User Manual

Table Of Contents

The oscillators, ﬁlter, modulators, and other parts are connected in the most useful ways for producing

and modifying electronic signals that result in sounds. Unlike the patchable connections made on

modular synthesizers, many of the connections between the various Subsequent 25 circuits are

hardwired, meaning that it is not possible to change the routing of the pathways that connect them.

The electrical signals within a synthesizer are either audio signals or control signals, depending on

the pathway they follow. Typically, an audio signal begins with an oscillator and passes through the

ﬁlter on its way to the audio output. Control signals are used to change things, like the pitch, timbre,

waveshape, or loudness of an audio signal.

Any time a signal controls something, no matter whether it’s controlling an audio signal or another

control signal, we say that it modulates it. In synth-speak, you could say that a steering wheel

modulates a car’s direction and the accelerator pedal modulates its speed. When you play Subsequent

25 keyboard, the key you press modulates the instrument’s pitch. You can modulate ﬁlter cutoff by

turning a knob manually, or you can apply a control signal from a low-frequency oscillator or envelope

to modulate it electronically. It’s worth noting that a control destination can be modulated by more

than one control source.

SUBSEQUENT 25 SIGNAL FLOW

Subsequent 25 can be controlled using control voltages and MIDI commands. When your Subsequent 25

receives either a control signal from the onboard keyboard or a Note On command from an external

MIDI source, it responds by sending a gate signal to trigger the envelopes and a control voltage (CV)

to control oscillator pitch. The envelopes respond by sending control signals to the ampliﬁer and ﬁlter.

Every Subsequent 25 knob and button transmits MIDI data. This functionality is useful for recording

your knob turns and button presses into a computer-based DAW, as well as for controlling external

devices using the Subsequent 25 front-panel controls. All the settings that make up a Patch are called

its parameters, which is simply another name for settings.

VCO 2

LEVEL

VCO 1

LEVEL

SUB 1

LEVEL

MULTI-

DRIVE

EXT

AUDIO

BASICS OF SOUND (Continued)