How to use effects and plugins in Audacity
Audacity uses effects in two ways: as realtime effects that sit on a track (or on the whole mix) and process the audio as it plays, and as destructive effects that you apply once to a selection and that change the waveform. Plugins you install from MuseHub show up in both places once Audacity has validated them, which it offers to do the next time it starts. To add a realtime effect, open the Realtime effects panel (press E), click Add effect and choose one; its controls open straight away.
This guide covers what you need, installing plugins through MuseHub, both ways of using an effect, the mistakes that make a plugin “not work”, a few habits that make effects sound better, and which free plugins to start with.
Audacity and effects to start with
What you need
- Audacity 4 — free, for macOS, Windows and Linux. Audacity 4 loads VST3 plugins, plus Audio Unit plugins on macOS and LV2 plugins on Linux; the VST2, LADSPA and Vamp plugins Audacity 3 loaded do not work in it, so check a plugin’s format before you buy it.
- The MuseHub app — free. It installs plugins into the folders Audacity scans and keeps them updated.
- Something to process. A vocal take, a podcast recording, a guitar part. Effects are easier to learn on a sound you know.
Step 1: Get Audacity through MuseHub
If you do not have Audacity yet, install it from the Apps section in MuseHub — it downloads, installs and can open the app for you. If you already have Audacity 3, Audacity 4 opens your existing projects after converting them to its own format, so there is no reason to stay behind. Audacity is also available from audacityteam.org; MuseHub adds the plugins and the automatic updates.
Step 2: Install plugins from MuseHub
Open the Plugins section in MuseHub. Free plugins install with a click; paid ones after checkout. MuseHub puts each plugin in the standard location for its format, so there is nothing to move by hand.
A good free starting set:
- MuseFX — Muse Group’s free collection covering the everyday jobs: level, tone, pitch correction, harmony and a mastering chain.
- Soundly Place It and Shape It — free tools for putting a sound in a space and sculpting its character, made for sound design and dialogue.
- Panagement 2 and Renegate from Auburn Sounds — free stereo placement and a free gate.
Step 3: Restart Audacity and validate the plugins
Audacity checks for new plugins when it starts and asks to validate them before use. Click Validate: if you choose Skip this time, the new plugins stay disabled and seem to be missing. If Audacity was already open while you installed, you can also open Effect ▸ Plugin manager and click Rescan plugins.
Validated plugins are listed under Add effect, grouped by format and then by maker: VST3 or AudioUnit, then the developer’s name. Audacity’s own effects are under Audacity.
Step 4: Add a realtime effect to a track
Realtime effects are the way to use plugins for mixing, because you hear the change immediately and can keep adjusting.
- Select the track you want to process.
- Open the Realtime effects panel: press E, or click Effects on the track.
- Click Add effect and choose the plugin. It goes into the track’s effect stack and starts processing on playback.
- The effect’s controls open as soon as you add it; click the effect’s name to reopen them later. Many plugins open a window with their own graphical interface; you can keep working in the main Audacity window while it is open.
- Press play and adjust. Realtime effects always apply to the entire track, they do not change the recorded waveform, and they are applied automatically when you export — you do not need to “render” them first.
Two controls in the stack are worth knowing on day one. The power button next to an effect (or next to the whole stack) bypasses it, which is how you compare with and without. The down arrow at the right of an effect opens a menu where Remove effect takes it out.
At the bottom of the panel is the Master section. Effects there process the whole mix — every track summed, after their own effects and faders — both while you play and when you export, which is where a limiter or a final EQ belongs.
Step 5: Apply a destructive effect to a selection
Some jobs are one-off edits rather than ongoing processing: normalizing a file, removing noise, fading a region, changing pitch or tempo. For these, select the audio, choose the effect from the Effect menu, use Preview to hear it, then apply. The waveform changes; undo (Ctrl+Z / ⌘Z) reverses it. Noise reduction in Audacity is a destructive effect used this way.
Step 6: Export when you are done
Realtime effects stay live until the end: they are applied when you export, so there is nothing to render first. Audacity 4.0 has no menu command that commits a track’s effects to its waveform the way Mix and Render did in Audacity 3. If you need the processed sound as audio to keep editing, export it and import the result.
Common mistakes
- The plugin is not listed. It probably has not been validated yet. Restart Audacity and click Validate, or use Rescan plugins in Effect ▸ Plugin manager. If it still does not appear, check its format: Audacity 4 loads VST3, AU on macOS and LV2 on Linux; VST2-only plugins will not show.
- Nothing changes when I move the knobs. The effect is bypassed (power button off), it is on a different track than the one playing, or its mix control is at zero.
- Everything sounds squashed or too quiet. Check the Master section: an effect there processes every track at once, in playback and in the export.
- Playback stutters. Realtime plugins use CPU. Bypass what you are not adjusting.
- Using a destructive effect for a mixing job. Compression, EQ and reverb belong in the realtime stack, where you can keep changing them. Save destructive effects for edits you want made once.
Habits that make effects sound better
- Order matters. In a stack, effects run top to bottom. The usual order is corrective first (gate, EQ cuts), then dynamics (compression), then color (saturation, EQ boosts), then space (reverb, delay). How to use a compressor and the principles of EQ explain what each does.
- Bypass to check. Toggle the power button every few minutes. The ear adapts to a change quickly, and the comparison keeps you honest.
- One plugin per job. A single EQ with three moves is easier to hear and adjust than three plugins doing overlapping things.
- Start free. MuseFX, Soundly and Auburn Sounds cover more than beginners expect; the best free VST plugins lists what else costs nothing.
FAQ
Next steps
With plugins running, noise reduction in Audacity and AI audio editing in Audacity cover the two cleanup jobs most recordings need (the AI plugins still need Audacity 3), and recording a turntable into Audacity covers capture. If you are weighing Audacity against other editors, the best free audio editing software compares them. For a structured video course, MuseHub carries Audacity Explained. Get Audacity and the free plugins in one place — download MuseHub free.
