Updated October 2026 · Audio basics for beginners
Gain is the amount a microphone signal is boosted before it is recorded. Set it so the loudest words peak comfortably below the top of the meter, with room for surprises. Too little gain forces you to boost noise later, and too much clips the voice in a way that cannot be undone.
Gain is one of the first controls a recordist touches, and one of the most misunderstood. Many beginners treat it as a volume knob for the listener, and then wonder why the recording is noisy or distorted. Gain is not the volume of the final file. It is the amount the signal is boosted at the start of the chain, which decides how much of the microphone’s signal reaches the recording.
This post explains the difference between gain and volume, how gain affects noise and distortion, and a simple way to set it correctly for speech and music.
Volume is what you hear when you play a recording, and you can change it at any time. Gain is applied during recording, and it decides how strong the signal is when it is stored. Once a signal has clipped, turning the volume down does not restore the lost detail. That is why gain must be set before you press record, not fixed later.
Think of gain as the size of the sample you collect. If the sample is too small, you must enlarge it later, which enlarges any flaws too. If it is too big, the top is cut off.
A recording with too little gain is quiet, and the beginner often raises the level during editing. Raising a quiet recording also raises its background noise, hiss and room sound. The result is a recording that sounds thin and noisy, even though the voice itself was fine. The fix is to record with more gain, closer to the microphone, rather than relying on boosting later.
A recording with too much gain clips when the loudest words exceed the maximum the system can store. Clipping sounds harsh, crackly and distorted, and no software can fully restore the peaks that were cut off. The safe approach is to leave room for sudden loud sounds, such as a laugh, a shout or a plosive pop, which can push the peaks higher than normal speech.
Different microphones give different signal levels, and some need more gain than others. A dynamic microphone usually needs more gain than a condenser, which is one reason a dynamic can sound quieter at the same setting. Check the level for each microphone you use, rather than assuming the same setting will work.
Every recording has some noise from the electronics, and more gain brings that noise up along with the voice. The aim is to set the gain high enough that the voice sits well above the noise floor, but not so high that the peaks clip. A close microphone helps, because it gives a stronger signal for the same gain.
Phones set gain automatically in many recording apps, which can make the first attempt sound fine and the next one different. Some apps raise or lower the level on their own as you speak, so a quiet passage may be boosted and a loud one held back. Check whether your app has an automatic level control, and if it does, test whether you prefer it or a fixed setting. A fixed level gives a steadier sound across a long recording.
When you record on a phone, keep the phone at a steady distance and set the level with a short test first. The automatic behaviour is only a substitute for a steady setup, not a replacement for one.
A practical habit is to note the gain setting next to each session in your project notes, along with the microphone and the distance. When a later recording sounds different, the notes show whether the gain changed, the position moved or the room was different. Over time, the notes become a reliable template, and the first test of each session takes less time.
Gain settings vary between interfaces, microphones and recording software, and the controls may be labelled differently. The principle is the same across all of them. Learn the principle, then find the control on your own equipment.
A short test recording shows you whether the gain is right. The Vocal Checker shows clipping, noise and level problems in a recording you own, which helps you judge a test. The Tunedzy Go page covers cleaning a phone recording. For the wider basics, read the beginner basics post in this series.
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No. Gain is applied during recording, while volume is how loud you hear the file.
You can make it louder, but you also raise the noise. Record at a better gain next time.
Clipping cannot be fully repaired. Re-record with lower gain, leaving room for sudden peaks.
Comfortably below the top of the meter, with room for surprises such as laughs or pops.
