Alesis ModFX Metavox Specifications download pdf (Page 20)

Connections

Connecting audio

The Metavox will work in many different applications, whether

you are connecting an instrument directly into it, or connecting it

through a mixing console.

Signal processor vs. synthesizer

Unlike other signal processors, a vocoder is half processor, half

synthesizer. A signal processor takes an input signal and makes it

sound different. But a vocoder uses an input signal (usually from

a microphone) to control the amplitude and tone of an internal

oscillator (or an external input); none of the controlling signal is

mixed in with the output signal. Because of this, a vocoder is

usually connected in a different way from most other signal

processors. For example, it’s not likely that you’ll connect the

Metavox in the effect send/return path of a mixing console.

Mic preamplification options

To get the classic “talking guitar” or “talking robot” sounds

associated with vocoding, you’ll probably want to use a vocal

microphone as the controlling input of the Metavox. Since

microphones are low-output devices, they must be amplified to

line level before the Metavox can “read” them. You have several

options for this:

• Direct Out of mixer channel: Connect a microphone to a

mixer channel. Adjust the channel’s input gain (trim) in the

normal way to get a strong output. Connect the DIRECT

OUT of the mixer channel to the [LEFT INPUT] of the

Metavox. If possible, turn off any assignment switches in the

mixer channel to the groups or stereo mixes.

• Outboard mic preamp: Especially for live use, it may be a

good idea to get a small mic preamp and dedicate a special

microphone just for vocoding use to it. Connect the output

of the preamp to the [LEFT INPUT] of the Metavox.

• Aux send of mixer: If your mixer has an extra pre-fader aux

send or monitor send, connect the output of that mix to the

left input of the Metavox. This has the advantage of letting

several different sources be the controller.

• Insert point: If you don’t have a DIRECT OUT on your

mixer, sometimes the INSERT point can act as a pre-fader

direct out by plugging a 1/4” cable in to the “first click”

(about 1/4” before the plug is all the way in) without

interrupting the signal flow to the mixer. Or, if you use a

regular insert cable connected to the input and output of the

Metavox, the microphone level will be set by the TRIM of the

channel, and the channel will “hear” the output of the

Metavox.

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Alesis ModFX Metavox Specifications Page 20

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