Moog-music Minimoog Voyager Performer Edition User Manual download pdf (Page 12)

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Voyager User’s Manual - The Basics

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Voyager User’s Manual - The Basics

To understand the Voyager’s internal signal ow, it’s helpful to consider the three types of signal routings

in the system: the audio path, the control voltage path, and the modulation path.

Audio Path

The Voyager’s audio path includes all of the signal sources and signal modiers that produce an audio

output. These include the oscillators, mixer, lters and ampliers (VCAs).

The Oscillator section includes controls for selecting the octave and waveforms, adjusting the tuning of

the second and third oscillators, for setting the oscillator sync and linear FM functions, and for setting the

frequency range and keyboard control for Oscillator 3.

The Mixer section is where the oscillators and other sound sources (noise and external input) are

selected and mixed together. The output of the Mixer section is routed to the Filter section through a

Mixer Out/Filter In jack on the Voyager’s rear panel. This jack allows you to interrupt the signal routing

between the Mixer and Filter to insert an external effect, or take the output of the Mixer directly.

The Filter section is responsible for altering the harmonic content of the combined sound sources. The

Voyager’s Filter section contains two lters that work together in two different modes.: Dual LP and

HP/LP. Dual LP mode features two lowpass lters in parallel, while HP/LP (Highpass-Lowpass) mode

features a lowpass and highpass lter in series, creating a Bandpass lter response. In either mode,the

Filter Cutoff control affects the cutoff frequency of both lters, and the Spacing control is used to adjust

the difference between the cutoff frequencies. The outputs of the lters are routed to the Voltage

Controlled Ampliers (VCAs).

The VCAs shape the volume level of the audio signal using time-varying control signals called Envelopes.

The Envelopes section (part of the control voltage path) contains one Envelope Generator to control

the Filters, and one Envelope Generator to control the VCAs. The Voyager’s audio path is illustrated

below.

Signal Flow

The Voyager’s Audio Path

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 115 116

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Moog-music Minimoog Voyager Performer Edition User Manual Page 12