating in an acoustic piano. When
combined, these two components create KSR (Kurzweil String Resonance). Factory programs
in the Piano category are set up to use KSR, and they provide a good example of how the
two components should be used. When making your own program with KSR, it may be
easiest to use an FX Chain from one of these programs, since they already contain controller
assignments for KSR. In these Programs and Chains the dry/wet mix of the KSR effect can
be controlled with slider F, and the effect can be enabled or disabled with assignable switch
2. When making your own Chain, the FX preset "600 String Resonance" should be used for
the first box of the Program's insert Chain.
When a layer has the String Resonance parameter set to On, the FX preset "600 String
Resonance" monitors which keys are being held on that layer and uses them to tune the
algorithm in the FX preset. Any audio that passes though the FX preset while these keys are
held will cause emulated strings to resonate based on this tuning. When using KSR, layers
which contain samples of piano notes should have the String Resonance parameter set to
On. Layers that do not play samples of piano notes (such as layers for mechanical key release
noise, pedal noise, string/synth layers etc) should have the String Resonance parameter set
to Off. (Layers set to Off will still resonate any other strings that have been emulated.) If
more than one layer in a program is set to play piano notes for the exact same velocity and
key range, the FX preset will function the best if only one of those layers has the String
Resonance parameter set to On.
In an acoustic piano, it is possible to strike and hold a key very lightly so that a note is not
played, but the key's strings will still become undamped and will resonate when other keys
are played. KSR can simulate this behavior. To do so, select the layer in the program which
has the lowest velocity range and which has the String Resonance parameter set to On. On
the Layer page, set the Enable parameter to GAttVel, and set the Enable Min parameter to
2. This will allow notes played with a velocity of 1 to tune the algorithm in FX preset "600
String Resonance" without playing a note. (This only works for velocities of 1. Velocities
above 1 will not tune the algorithm without playing a note, even if the Enable Min
parameter is set to a higher value.)
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