Microphone gain controls how much your mic amplifies your voice before it’s recorded, and it’s one of the few audio settings you can’t fully fix afterward. Set it too high and the first loud laugh distorts. Set it too low and you’ll be boosting the whole recording in the edit, background hiss included.
There are two ways to set it. With manual gain, you pick a level with a knob or a software slider, and it stays there until you change it. With automatic gain, the mic, wireless kit, or call app adjusts the level for you while you talk. Wave Go supports both: Auto Gain adjusts your level as you speak, and turning it off in the Wave Go app gives you six manual gain steps. On Wave:3 MK.2 and Wave XLR MK.2, Auto Gain Wizard sets your gain once from a short voice sample, then leaves it fixed.
A microphone turns your voice into a very weak electrical signal. Gain is the amplification the preamp, the circuit inside your mic or audio interface, applies to that signal so it’s strong enough to be converted into digital audio. It’s measured in decibels (dB), and more gain means a louder signal going into the recording.
Gain and volume are separate controls. Volume changes how loud you hear audio in your headphones or speakers. Gain changes the level that gets recorded or sent to your stream or call, so it affects everything after it.
Digital audio has a hard ceiling, called 0 dBFS (decibels relative to full scale). When your voice pushes past it, the tops of the waveform get cut off and the audio distorts. This is called clipping. A slightly quiet recording can be raised later, but clipped audio can’t be repaired. For speech, a common target is peaks between -12 and -6 dBFS on your level meter, which leaves room for laughs and sudden shouts.
Gain also raises everything else the mic picks up. Room noise, computer fans, and the mic’s own hiss all get louder as you turn gain up, so the goal is enough gain for a strong voice signal, not as much as possible.
Automatic gain control, or AGC, is the technical name for auto gain and the term you’ll see in app settings and spec sheets.
AGC continuously measures your voice level and compares it to a target. When you’re louder than the target, because you leaned in or raised your voice, it lowers the gain. When you’re quieter, it raises the gain until you’re back near the target.
Two timings shape how that sounds. Attack is how quickly AGC lowers the gain when you get loud. Release is how quickly it brings the gain back up when you go quiet. A fast attack catches sudden loud moments sooner, and a slower release keeps the level from jumping around between words. Some AGCs also stop raising the gain when the signal drops below a threshold, so silence isn’t boosted, though how well this works varies by device and app.
You don’t have to set anything before you start recording. AGC is built into most video call apps and a growing number of mics and wireless kits.
AGC has trade-offs. In a noisy room, it can raise the gain during pauses, so a fan or air conditioning gets louder each time you stop talking. If it reacts too quickly, you can hear the volume rise and fall, an effect called pumping. It also narrows the gap between loud and quiet moments, which suits speech but not music or performances where that contrast matters.
With manual gain, you set the level once and it stays fixed for the whole recording. Quiet passages stay quiet and loud ones stay loud, so the recording keeps the dynamics of your performance.
Getting the level right is up to you. Set it too high and the recording clips when someone laughs or talks loudly near the mic. To set it, speak at the loudest level you expect, watch the meter, and lower the gain until those peaks stay below the top. Then record a short test and listen back.
With XLR Dock MK.2, Wave XLR Pro, or the two mics above, Auto Gain Wizard handles that step for you. You read a few sample sentences, and it sets your gain for clear speech and for the onboard DSP effects. After that, the gain stays fixed like any manual setting. Start it from Wave Link, or on Wave XLR MK.2 by holding the control dial for five seconds.
Use AGC when you can’t control much else. If you’re walking and talking, vlogging on your phone, or holding a mic out to someone on the street, your distance and volume keep changing, and AGC adjusts to match. It’s also a good fit for calls and meetings, where an even level matters more than a natural one, and for any recording where you can’t watch a meter.
Background noise is the most common reason. In a café, a busy venue, or a room with the AC running, a low fixed level keeps the background from rising every time you pause. Manual also makes sense at a desk or podcast table, where your distance to the mic barely changes, and for music or performance, where the difference between soft and loud is part of the sound. If you plan to edit, a steady level is easier to process, and it avoids the drift and pumping you sometimes hear in AGC recordings.
Many call and chat apps run their own AGC, separate from whatever your mic is doing. Each app labels it differently:
App AGC helps with a basic mic that has no automatic mode. If your mic already runs its own AGC, or you’ve set a manual level, the app adjusts on top of it, which is a common cause of uneven levels and pumping. Let one thing control your gain. In both cases, turn the app’s AGC off so your mic setting is the only one in play.
What does AGC stand for?
Automatic gain control. It’s the standard term for any feature that adjusts mic level for you while you talk.
Is automatic gain bad for audio quality?
No. AGC is the better choice when you’re moving around or can’t watch your levels. It struggles mainly in noisy rooms and with music, where manual gain sounds cleaner.
Is auto gain the same as a limiter?
No. A limiter only acts when your signal goes above a set ceiling and leaves everything below it alone. AGC moves your overall level up and down the whole time. Some mics use limiting instead of AGC to prevent clipping while keeping your level where you set it. Clipguard 2.0 on Wave:3 MK.2 and Wave XLR MK.2 is one example.
Can I fix clipped audio in editing?
No. Clipping cuts off the tops of the waveform, and that part of the audio is gone. Turning it down afterward gives you a quieter clipped recording. Leaving headroom while you record is the only way to avoid it.
Should I use auto gain for a podcast?
If you’re seated at a table, a fixed level usually sounds more natural. Set it by hand, or run a one-time calibration like Auto Gain Wizard, and leave it. If you’re recording on the move, AGC is the easier option.
If you’re moving or unsure, start with AGC. If the room gets noisy, switch to a low manual setting. Either way, record a short test before the real take. Once your levels are set, our tips on making your microphone sound better cover mic placement, room treatment, and processing.
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