11.3

Table Of Contents
GRAIN SAMPLE MANIPULATOR214
Spectral Grains
The Spectral Grains playback algorithm uses FFT analysis to analyze the frequency content (partials) of the original
sample. You can then stretch the generated signal by pitch-shifting the partials, and also filter out inharmonic partials.
This way you could continuously transform inharmonic signals into harmonic signals, for example. You can also draw
your own formant curves in the spectrum display to give the sounds different pitches/characters.
•Snap
This pitch-shifts inharmonic partials towards the closest harmonic partials. At 0% the sound is almost unaffected
and at 100% the sound contains only harmonic partials.
Filter
Instead of pitch-shifting inharmonic partials towards harmonic ones, as the Snap control above does, the Filter
control filters out the inharmonic partials and keeps the harmonic ones. Since the filter slopes are not brickwall
shaped some of the inharmonic partials (if any) will remain audible even at 100%.
•FFT Size
This sets the accuracy (and speed) of the frequency analysis. “0” is the fastest detection, but this also leaves out
detection of low frequencies. “4” is the most accurate detection. However, it’s also slower since it also detects low-
frequency material (which takes longer to detect).
•Curve
With the Curve tool you can draw your own formant curves in the frequency spectrum. Drawing above the pink
area means the partials are amplified, and drawing below the pink area means the partials are attenuated.
•Amount
Set the gain/attenuation amount of the drawn formant curve (see “Curve” above). At 0% the curve is completely
flat.
•Formant
Sets the initial pitch of the sample, together with the Root Key setting (see “Root Key”). If Snap and Filter are both
set to 0%, the Root Key and Formant controls the pitch of the signal. This also means that the Pitch parameters
(see “Pitch controls”) and Pitch wheel (see “Pitch”) have no effect. To have the Formant track the keyboard in a
musical way, make sure the Formant Kbd parameter (see below) is set to 100%.
When you raise the Snap or Filter parameters towards 100% the sound gradually adapts to the Pitch settings in-
stead, and the Root Key and Formant parameters now affect the tone color instead.
•Formant Tune
Here you can fine-tune the formant curve to adjust the pitch to the Oscillator pitch (see “The Oscillator section”).
•Formant Kbd
Here you set how much you want the formant to track the keyboard. 0% means no keyboard tracking and 100%
means full 1:1 keyboard tracking. If the Snap and Filter parameters (see above) are both set to 0%, make sure the
Formant Kbd is set to 100% to make the audible pitch track the keyboard one semitone per note.