Plug-ins Change Audio Qualities



Plug-ins Change the quality of the sound. 

Don’t forget that any pro audio editor is not using all this stuff all the time, and may only use a few of them regularly; those plugins that give the best results for the type of audio they’re working on, Don’t get too deep into them or you’ll never get off the ground 


Amplify: Increases or decreases the volume of the audio you have selected.
Auto Duck: Reduces (ducks) the volume of one or more tracks whenever the volume of a specified "control" track reaches a particular level. Typically used to make a music track softer whenever speech in a commentary track is heard.
Compressor: Compresses the dynamic range by two alternative methods. The default "RMS" method makes the louder parts softer, but leaves the quieter audio alone. The alternative "peaks" method makes the entire audio louder, but amplifies the louder parts less than the quieter parts. Mal ppl ke-up gain can be applied to either method, making the result as loud as possible without clipping, but not changing the dynamic range further.
Limiter: 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.
Normalize: Use the Normalize effect to set the maximum amplitude of a track, equalize the amplitudes of the left and right channels of a stereo track and optionally remove any DC offset from the track.
SC4: This effect is a stereo compressor with a variable envelope follower for
Fade a section in or fade it out
Crossfade Clips: Use Crossfade Clips to apply a simple crossfade to a selected pair of clips in a single audio track.
Crossfade Tracks: 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.
Fade In: Applies a linear fade-in to the selected audio - the rapidity of the fade-in depends entirely on the length of the selection it is applied to. For a more customizable logarithmic fade, use the Envelope Tool on the Tools Toolbar.
Fade Out: Applies a linear fade-out to the selected audio - the rapidity of the fade-out depends entirely on the length of the selection it is applied to. For a more customizable logarithmic fade, use the Envelope Tool on the Tools Toolbar.
Studio Fade Out: Applies a more musical fade out to the selected audio, giving a more pleasing sounding result.
Adjustable Fade: enables you to control the shape of the fade (non-linear fading) to be applied by adjusting various parameters; allows partial (that is not from or to zero) fades up or down.
For a discussion of what the different typesfade do, see Fade

Bass Bass and Treble: Increases or decreases the lower frequencies and higher frequencies of your audio independently; behaves just like the bass and treble controls on a stereo system.

