Tightening noisy recordings with a noise gate: a practical guide
Every home studio has a noise problem, and in Australia the problem usually starts the same place as everywhere else: with the air conditioning, the fridge in the kitchen, the computer fan humming away behind the desk, and the truck that pulls up out the front of the house just as you hit record. A noise gate is one of the oldest, cheapest and most reliable tools for dealing with that mess, and learning to set it up properly is a rite of passage for any bedroom producer working out of a granny flat in Brisbane or a share house in Fitzroy.
The trick is that a noise gate does not remove noise. It silences whatever is below a threshold you set, which means it can clean up the gaps between vocal phrases, kill the hiss on a guitar amp sim and tighten the room tone around a snare. Used carelessly it sounds like a robot chopping words in half. Used well it is invisible, and that is the goal most engineers chase when they are mixing for triple j, FBi Radio or their own SoundCloud following.
What a noise gate actually does
A noise gate is a volume switch. It listens to the incoming signal and decides, sample by sample, whether the signal is loud enough to pass through or quiet enough to be muted. When the level drops below the threshold you set, the gate closes. When the level rises again, the gate opens. Everything in between is governed by timing controls that shape how fast and how smoothly the gate reacts.
The reason this matters in a real session is that every mic picks up something. A condenser mic in a Perth bedroom will record the ceiling fan, the neighbour's dog and the dampened rumble of the train line two streets back. A gate cannot erase those sounds, but it can mute the microphone when nobody is singing or playing, which leaves the rest of the mix breathing room that would otherwise be filled with hiss and rumble.
Gates come in two flavours. A hard gate snaps open and closed, which sounds abrupt and is rarely what you want on a vocal. A soft gate has a variable range or floor, meaning the closed state is not fully silent but reduced by a fixed amount, often around 10 to 20 dB. That small floor of residual noise keeps things sounding natural because the human ear expects to hear something in the gaps.
Dialing in threshold, range and floor
The threshold is the level the signal must cross to open the gate. Set it too low and the gate never closes, so the hiss remains. Set it too high and the gate chatters or clips the start of every word and pick attack. The usual approach is to push the fader all the way up, then drop it back until the gate only opens when you want it to.
The range or depth control sets how much the signal is attenuated when the gate is closed. A setting of zero means the gate does nothing, while a setting of minus infinity means total silence. Most engineers settle somewhere between minus 20 and minus 40 dB for vocals, leaving a faint bed of room sound underneath. This is why a soft gate usually beats a hard gate on sung phrases; the residual noise hides the moment the gate closes and the listener never hears the cut.
A useful trick when you are working in a noisy environment, such as a unit in Parramatta with thin walls or a townhouse in Geelong backing onto a main road, is to record a few seconds of silence at the start of every take. That pocket of room tone can be used as a reference for setting the threshold, because if the gate closes on the recorded silence it will close on the gaps during the performance too.
Attack, hold and release explained
Attack is how quickly the gate opens once the signal crosses the threshold. A fast attack, often one millisecond or less, is essential for percussive sounds like a snare or a kick drum, because any delay will soften the transient. A slower attack, somewhere between 10 and 50 ms, can smooth out the start of a sustained vocal or a pad, hiding any click at the moment the gate opens.
Hold determines how long the gate stays open after the signal has dropped below the threshold. Without hold, the gate will close on every breath between words, which sounds unnatural. A hold of 50 to 200 ms is common for sung vocals, while a snare might want almost no hold at all so the gate can shut tightly between hits.
Release shapes how quickly the gate closes once the hold time has elapsed. A short release can sound choppy, while a long release can blur the start of the next phrase. The standard advice is to set the release so the gate just fades shut before the next note or hit, and that often takes more than one pass through the song to land. Many producers in Adelaide and Hobart who mix late into the arvo will tell you the same thing: the release that sounds good at midnight is rarely the release that sounds good the next morning.
Where gates shine in a mix
Gates are not just for vocals. They are brilliant on close-mic'd drums, where each microphone picks up a different element of the kit and any spill adds a washy quality to the mix. Gating each drum mic individually tightens the kit, restores punch and reduces the bleed that gets exaggerated when you compress the overheads.
