An Audacity noise gate is for the quiet spaces between words. It turns down audio below a threshold, which can make pauses cleaner. It does not remove a fan that is still audible under the vocal, and it does not repair a clipped recording. Use it for the right problem and the vocal stays natural. Use it as a universal denoiser and the gaps get obvious fast.
Disclosure: Rys Up Audio makes RysUpNoise Pro. This guide explains the Audacity workflow first. The product recommendation is limited to the job each tool is built to do.
Noise gate or noise reduction?
Start by listening to a pause and then to a word. If the unwanted sound only appears between phrases, a gate can attenuate the pause. If the noise continues underneath the word, a gate cannot separate it from the voice because both are above the gate threshold at the same time.
| What you hear | Start with | Reason |
|---|---|---|
| Fan or room tone only between phrases | Noise gate | It reduces the quiet gaps while the vocal is below threshold. |
| Fan or hiss continues under every word | Noise reduction or cleanup | The unwanted sound overlaps the wanted voice. |
| A low pop at the start of a word | Clip gain and a high pass check | A gate is a level decision, not event editing. |
| Flat topped, distorted peaks | Rerecord when possible | Lowering a clipped file does not restore the missing waveform. |
Find the noise floor before touching the gate
Keep a short section that contains room sound but no voice. In Audacity, open Effect, Noise Removal and Repair, then Noise Gate. Use its noise analysis function on the isolated section when available. The current Audacity manual says the analysis uses the first half second of the selection to suggest a starting threshold.
That number is a starting point, not a magic setting. Play the quietest wanted consonants and word endings. The threshold must sit above the pause noise while leaving those quiet parts intact. If a breath vanishes, lower the threshold or reduce the amount of attenuation.
Use a gentle starting setup
For a spoken or sung vocal, begin with a modest level reduction rather than absolute silence. The current manual documents gate threshold, level reduction, attack, hold and decay controls. Its published ranges include threshold from minus 96 to minus 6 dB, attack from 1 to 1000 ms, hold from 0 to 2000 ms and decay from 10 to 4000 ms.
Those ranges are not a reason to start at an extreme. Try a threshold a little above the measured pause, level reduction around minus 12 to minus 24 dB, attack around 10 ms, hold around 50 ms and decay around 100 ms. Then adjust by ear. These are starting points for a short vocal test, not a promise that every recording needs the same values.
Increase hold when the gate chatters between syllables. Increase decay when the word ending snaps off. If the beginning of a consonant disappears, lower the threshold or use a faster attack. Always preview a phrase with a plosive, a soft consonant and a sustained vowel.
Keep the gate from chopping word endings
Solo listening can make a gate seem impressive because the room goes silent. Put the vocal back in the track before deciding. Short words and quiet endings often reveal the damage first. If the lyric becomes smaller or the breath pattern feels unnatural, back off the reduction.
Use clip gain or manual edits for one bad pause instead of forcing one threshold to solve the entire take. A gate should lower the unwanted gap, not decide where every phrase ends. Keep the original clip or an editable project so you can undo the choice later.
Know when Audacity noise reduction is the better move
Audacity's noise reduction workflow learns a profile from a noise only selection and applies that profile to the chosen audio. The official manual warns that aggressive settings can damage wanted signal and that changing, loud or overlapping noise may remain difficult. That makes it a different tool from a gate.
A useful order is to make the smallest cleanup pass that solves the constant noise, then use a lighter gate for the remaining pauses. Check the result at normal listening level and in the full arrangement. A clean solo track that loses consonants is not a clean vocal.
For a worked starting point, see how to remove background noise from vocals. That article owns the continuous noise problem. This page owns the Audacity gate workflow and its threshold, timing and preview decisions.
If the vocal sounds thin after low frequency cleanup, read how to high pass vocals without thinning before adding more gate reduction.
Where RysUpNoise Pro fits
RysUpNoise Pro is the relevant Rys Up path when the noise problem continues under the voice. Its live mode follows the session in real time. Its HQ Transfer workflow records a selected passage, runs a detailed denoise pass and lets you audition the original, denoised or removed signal before export. That is a cleanup workflow, not an Audacity style gate.
The current product record lists a $49.99 perpetual license and RysUpHub installation. It also lists AU, VST3 and AAX on Universal macOS plus VST3 and AAX on Windows 64 bit. Check the live product page for the current offer and format details before purchase.
Do not use RysUpNoise Pro as proof that a gate can remove a noise that sits under words, and do not use Audacity's gate as proof that a denoiser has cleaned the whole take. Diagnose the overlap first.
Run a five minute decision test
Duplicate a short phrase. Keep one dry reference. On the copy, analyze the pause, set a gentle threshold, preview the consonant and ending, then listen in the mix. Compare the gate bypassed, lightly reduced and heavily reduced. If the heavy version sounds cleaner only because the vocal got smaller, keep the light version.
Then test one phrase with continuous noise. If the gate leaves that noise under the word, move to a profile based cleanup or RysUpNoise Pro. Save the choice with the project so you can revisit it when the arrangement changes.
Choose the tool that matches the noise
Use Audacity Noise Gate for quiet gaps. Use a profile based cleanup for steady noise that overlaps the voice. Use RysUpNoise Pro when you want a live or HQ vocal cleanup workflow inside a supported host. If you need the paid Rys Up lineup together, review RysUpSuite.
Browse the current lineup and install through RysUpHub. The practical win is a vocal that keeps its words after the noise is reduced.
Sources checked September 11, 2026
The Audacity Noise Gate manual supports the control names, ranges and analysis workflow. The Audacity Noise Reduction manual supports the profile based distinction. RysUpNoise Pro claims and price were checked against the live product record and current update feed. This article does not report a controlled audio quality benchmark.