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 enabled by default. To enable it, use Effect > Add / Remove Plug-ins... to open the Plug-in Manager: Effects, Generators and Analyzers dialog.
Distortion: Use the Distortion effect to make the audio sound distorted. By distorting the waveform the frequency content is changed, which will often make the sound "crunchy" or "abrasive". Technically this effect is a waveshaper. The result of waveshaping is equivalent to applying non-linear amplification to the audio waveform. Preset shaping functions are provided, each of which produces a different type of distortion.
Equalization: Adjusts the volume levels of particular frequencies.
High Pass Filter: Passes frequencies above its cutoff frequency and attenuates frequencies below its cutoff frequency.
Low Pass Filter: Passes frequencies belowg its cutoff frequency and attenuates frequencies above its cutoff frequency.
Paulstretch: Use Paulstretch only for an extreme time-stretch or "stasis" effect, This may be useful for synthesizer pad sounds, identifying performance glitches or just creating interesting aural textures. Use Change Tempo or Sliding Time Scale rather than Paulstretch for tasks like slowing down a song to a "practice" tempo.
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).
Spectral edit parametric EQ: 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. This can be used as an alternative to Equalization or may also be useful to repair damaged audio by reducing frequency spikes or boosting other frequencies to mask spikes.
Spectral edit shelves: 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. This can be used as an alternative to Equalization or may also be useful to repair damaged audio by reducing frequency spikes or boosting other frequencies to mask spikes.
Tremolo: Modulates the volume of the selection at the depth and rate selected in the dialog. The same as the tremolo effect familiar to guitar and keyboard players.
Vocoder: Synthesizes audio (usually a voice) in the left channel of a stereo track with a carrier wave (typically white noise) in the right channel to produce a modified version of the left channel. Vocoding a normal voice with white noise will produce a robot-like voice for special effects.
Wahwah: Rapid tone quality variations, like that guitar sound so popular in the 1970's.
Repair damaged audio
Click Removal: Click Removal is designed to remove clicks on audio tracks and is especially suited to declicking recordings made from vinyl records.
Clip Fix: Clip Fix attempts to reconstruct clipped regions by interpolating the lost signal.
Noise Reduction: This effect is ideal for reducing constant background noise such as fans, tape noise, or hums. It will not work very well for removing talking or music in the background. More details here.
Notch Filter: Greatly attenuate ("notch out") a narrow frequency band. This is a good way to remove mains hum or a whistle confined to a specific frequency with minimal damage to the remainder of the audio.
Repair: Fix one particular short click, pop or other glitch no more than 128 samples long.
Spectral edit multi tool: 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. This effect can also be used to change the audio quality as an alternative to using Equalization.
Make the sound faster, slower, lower pitched or higher pitched
Change Pitch: Change the pitch of a selection without changing its tempo.
Change Speed: Change the speed of a selection, also changing its pitch.
Change Tempo: Change the tempo and length (duration) of a selection without changing its pitch.
Sliding Time Scale / Pitch Shift: This effect allows you to make a continuous change to the tempo and/or pitch of a selection by choosing initial and/or final change values.
Paulstretch: Use Paulstretch only for an extreme time-stretch or "stasis" effect, This may be useful for synthesizer pad sounds, identifying performance glitches or just creating interesting aural textures. Use Change Tempo or Sliding Time Scale rather than Paulstretch for tasks like slowing down a song to a "practice" tempo.
Truncate Silence: Automatically try to find and eliminate audible silences. Don't use with faded audio.
Add reverberation or echo
Delay: A configurable delay effect with variable delay time and pitch shifting of the delays.
Echo: Repeats the selected audio again and again, normally softer each time and normally not blended into the original sound until some time after it starts. The delay time between each repeat is fixed, with no pause in between each repeat. For a more configurable echo effect with a variable delay time and pitch-changed echoes, see Delay.
Reverb: A configurable stereo reverberation effect with built-in and user-added presets. It can be used to add ambience (an impression of the space in which a sound occurs) to a mono sound. Also use it to increase reverberation in stereo audio that sounds too "dry" or "close".

For details of the underlying principles of delay and reverb effects please see this page in the Wiki.
Remove vocals
Invert: This effect flips the audio samples upside-down. This normally does not affect the sound of the audio at all. It is occasionally useful for vocal removal.
Vocal Reduction and Isolation: Attempts to remove or isolate center-panned audio from a stereo track. Most "Remove" options in this effect preserve the stereo image.
Vocal Remover: (Legacy effect) Attempts to remove center-panned vocals from a stereo track. The output from this effect will always be mono. Help text is available from within the dialog.
Manipulate Audio
Repeat: Repeats the selection the specified number of times.
Reverse: Reverses the selected audio; after the effect the end of the audio will be heard first and the beginning last.
Invoke Nyquist
Nyquist Prompt: Brings up a dialog where you can enter Nyquist commands. Nyquist is a programming language for generating, processing and analyzing audio. For more information see Nyquist Plug-ins ReferencGenerators by Function


See the Generate Menu for further details.
Generate Tones
Chirp: Generates four different types of tone waveform like the Tone Generator, but additionally allows setting of the starting and ending amplitude and frequency.
DTMF Tones: Generates dual-tone multi-frequency (DTMF) tones like those produced by the keypad on telephones.
Tone: Generates one of four different tone waveforms: Sine, Square, Sawtooth or Square (no alias), and a frequency between 1 Hz and half the current project rate.
Generate Silence or Noise
Noise: Generates 'white', 'pink' or 'brown' noise.
Silence: Creates audio of zero amplitude, the only configurable setting being duration.
Generate Instruments or Metronome
Rhythm Track: Generates a track with regularly spaced sounds at a specified tempo and number of beats per measure (bar).
Pluck: A synthesized pluck tone with abrupt or gradual fade-out, and selectable pitch corresponding to a MIDI note.
Risset Drum: Produces a realistic drum sound.
Generate from Imported Data
Sample Data Import: Create audio from imported numeric data.