Gates also work well on electric guitars, particularly with single-coil pickups that hum, on bass DI tracks that hiss when the player takes their hand off the strings, and on any recorded instrument that has long gaps between notes. Even synth parts and sampled loops can benefit from gentle gating, since you can tame the sustain of a virtual instrument that rings longer than the arrangement needs.
One less obvious use is in voiceover and podcast production. With more Australian podcasters recording from home offices that share a wall with a kid's bedroom or a kitchen running a dishwasher, gating the host mic between sentences removes a lot of the background clutter before a single equaliser move is made. It is a low-effort first step that most editors forget.
Gates vs expanders and other clean-up tools
A gate and an expander look similar on a channel strip but behave differently. An expander reduces the gain of any signal below the threshold by a ratio you set, so a 2:1 expander turns a signal 10 dB below threshold into a signal 20 dB below. This creates a gentle, continuous attenuation rather than the binary open/closed behaviour of a gate, and is usually preferred on vocals and bass because the breathiness of a performance is preserved.
Spectral noise reduction tools, such as iZotope RX or Acon Digital Restoration, work by learning the profile of the noise and subtracting it from the recording. They are far more powerful than a gate on heavy, broadband noise like air conditioning hum, but they cost more, run hard on the CPU and need careful tweaking. For simple hiss and room rumble a gate is faster, free and built into most DAWs.
If you are on a budget, every FL Studio install includes the Fruity Limiter and the Gross Beat effect, while Reaper has the default ReaGate and ReaXcomp. For a few hundred Australian dollars you can grab FabFilter Pro-G 2, Waves NS1 Noise Suppressor or TDR Nova, which are the workhorses of most freelance mixers in Sydney and Melbourne studios.
Common mistakes that make gates sound worse
The most common mistake is gating from too far back in the signal chain. If the gate sits on the master bus or after heavy compression, it will duck the entire mix whenever a single element dips, which sounds like a bad auto-pump. Gates belong on individual tracks, inserted before compression and EQ so they only affect the source you want to control.
Another mistake is leaving the threshold on automatic. Auto-gating can be useful for dialogue cleanup, but for music it tends to follow the loudest peak and let everything else through, which is the opposite of what you want. Manual thresholding, even if it is rough, almost always beats a smart algorithm when the source is musical.
Finally, do not gate a track that already needs to be repaired. If a vocal is full of clicks, plosives and hum, a gate will simply chop those problems in half, leaving you with two new problems instead of one. Clean the recording first, then gate.
Working smarter inside the Melody Mix community
Because every home studio in Australia is laid out differently, the best gate settings are the ones you tweak by ear in your own room. Forums like Melody Mix are full of producers from Brissy to Perth trading their go-to gate chains and screenshots of the exact settings they used. The advertising page is where plugin developers often share tutorials, free presets and discount codes for the Australian market.
A good workflow is to print your gated tracks, listen back through cheap headphones, and ask a mate on the forum to listen critically. If they can hear the gate working, the settings are too aggressive. If they cannot hear the gate at all but the recording sounds tighter than before, the job is done.
| Tool | Best for | Strength | Weakness | Typical price (AUD) |
|---|---|---|---|---|
| Built-in DAW gate (ReaGate, Fruity Limiter) | Budget studios and quick fixes | Free, low CPU, easy to A/B | Limited look-ahead, basic metering | $0 |
| Expander (ReaXcomp, TDR Nova) | Vocals and bass | Smooth, natural attenuation | Won't fully mute a noisy gap | $0–$70 |
| Spectral noise reduction (RX Voice De-noise, Acon) | Heavy hum, broadband hiss, archival work | Surgical, profile-based removal | CPU heavy, can thin the signal | $50–$700 |
| Pro-grade gate (FabFilter Pro-G 2, Waves NS1) | Tracking and mixing | Side-chain, look-ahead, presets | Costs real money | $80–$250 |
A noise gate is one of those tools that looks simple on the surface and turns out to be deeper than it first appears. Start with a slow attack, a sensible hold, a release that fades with the performance and a floor that keeps a whisper of room tone underneath. Listen for the gate closing rather than opening, because the goal is silence in the gaps without drawing attention to the cut.
A producer in a Newtown share house and a producer in a Gold Coast garage will not end up with identical settings, and that is fine. The job of the gate is the same in both rooms: make the noise disappear, leave the music alone, and get out of the way of the song.