First, we must side chain the modulator track (Insert track 2) to the Vocodex track (Insert track 1). In the upper right corner you see that I have selected my microphone from the Audio input source drop down box. I’ve chosen Insert track 2 to be my modulator. I select another Insert track and make sure that I’ve selected the appropriate soundcard input from the Audio input source drop down box. While you can use any sound as the modulator, I will explain how to setup audio input (e.g. Now, we already know that a vocoder needs a carrier and a modulator. It is always a good idea to do this – it is easy to get lost and forget what Insert track is used for what. To keep things tidy I’ve also renamed and colorized the Insert track.
See below:Īs you can see I’ve placed the Vocodex plugin in Insert track 1. In the Mixer, select an Insert track of your choice (not the Master track) and place the Vocodex in FX slot one. Let’s try to do this using the Vocodex plugin.įL Studio 9 comes with a brandnew vocoder plugin called the Vocodex. And this creates this distinctive talking robot sound. The vocoder analyzes (real time) the frequency spectrum of our voice and only lets through the frequencies in the synthesizer sound (the carrier) that are also in our voice. How this is achieved? Well, imagine a synthesizer sound as our carrier and our own voice as the modulator. In music, it is a technique that is often used to create robot style voices. Originally, this technique was used to encode voice for transmissions (vocoder comes from voice encoder). If this modulating signal does not contain frequencies in a specific range, then these frequencies in the carrier are not being let through – hence the output signal will not contain these frequencies. In a vocoder the series of bandpass filters are controlled by the modulating signal. Frequencies outside this range are blocked. See also below for a simple illustration of how a bandpass filter operates:Ī bandpass filter will only let through frequencies between a lower threshold (f1) and a higher threshold (f2). In essence, this is done via a series of bandpass filters - letting through the carrier frequencies that are detected in the modulator and rejecting those that aren’t.
Vocoding is the process is letting the frequency spectrum of one sound (the modulator) modulate the frequency spectrum of another sound (the carrier).
FL Studio 9 tutorial explaining the Vocodex plugin
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