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[[Adjustable Fade|<span title="Adjustable Fade increases or reduces the audio volume by a varying amount. This effect is more versatile than Fade In and Fade Out in that it can fade to or from any amplification level rather than only between silence and the original level.">Adjustable Fade</span>]] [[Amplify|<span title="Use the Amplify effect to change the volume of the selected track(s). Amplify always preserves the relative volumes of the tracks and/or channels. You can also use the "Amplification (dB)" box in Amplify as a quick check of the current peak level of the selection.">Amplify</span>]] [[Auto Duck|<span title="Auto Duck reduces (ducks) the volume of one or more selected tracks whenever the volume of a specified "control track" reaches a particular threshold level. The effect can be used to create voice-overs for podcasts or DJ sets, for automatic "ramping" of background music.">Auto Duck</span>]] [[Bass and Treble|<span title="Bass and Treble increases or decreases the lower frequencies and higher frequencies of your audio independently. It behaves just like the bass, treble and volume controls on a domestic stereo system.">Bass and Treble</span>]] [[Beat Finder|<span title="Beat Finder attempts to place labels at beats which are much louder than the surrounding audio. It's a fairly rough and ready tool, and will not necessarily work well on a typical modern pop music track with compressed dynamic range.">Beat Finder</span>]] [[Change Pitch|<span title="Use Change Pitch to change the pitch of a track without changing its tempo (speed). You can use this to change music from a known key to another key.">Change Pitch</span>]] [[Change Speed|<span title="Use Change Speed to change the speed of a track, affecting its tempo, pitch and frequency content. When you slow a track down, all its frequencies become lower, and when you speed it up, they all become higher.">Change Speed</span>]] [[Change Tempo|<span title="Use Change Tempo to change the tempo of the selection without changing its pitch. This can be used to change a song at a known BPM to another BPM.">Change Tempo</span>]] [[Chirp|<span title="Chirp produces four different types of tones like the Tone Generator but additionally allows setting of the start and end amplitude and frequency. Short tones can be made to sound very much like a bird call.">Chirp</span>]] [[Classic Filters|<span title="Classic Filters offers three different types of filter which together emulate the vast majority of analog filters, providing a useful graphical tool for analysis and measurement. This effect is not not enabled by default. To enable it, use Effect > Add / Remove Plug-ins... .">Classic Filters</span>]] [[Click Removal|<span title="Click Removal attempts to remove clicks on audio tracks and is especially suited to declicking recordings made from vinyl records, without damaging the rest of the audio. Very soft and rapid light vinyl ticks that sound like crackle from static electricity will not be effectively removed. For this type of noise you should use Noise Removal instead.">Click Removal</span>]] [[Clip Fix|<span title="Attempts to reconstruct clipped regions by interpolating the lost signal. It is only likely to be effective for repairing lightly clipped audio.">Clip Fix</span>]] [[Compressor|<span title="Compressor reduces the dynamic range of audio. One of the main purposes of reducing dynamic range is to permit the audio to be amplified further (without clipping) than would otherwise be possible.">Compressor</span>]] [[Contrast|<span title="Contrast Analysis analyzes a selected, single non-stereo audio track to determine the average RMS difference in volume (contrast) between foreground (the speech) and background (music, audience noise or similar). The purpose is to determine if the speech will be intelligible to the hard of hearing.">Contrast</span>]] [[Crossfade Clips|<span title="Applies a simple crossfade to a selected pair of clips in a single audio track">Crossfade Clips</span>]] [[Crossfade Tracks|<span title="Use Crossfade Tracks to make a smooth transition between two overlapping tracks one above the other. Place the track to be faded out above the track to be faded in then select the overlapping region in both tracks and apply the effect.">Crossfade Tracks</span>]] [[Delay|<span title="Use Delay to create a multiple echo effect with options for variable delay times