Connections

Flipping the Neptune around reveals an array of connection possibilities. Some of these are CV (control signal) related and some are audio signal related.

Sequencer Control

Note

The Note input allows you to control the pitch of either the Pitch Adjust or Voice Synth (depending on what is currently selected in the MIDI Input section - see “MIDI Input”). The pitch could be controlled from a Note CV output of a Matrix or an RPG-8, for example.

A Gate signal on the Gate input (see below) must also be present for the Note Input to work.

Gate

The Gate input should be used in combination with the Note modulation input (see above). As soon as a gate signal is present, any note modulation on the Note input will be activated. The Gate could be controlled from a Gate CV output of a Matrix or an RPG-8, for example.

CV In

These control voltage (CV) inputs can be used for modulating various Neptune parameters from other devices. The inputs control the following parameters:

Bend

The Pitch Bend input allows you to control pitch bend of either the Pitch Adjust or Voice Synth (depending on what is currently selected in the MIDI Input section - see “MIDI Input”). The pitch bend could be controlled from a Pitch Bend CV output of an RPG-8, for example.

Vibrato

The Mod Wheel input allows you to control the Vibrato amount of either the Pitch Adjust section or Voice Synth (depending on what is currently selected in the MIDI Input section - see “MIDI Input”). The Vibrato could be controlled from a Mod Wheel CV output of an RPG-8, for example.

Formant

The Formant Shift input allows you to control the Shift parameter in the Formant section from a CV source on another device. The Formant Shift parameter accepts bipolar control signals (-63 to +64).

CV Out

These control voltage (CV) outputs can be used for modulating other device parameters from Neptune:

Pitch

The Pitch output allows you to control the pitch of other devices from the Pitch Adjust section, either directly or via the Transpose section (depending on if Transpose is active or not). The Pitch CV corresponds to the pitch of the pitch adjusted and transposed signal. The Pitch output could be connected to the OSC Pitch CV input of another synth device, for example.

Amplitude

Neptune features an internal envelope follower. The Amplitude output sends out a control signal from this envelope follower based on the audio input level to Neptune. The Amplitude output could be connected to the Master Volume or Level CV input of a synth device, for example.

Audio In

Route your audio input signal(s) to the Left (and Right) audio input(s) to the right on the rear panel.

If you want to use Neptune in mono, connect only to the Left input.

Voice Synth Out

Connect to these outputs if you want to break out the audio from the Voice Synth as separate signals and, for example, route to a separate Mix Channel for separate processing.

When these are connected, the Voice Synth audio will be removed from the main Audio Out outputs.

Audio Out

The Left and Right outputs are the main stereo outputs of Neptune. Here, the audio from the Pitch Adjust, Transpose and Formant sections are routed. If the Voice Synth Sep Output (see “Voice Synth Out”) are not connected, the Voice Synth audio output are also routed to the main outputs.

If you want to use Neptune in mono, connect only to the Left output.