Analyzers by Function

See the Analyze Menu for further details.
Analyze Amplitude or Other Audio Properties
Contrast: Analyzes a single mono or stereo speech track to determine the average RMS difference in volume (contrast) between foreground speech and background music, audience noise or similar. The purpose is to determine if the speech will be intelligible to the hard of hearing.
Find Clipping: Displays runs of clipped samples in a Label Track, as a screen-reader accessible alternative to View > Show Clipping. A run must include at least one clipped sample, but may include unclipped samples too.
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 against amplitudes.
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.
Divide Up Sounds or Silences using Labels
Regular Interval Labels: Places labels in a long track so as to divide it into smaller, equally sized segments.
Silence Finder: Divides up a track by placing point labels inside areas of silence.
Sound Finder: Divides up a track by placing region labels for areas of sound that are separated by silence.
Mark Beats using Labels
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. If you do not get enough beats detected, try reducing the "Threshold Percentage" setting.
VST DOWNLOADABLE PLUGINS

List of Plug-ins with download links

ADopplerEn.dll
Antares AutoTune Evo - Mostly works with current Audacity. Automatic pitch correction works, but to be able to draw pitch curves clock must be set to "internal" and not "host". (commercial)
Antress Modern Plug-ins including a number of compressors, a limiter, an expander, an exciter and a "spacer" which could be used for creating "fake stereo"
ANWIDA Soft DX Reverb Light.dll for Windows and Mac (PowerPC only)
Bo Johansen Plug-ins
BJ Flanger.dll
BJ LoFi.dll
BJ Overdrive.dll
BJ Ringmodulator.dll
BJ Tremolo.dll
BJ Wavechanger2.dll
Bluecat Plug-ins
BlueCatMonoChorusVST.dll
BlueCatFlangerVST(Mono).dll
BlueCatFlangerVST(Stereo).dll
BlueCatPhaserVST(Mono).dll
BlueCatPhaserVST(Stereo).dll
BlueCatStereoChorusVST.dll
bs2b.dll stereo to binaural
Buzzroom CL 201 (Vintage Maximiser) - now shareware

Classic plug-ins
Classic Auto-Filter.dll
Classic Chorus.dll
Classic Compressor.dll
Classic Delay.dll
Classic EQ.dll
Classic Flanger.dll
Classic Master Limiter.dll
Classic Phaser.dll
Classic Reverb.dll
digitalfishphones plug-ins

dominion v1.2.dll - a tool to shape the envelope of a signal, giving you total control of the signal's attack & sustain phase
endorphin - dual-band stereo compressor
Fish fillets package
BLOCKFISH - compressor for Windows and OS X (PPC only)
FLOORFISH.dll - expander/noise gate for Windows and OS X (PPC only)
SPITFISH.dll - de-esser for Windows and OS X (PPC only)
normalizer.dll - a denormalization tool
THD.dll - analog-style saturator
DtBlkFx (FFT-based frequency and harmonics manipulation). Also supports OS X (Universal binary) but only Windows version tested.
Extra Boy Pro removal and isolation of audio components (commercial, paid for)
EZmix (commercial, time limited demo available). Also supports OS X but only Windows version tested.
Freeverb Plug-ins
Freeverb for OS X
Freeverb2.dll for Windows
FreeverbToo.dll for Windows
GMulti Multi-band compressor
iZotope vinyl for Windows and OS X
JS plug-in pack - contains plug-ins listed below.
JS 6 equalizer V1.0.dll
JS Band Cut V1.0.dll
JS Compresseur V1.1.dll
JS Disto V1.0.dll
JS equalizer V1.0.dll
Humanizer v1.0.dll
JS Limiteur V1.0.dll
JS Magneto V1.1.dll
JS Mini-sample V1.0.dll
JS Noise Attenu V1.0 .dll
JS Noise Filtre V1.0.dll
JS Oscil resonne V2.0 .dll
JS Oscil resonne V3.0.dll
JS PanDelay .dll
JS Resonnateur V1.0.dll
JS Vibrato V1.0.dll
jVSTwRapper-based plug-ins (on Windows, Mac OSX PPC/Intel and Linux).

