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Planet Phatt Operation Manual48

PROGRAMMING BASICS

PLANET PHATT SIGNAL FLOW

Going back to the block diagram for a single channel we can

re-examine the complete signal path.

Instrument

This is the sampled sound wave. The pitch of the instrument can

be modulated by any modulation source. The sample start point

can only be modulated by a velocity or key source (see the next

page).

Tone

Tone is a simple tone control which can be used to brighten or

mute the sound. Tone can only be modulated by a velocity or key

source (see the next page). Key velocity is commonly used to modu-

late the tone so that the harder you play, the brighter the sound

becomes.

Morphing Filter

The Morphing Filter is used to shape the harmonic content of an

instrument. The Fc can be modulated by any source. The auxiliary

envelope is commonly used to dynamically shape the harmonic

content over time. The Q parameter can only be modulated by a

velocity or key source. There are 17 types of filters available. See

page 67 for complete descriptions of each filter type.

DCA

Digitally Controlled Amplifier. Together with the Volume

AHDSR, the DCA is used to shape the volume contour of a sound.

The DCA can be controlled by any modulation source. Key

Velocity is often used as a modulation source for the DCA so that

the harder you play, the louder the sound becomes.

Pan

Adjusts the balance of sound to the left and right channels. Pan

can be modulated by any realtime or note-on modulation source.

Volume

Pan

Volume

AHDSR

Instrument

Pitch

Sample

Start

Tone

Z-Plane

Filter

DCA

Aux.

DAHDSR

Velocity

Morph Q

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 139 140

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