and the number, amplitude and pitch of repeats. Delay often adds audio, so clipping may result. Clipping can be removed using Amplify in 32-bit projects, otherwise undo Delay, de-amplify the audio, then apply Delay again.">Delay</span>]] [[Distortion|<span title="Use Distortion to make the audio sound more crunchy or abrasive. This is a "waveshaper" effect, equivalent to applying non-linear amplification to the audio waveform and so changing the frequency content.">Distortion</span>]] [[DTMF Tones|<span title="Generates dual-tone multi-frequency (DTMF) tones like those produced by the keypad on telephones. You can specify the ratio of the tone length to the length of silence between tones.">DTMF Tones</span>]] [[Echo|<span title="Echo repeats the audio you have selected again and again, normally softer each time. Unlike Delay, Echo does not generate additional audio outside the selection, so it is often necessary to add sufficient silence to the end of your track(s) to accommodate your echo settings.">Echo</span>]] [[Fades#linearfade|<span title="A fade in is often applied over a very short audio selection (less than a second). You may get a more "musical" result by applying a linear fade in three times to the same audio selection.">Fade In</span>]] [[Fades#linearfade|<span title="Applies a fade to the selected audio such that the amplitude of the selection goes from the original amplitude to absolute silence. A fade out is often applied to a longer selection than a fade in, typically to a selection up to about ten seconds long.">Fade Out</span>]] [[Fades#studio_fadeout|<span title="Produces a smooth and "musical" sounding fade out from original volume to silence by applying a doubly-curved (S-shape) fade and fading out the higher frequencies a little quicker than the lower frequencies. It gives a "going off into the distance" type of sound.">Studio Fade Out</span>]] [[Find Clipping|<span title="Displays runs of clipped samples in a Label Track, as a screen-reader accessible alternative to the View > Show Clipping command. A run must include at least one clipped sample, but may include unclipped samples too.">Find Clipping</span>]] [[Filter Curve EQ|<span title="An FTT equalizer. Equalization is a way of manipulating sounds by Frequency. It allows you to increase the volume of some frequencies and reduce others. This is a more advanced form of the EQ and Tone controls on many audio systems.">Filter Curve EQ</span>]] [[Graphic EQ|<span title="Equalization is a way of manipulating sounds by Frequency. It allows you to increase the volume of some frequencies and reduce others. This is a more advanced form of the EQ and Tone controls on many audio systems.">Graphic EQ </span>]] [[High-Pass Filter|<span title="High-Pass Filter passes frequencies above its cutoff frequency and attenuates frequencies below its cutoff frequency. This effect can therefore be used to reduce low frequency noise.">High-Pass Filter </span>]] [[Invert|<span title="Invert flips the audio samples upside-down, reversing their polarity. The positive samples (above the horizontal zero line in the Audacity Waveform) are moved below the zero line (so becoming negative), and negative samples are made positive.">Invert</span>]] [[Label Sounds|<span title="Label Sounds is a tool which can useful to label the different songs or sections in a long recording, such as the tracks from an LP or cassette. Use this to make the labels show the exact region of each track to be exported.">Label Sounds</span>]] [[Limiter|<span title="Limiter passes signals below a specified input level unaffected or gently reduced, while preventing the peaks of stronger signals from exceeding this threshold. Mastering engineers often use this type of dynamic range compression combined with make-up gain to increase the perceived loudness of an audio recording during the audio mastering process.">Limiter</span>]] [[Loudness Normalization|<span title="Loudness Normalization changes the level of the audio (normally reduces it to recommended limits). It is based on EBU R 128 recommendations on limiting the loudness of audio signals.">Loudness Normalization</span>]] [[Low-Pass Filter|<span title="Low-Pass Filter passes frequencies below its cutoff frequency and attenuates frequencies above its cutoff frequency. This effect can therefore be used to reduce high pitched noise.">Low-Pass Filter</span>]] [[Measure RMS|<span title="A simple analyzer to measure the RMS (Root Mean Square) levels in a track.">Measure RMS</span>]] [[Noise Gate|<span title="Noise Gate reduces the level of sound below a specified threshold level.">Noise Gate</span>]] [[Noise Reduction|<span title="Noise Reduction can reduce constant background sounds such as hum, whistle, whine or buzz, and moderate amounts of hiss. It is not suitable for individual clicks and pops, or irregular background noise such as from traffic or an audience.">Noise Reduction</span>]] [[Noise|<span title="Generates one of three different types of noise. White noise is that which has the greatest ability to mask other sounds, as it has similar energy at all frequency levels. Pink noise and Brownian noise both have more energy at lower frequencies, especially Brownian, which has the most muffled, low pitched sound of the three types.">Noise</span>]] [[Normalize|<span title="Use Normalize to set the peak amplitude of a single track, make multiple tracks have the same peak amplitude and equalize the balance of left and right channels of stereo tracks. Optionally you can remove any DC offset from the tracks.">Normalize</span>]] [[Notch Filter|<span title="Notch Filter sharply attenuates frequency-specific noise like mains hum or electrical whistle with minimal damage to the remaining audio, by cutting a notch out of the frequency spectrum at that point.">Notch Filter</span>]] [[Nyquist Plug-in Installer|<span title="The Nyquist Plug-in Installer simplifies the installation of Nyquist plug-ins. It provides a file browser for selecting the plug-in file, and then copies the file to the correct location.">Nyquist Plug-in Installer</span>]] [[Nyquist Prompt|<span title="Nyquist Prompt lets you run and debug code snippets for your own plug-ins created using the Nyquist programming language. This may be quicker than creating a complete plug-in which would require additional header lines.">Nyquist Prompt</span>]] [[Paulstretch|<span title="Use Paulstretch to slow down audio by extreme amounts without changing the pitch. ">Paulstretch</span>]] [[Phaser|<span title="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). The effect's output may have higher amplitude than the original audio, leading to clipping. Clipping can be removed using Amplify in 32-bit projects, otherwise undo Phaser, de-amplify the audio, then apply Phaser again.">Phaser</span>]] [[Plot Spectrum|<span title="Plot Spectrum takes the selected audio (which is a set of sound pressure values at points in time) and converts it to a graph of frequencies (Hz) against amplitudes (dB). You can choose different algorithms, log or linear axis and different size and type for the FFT window. You can also export the analysis to a text file.">Plot Spectrum</span>]] [[Pluck|<span title="Pluck generates a synthesized pluck tone with abrupt or gradual fade-out, and selectable pitch corresponding to a MIDI note. If you generate a short pluck and use Effect > Repeat... on it, it can be used as an alternative to Rhythm Track.">Pluck</span>]] [[Regular Interval Labels|<span title="Regular Interval Labels places point labels in a label track so as to divide the associated audio into smaller, equally-sized segments. This can be useful for distributing a large file on the internet or ensuring that all exported files are the same size.">Regular Interval Labels</span>]] [[Repair|<span title="Repair removes a very short region of damaged or destroyed audio, replacing it with an estimated region of audio based on what is happening either side of the region. It may be used for example to repair a click on a vinyl record, or a tape dropout.">Repair</span>]] [[Repeat|<span title="Repeat repeats the selection the specified number of times. The effect automatically calculates the new length of the selection.">Repeat</span>]] [[Reverb|<span title="Reverb adds reverberation (rapid, modified repetitions blended with the original sound that gives an impression of ambience). Adding reverberation is sometimes desirable for concert halls that are too small or contain so many people that the hall's natural reverberance is diminished.">Reverb</span>]] [[Reverse|<span title="Reverses the selected audio, so that the end of the audio will be heard first and the beginning last. Some people reverse small portions of audio to make inappropriate language unintelligible, while others believe you can hear subliminal messages if you listen to speech backwards. You can also create interesting