jVSTwRapper is a way of writing Java plug-ins using VST-based technology, enclosed in a wrapper that makes them compatible for use in VST, Audio Unitsand LADSPA hosts. Thus jVSTwRapper plug-ins can be run on all three platforms.
Killeringer.dll
Lisp level-independent sibilance processor
Smartelectronix Plug-ins
Ambience - reverb plug-in for Windows, OS 9/X (PPC only)
mda Bandisto.dll
mda BeatBox.dll
Bouncy.dll
mda Combo.dll
mda De-ess.dll
mda Degrade.dll
mda Delay.dll
mda Detune.dll
mda Dither.dll
mda DubDelay.dll
mda Dynamics.dll
mda Envelope.dll
mda Image.dll
mda Leslie.dll
mda Limiter.dll
mda Loudness.dll
MjCompressor.dll for Windows and OS X Windows version only has a tabular interface even in Audacity 1.3.8+
mda MultiBand.dll
mda Overdrive.dll
mda RePsycho!.dll
mda RezFilter.dll
mda RingMod.dll
mda RoundPan.dll
mda Shepard.dll
mda Splitter.dll
mda Stereo.dll
mda SubSynth.dll
mda Talkbox.dll
mda ThruZero.dll
mda Tracker.dll
mda VocInput.dll
mda Vocoder.dll
NorthPole.dll
REFLEX free - a regenerating delay plug-in, a mixture of stereo delays followed by a dense
Robotizer for Windows and Mac OS X (PPC only)
RoomMachine844.dll
RubyTube.dll
TAL-Reverb-2 - popular GPL licensed plate reverb
TapeIt.dll
TB Compressor (working demo) in Tone Boosters plug-in bundle - supports "New York" or "parallel" compression
UpStereo.dll - stereo widener
UpStereo for OS X (not tested)
VdPhazor.dll
VOX_DoctorDemo.dll - De-Esser
VRingMod.dll
VSpectShift.dll
xChorus.dll
xfaser_lite.dll

