User Manual

Core Avid Audio Plug-Ins

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Recti-Fi (RTAS and AudioSuite)

Recti-Fi provides additive synthesis effects through waveform rectification. Recti-Fi multiplies

the harmonic content of an audio track and adds subharmonic or superharmonic tones.

The following table lists the Recti-Fi plug-in parameters:

Reference Pitch The Reference Pitch feature generates a sine wave tone that you can adjust to match a

selected portion of audio material, and then use as an audible reference when pitch-shifting

other audio material in your session.

To use the Reference Pitch feature:

1. Select the audio material you want to use as a pitch reference. Click the Preview button to

begin playback of the selected audio.

2. Click the Reference Pitch button to activate the reference sine wave tone.

3. Adjust the Note and Detune settings to match the reference tone to the pitch of the audio

playback. Adjust the Level setting to change the relative volume of the reference tone.

You can also switch the Reference Pitch on and off to compare pitch.

4. Select the audio material where you want to shift pitch.

5. Adjust the Coarse and Fine controls to match the pitch of the audio playback to the

reference pitch.

Parameter Description

Pre-Filter The Pre-Filter control filters out high frequencies in an audio signal prior to rectification. This

is desirable because the rectification process can cause instability in waveform output —

particularly in the case of high-frequency audio signals. Filtering out these higher frequencies

prior to rectification can improve waveform stability and the quality of the rectification effect.

If you wish to create classic subharmonic synthesis effects, set the Pre-Filter and Post-Filter

controls to a relatively low frequency, such as 250 Hz.

The range of the Pre-Filter is from 43 Hz to 21 kHz, with a maximum value of Thru (which

effectively means bypass).