sound effects by recording natural events and reversing the audio.">Reverse</span>]] [[Rhythm Track|<span title="Rhythm Track generates a sequence of regular pulses at the selected tempo, beats per measure and either number of measures or track duration, using a selectable click sound. It can thus be used like a metronome for setting a steady beat against which an overdub recording can be made.">Rhythm Track</span>]] [[Risset Drum|<span title="Risset Drum produces a sound based on work by the composer of electronic music, Jean Claude Risset. It consists of band-pass filtered noise, an enharmonic tone and a relatively strong sine wave at the fundamental.">Risset Drum</span>]] [[Sample Data Export|<span title="Sample Data Export reads the values of successive samples from the selected audio and prints this data to a plain text, CSV or HTML file. Further information may be added as a header at the top of the file.">Sample Data Export</span>]] [[Sample Data Import|<span title="Reads numeric values from a plain ASCII text file and creates a PCM sample for each numeric value read">Sample Data Import</span>]] [[Silence|<span title="Generates audio of zero amplitude, the only configurable setting being duration. When applied to an audio selection, the result is identical to Edit > Remove Special > Silence Audio.">Silence</span>]] [[Sliding Stretch|<span title="Make a continuous change to the tempo and/or pitch of a selection by choosing initial and/or final change values. Tempo changes made without selecting a pitch change preserve the original pitch, and pitch changes made without selecting a tempo change preserve the original tempo. This effect produces higher quality audio than Change Pitch or Change Tempo, but is slower.">Sliding Stretch</span>]] [[Spectral Delete|<span title="This is used with a Spectral Selection to delete that spectral selection from the audio.">Spectral Delete</span>]] [[Spectral edit multi tool|<span title="When the selected track is in spectrogram or spectrogram log(f) view, applies a notch filter, high-pass filter or low-pass filter according to the spectral selection made">Spectral edit multi tool</span>]] [[Spectral edit parametric EQ|<span title="When the selected track is in spectrogram or spectrogram log(f) view and the spectral selection has a center frequency and an upper and lower boundary, performs the specified band cut or band boost">Spectral edit parametric EQ</span>]] [[Spectral edit shelves|<span title="When the selected track is in spectrogram or spectrogram log(f) view, applies either a low- or high-frequency shelving filter or both filters, according to the spectral selection made">Spectral edit shelves</span>]] [[Tone|<span title="Generates one of four different tone waveforms. The name of each tone roughly describes its appearance when zoomed in sufficiently to see each cycle of the waveform.">Tone</span>]] [[Tremolo|<span title="Tremolo modulates the volume of the selection at the depth and speed selected in the dialog. This is the same as the tremolo effect familiar to guitar and keyboard players.">Tremolo</span>]] [[Truncate Silence|<span title="Truncate Silence automatically reduces the length of passages where the volume is below the specified level for at least the specified duration. The effect offers a basic option that truncates to the exact length specified and an advanced option that reduces silences in proportion to their original duration.">Truncate Silence</span>]] [[Vocal Reduction and Isolation|<span title="Vocal Reduction and Isolation... attempts to remove center-panned audio from a stereo track. Vocals are sometimes (but not always) recorded in this way. Most Remove options in this effect preserve the stereo image.">Vocal Reduction and Isolation</span>]] [[Vocoder|<span title="Vocoder synthesizes a modulator (usually a voice) in the left channel of a stereo track with a carrier wave in the right channel to produce a modified version of the left channel. Vocoding a normal voice with white noise as provided in the effect will produce a robot-like voice for special effects.">Vocoder</span>]] [[Wahwah|<span title="Rapid tone quality variations, like that guitar sound so popular in the 1970's. The effect's output may have higher amplitude than the original audio, leading to clipping. Clipping can be removed using Amplify in 32-bit projects, otherwise undo Wahwah, de-amplify the audio, then apply Wahwah again.">Wahwah</span>]] this list.