List of Plug-ins for which we have no download links

2WarpDelay_v1.dll

4poleLPF.dll

Neosweep.dll

Acidfanatic overdrive.dll

Acidfanatic stereo2mono.dll

Acidfanatic ultradrive.dll

AnalogDelay.dll

AnechoicRoomSimulator.dll

ariesverb_0_2.dll

B_Decoder.dll

bandspin.dll

BassChorusV23.dll

BassPhaserV10.dll

Big Tick Dual Delay.dll

Big Tick Hexaline.dll

BPan_e.dll

BPan_e_gui.dll

BPan_m.dll

BPan_m_gui.dll

c3multibandcomp_1_2.dll

c3multibandcomp_1_2sse.dll

CamelPhatFree.dll

CatDelay.dll

CatDelay_1_3.dll

CCTDelayLE.dll

Chimecho.dll

CompactDistortion.dll

Compressor2.dll

Compressor.dll

CoyoteWah.dll

CrazyIvan.dll

D_Limiter.dll

dB Compressor.dll

dbFree.dll

DCOffsetKiller.dll

Delayer.dll

Delta Filter.dll

Delta Force.dll

Delta Phase.dll

Delta Ping.dll

Delta Space.dll

dfx Buffer Override mono.dll

dfx Buffer Override stereo.dll

dfx Monomaker.dll

dfx Scrubby.dll

dfx Skidder.dll

DFX Transverb.dll

Distortionator Mk2.dll

Dr_ExpanderDemo.dll

echographz.dll

effex.dll

E-Phonic LOFI.dll

E-Phonic XPressor.dll

F_M_Comp.dll

F_M_EQShelf.dll

F_M_Tube.dll

F_S_Comp.dll

F_S_EQFilter.dll

F_S_EQShelf.dll

F_S_LineT.dll

F_S_Phase.dll

F_S_Tube.dll

FEILEI Surround Echo.dll

FEILEI Surround Encode.dll

FEILEI Surround Pan.dll

Filterizer.dll

FilterONE.dll

firegain.dll

Flaser.dll

Flipper.dll

FloFi.dll

florus.dll

FlybabyBETA.dll

Fruity 7band EQ.dll

Fruity balance.dll

Fruity bass boost.dll

Fruity blood overdrive.dll

Fruity filter.dll

Fruity delay.dll

Frohmage_vst2win.dll

Fuzz-Stone.dll

Gain.dll

GClip.dll

GComp.dll

GeneComp3.dll

GeneComp3_mono.dll

GeneComp.dll

GeneComp_mono.dll

GGate.dll

GHi.dll

Glacier.dll

dBlue Glitch - requires Audacity 1.3.9 or later; random probability feature does not work in Audacity 2.0.2

GLow.dll

GranComp3.dll

GranComp3_mono.dll

GranComp.dll

GranComp_mono.dll

GRevDly.dll

GVerb.dll

Hard Limiter.dll

IndyGoDelay.dll

IndyGoGater.dll

IndyGoTremolo.dll

Invada EQ-Tube-Mono.dll

Invada EQ-Tube-Stereo.dll

Invada Tube-Mono.dll

Invada Tube-Stereo.dll

karlette.dll

KarmaFX Deelay.dll

KarmaFX Filter.dll

KewlCompressor.dll

KONTRAST.DLL

KristalEQ.dll

Kristalizer.dll

KristalReverb.dll

KTAudioHealer.dll

KwikKomp2b1.dll

KwikKomp3VST.dll

Levels.dll

LoFiPlus.dll

LPGEQ2.dll

LPGEQ2_1.dll

LPGEQ.dll

LPGEQ_mono.dll

Mab.dll

MadShifta.dll

mdspFlanger.dll

Megatrancer.dll

MjRotoDelay.dll

MnComp_v1r.dll

MonstaChorus.dll

Morphing Delay 2.1 Demo.dll

msBalance.dll

msComp.dll

msDecode.dll

msDelay.dll

msEncode.dll

msSwap.dll

msvcr71.dll

ndcPanner.dll

ndcTrem.dll

ndcTrem_plus.dll

noisegate.dll

Null-BandSpin.dll

P1-Tapedelay.dll

PalancarWare Brick.dll

PalancarWare DeDC.dll

PalancarWare Empire.dll

PalancarWare Ozone.dll

PalancarWare Refero.dll

PalancarWare Scalar.dll

ppdisto.dll

preamp.dll

pvaccu.dll

pvexag.dll

pvtransp.dll

pwmdrive.dll

pzx.dll

q_delOizer30.dll

Qamp.dll

respass.dll

RetroDelay.dll

Reverb.dll

Reversinator.dll RMD.dll

Saturator.dll - analog tape saturation emulator for added "warmth"

sc4.dll

sc 04 sec Stereo Delay.dll

sc Multi Delay.dll

sc Multi Tap Delay.dll

sc Stereo Panner.dll

sc Tremelo.dll

SDynamics.dll

SFilter.dll

SH-1 Chorus.dll

SH-1 Filter.dll

SH-1 Graphic EQ.dll

SH-1 LFO Multi.dll

SH-1 PhaseSifter.dll

SH-1 Reverb.dll

ShivaShifta.dll

SideChCompMn.dll

SideChCompSt.dll

SideKick2.dll

Silverspike Reverb-it Demo.dll

SimpleQ.dll

SimpleTremolo.dll

SLFO.dll

Solidverb.dll

SonicChorus.dll

SpectriX.dll

SPICE1_01.dll

Square-o-matic.dll

Stardust.dll

Starplugs-RuntimePanner.dll

StComp_v1r.dll

stepper.dll

Stereoizer.dll

StereoFaker.dll

StereoStretcher.dll

StereoTools.dll

StudioVerb.dll

SupaPhaser.dll

surrounder.dll

TapeDelay.dll

Telephone.dll - simple, very realistic telephone audio simulator.

