Operation Manual

Equalization –

Boost or reduce arbitrary frequencies. You can select one of a

number of different curves designed to equalize the sound of some popular

record manufacturers, or draw your own curve.

Fade In – fades the selection in linearly.

Fade Out –

fades the selection out linearly.

FFT Filter –

similar to Equalization, lets you enhance or reduce arbitrary

frequencies. The curve here uses a linear scale for frequency.

Invert –

Flips the waveform vertically, the same as a phase inversion in the

analogue domain.

Noise Removal – This effect lets you clean up noise from a recording. First,

select a small piece of audio that is silent except for the noise, select “ Noise

Removal”, and click on the “Get Noise Profile” button. Then select all of the

audio you want filtered select “ Noise Removal” again, and click the “ Remove

Noise” button. You can experiment with the slider to

try to remove more or

less noise. It is normal for Noise Removal to result in some distortion. It works

best when the audio signal is much louder than the noise.

Normalize –

allows you to correct for DC offset (a vertical displacement of the

track) and/or amplify such that the maximum amplitude is a fixed amount -3Db.

It’s useful to normalize all of your tracks before mixing. If you have a lot of

tracks, you may then need to use the track gain sliders to turn some

down.

Nyquist Prompt –

for advanced users only. Allows you to express arbitrary

transormations using a powerful functional programming language. See the

Nyquist section of the Audacity website for more information.

Phaser – the name “Phaser” comes from “Phase Shifter”, because it works by

combining phase-shifted signals with the original signal. The movement of the

phase-shifted signals is controlled using a low Frequency Oscillator (LFO).

Repeat –

repeats the selection a certain number of times. This operation is

quite fast and space-efficient, so it is practical to use

it to create nearly-infinite loops.

Reverse –

This effect reverses the selected audio temporally; after the effect

the end of the audio will be heard first and the beginning last.