Moog-music Slim Phatty User Manual download pdf (Page 8)

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Slim Phatty User’s Manual - The Basics

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Slim Phatty User’s Manual - The Basics

To understand the operation of the Slim Phatty, refer to the diagram below. The diagram shows the ow of

the audio, control voltage and modulation signals in the Slim Phatty. Heavy lines are used to indicate audio

signals, which ow from left to right. Lighter lines indicate the control voltages (CV’s), which ow from the

top and bottom. Dotted lines indicate programmable modulation routings.

As the diagram shows, the SP’s source signals are created by two voltage-controlled oscillators which are

mixed together along with the external audio input. The combined audio signal is passed to the low-pass

lter, where the tone is sculpted according to the settings of the lter parameters and the Filter ADSR enve-

lope. The signal then passes to the amplier stage, where the Volume ADSR envelope shapes it. Finally, the

signal is routed to the output section, where the nal level is set by the Master Volume control.

For many users, MIDI will be the main source of control for the Slim Phatty. Each time the SP receives a

MIDI ‘Note On’ command, the SP produces a Pitch CV and Gate signal in response. The Pitch CV signal is

used to specify the pitch of the oscillators, while the Gate signal is used to simultaneously trigger the Filter

and Volume Envelope Generators.

The SP can also be operated via CV and Gate trigger connections, providing for a more ‘old school’ method

of control.

Signal Flow

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Moog-music Slim Phatty User Manual Page 8