TK-3BandDisto.dll

TK-4Filters.dll

TK-BPMDelay.dll

TK-BPMDelayS.dll

TK-FeedFlanger.dll

TK-FilterDisto.dll

TK-FlangDestructor.dll

TK-LPFilterMod.dll

TK-StereoFlanger.dll

TranceFormer.dll

tridirt.dll

T-SLEDGE.dll

TubeBaby.dll

unmatched.dll

VariDelay.dll

VFlange.dll

VFlanger.dll

VIBRATOR1_00.dll

Vibro.dll

Volcano.dll

VoxengoEssEQ.dll

VoxengoLampthruster (a VST amp simulator)

VoxengoOldSkoolVerb.dll

VoxengoPowershaper.dll

VoxengoSampleDelay.dll

VoxengoStereoTouch.dll

VoxengoTempoDelay.dll

VoxengoTubeAmp1.dll

VoxengoTubeAmp.dll

VPingPong.dll

WARP.DLL

Whix.dll

Z-BandSpin.dll

Z-FilterDub.dll

Z-Florus.dll

Z-Ringer.dll

Z-SpShift.dll

These plug-ins usually appear towards the bottom of the Generate menu in Audacity.

Tone Generators
Buzz tone generator
DTMF Tones (random)
DTMF Tones
PWM

Noise Generators
Harmonic Noise

Special Effects
Binaural Tones with Surf 2
Surf-lfo
Surf-oxy

Instruments
Fire and Explosion sounds
KLSTRBAS
Pluck (Hz)
Risset Bell

Sequence Generators
Rndtone
SQ1 Generator Sequencer

Generator Utilities
Nyquist Generate Prompt
Tuning Fork
Variable Duration Silence Generator

Effect plug-in downloads


These plug-ins usually appear towards the bottom of the Effect menu in Audacity.

Amplify, Mix and Pan Effects
Amplify Left or Right Channel
Bass to Center
Center Pan Remover
Channel Mixer
Cross Fade In
Cross Fade Out
Fade In and Out
Panning
Panning (LFO)
Panning (random)
Pseudo-Stereo
Ramp Panning
Repair Channel
Stereo Butterfly (static)
Stereo Butterfly (LFO)
Stereo Butterfly (ramp)
Stereo Widener

Delay and Reverb
Bouncing Ball Delay
Bouncing Ball Delay with Panning
Bouncing Ball Delay with Tone Shift
Reverse Bouncing Ball Delay
Reverse Bouncing Ball Delay with Tone Shift
Chimes delay
Delay with High Pass Filter
Delay with Low Pass filter
Delay with Pitch Change
Delay with Stereo Flip
Delay with Tone Shift

Distortion Effects
Harmonic Enhancer
Tape Saturation Limiter

Dynamics Processing
Broadcast Limiter II
Broadcast Limiter III
Hyperexp
LevelSpeech
Limiter
Limiter (2)
Noise Gate
Pop Mute
Text Envelope
Filters
Band Stop Filter
Chebyshev Type I Filter
Classic EQ
Comb Filter
Customizable EQ
Desk EQ
High Pass Filter with q
High Pass Filter (LFO)
Hum Remover
Low Pass Filter (LFO)
Low Pass Filter with Q
Multiband EQ
Mutron
Notch Filter
Parametric EQ
Random Low Pass Filter
Resonant Filter
Shelf Filter
Ten Band EQ

Modulation Effects
Dual Tape Decks
Flanger (linear)
Isochronic modulator
Random Amplitude Modulation
Random Pitch Modulation
Ring modulator
Variable Tremolo

Sequencer Effects
Audio Selection Sequencer 2

Time, Pitch and Tempo
Change Speed by Semitones
Extract Audio
Insert Silence
Regular interval audio splitter
Sliding Speed Change
Tempo Change
Time Shifter
Trim / Extend
Trim Silence
Turntable Warping MS

Analyze plug-in downloads


These plug-ins usually appear towards the bottom of the Analyze menu in Audacity.
All plug-ins
ACX Check
Peak Finder rft
Pitch Detect
Regular Interval Labels

Selection Duration