How to Record Audio-Only Lessons Using Audacity (Free)

Go to audacityteam.org/download and download the version for your operating system. Installation is straightforward on all platforms. On macOS, you may need to allow the app in System Settings under Privacy & Security the first time you open it. Once installed, open Audacity. You'll see an empty waveform area and a toolbar along the top.

In the toolbar, find the audio input dropdown (it shows a microphone icon). Select your external microphone — a USB microphone like the Audio-Technica ATR2100x or Blue Yeti is ideal, but even a headset microphone will produce better results than a built-in laptop mic. If your microphone doesn't appear in the list, check that it's plugged in and recognized by your operating system, then click Transport > Rescan Audio Devices.

Set the input channels to "1 (Mono)" unless you have a specific reason to record in stereo. Voice recordings are mono by nature, and mono files are half the file size. Your students won't hear a difference in a narrated lesson.

Go to Edit > Preferences > Quality (on macOS: Audacity > Settings > Quality). Set the default sample rate to 44100 Hz and the sample format to 16-bit. These are CD-quality settings — more than sufficient for voice recording and compatible with every course platform and audio player. Higher sample rates produce larger files without audible improvement for spoken content.

Before you press record, do a test: click the microphone level meter at the top and speak at your normal teaching volume. The meter should peak between -12 dB and -6 dB. If it's too low, move closer to the microphone or increase the input volume slider. If it's clipping (hitting the red zone), back away from the mic or lower the input level.

When you're ready, click the red Record button. Leave three seconds of silence at the very beginning — sit still, don't speak. You'll use this silence later to create a noise profile for cleanup. Then teach your lesson as you normally would. Speak as if one student is sitting across from you, not as if you're reading to an auditorium. If you stumble, pause for two beats and restart the sentence. You can edit out the mistake later, and the pause makes the cut point easy to find in the waveform.

This is the step that transforms a home recording into something professional-sounding. First, select those three seconds of silence you left at the beginning of the recording. Go to Effect > Noise Reduction and click "Get Noise Profile." Audacity analyzes the selected silence to learn what your room's background noise sounds like — the hum of your computer fan, a distant air conditioner, electrical buzz.

Next, select your entire recording (Ctrl+A or Cmd+A). Go to Effect > Noise Reduction again. Leave the default settings (Noise Reduction at 12 dB, Sensitivity at 6, Frequency Smoothing at 3) and click OK. Audacity subtracts the noise profile from the recording. The result is noticeably cleaner audio with the ambient hum removed. If you still hear residual noise, you can run the effect a second time, but be cautious — too much noise reduction makes your voice sound hollow and metallic.

Select the entire recording again and go to Effect > Normalize. Set the peak amplitude to -1.0 dB and check "Remove DC offset." Click OK. Normalization adjusts the overall volume so your loudest moment hits -1 dB, bringing the rest of the audio up proportionally. This ensures your lesson plays at a consistent, comfortable volume — no one has to reach for their volume knob halfway through.

If different sections of your recording vary significantly in volume (you leaned away from the mic at some point, or your energy shifted between the introduction and the main content), consider applying the Compressor effect before normalizing. Go to Effect > Compressor, use the default settings, and apply. Compression reduces the gap between your quietest and loudest moments, making the overall volume more even.

Go to File > Export Audio. Choose MP3 for the smallest file size and broadest compatibility. Set the bit rate to 128 kbps for voice content — this produces clear audio at roughly 1 MB per minute of recording. If you want lossless quality for archival purposes or plan to do further editing later, export as WAV instead (the file will be roughly ten times larger). Name the file clearly: Module-2-Lesson-3-Body-Scan-Meditation.mp3 is more useful than recording-final-v2.mp3 when you're managing a full course.

The biggest factor in audio quality isn't your microphone — it's your room. Hard walls, bare floors, and large windows create echo and reverb that noise reduction can't fully remove. If you're recording in a home office, close the door and windows, turn off fans and appliances, and add soft surfaces where you can. A closet full of clothes is, no exaggeration, one of the best recording environments available in most homes. Blankets draped over a desk-mounted microphone stand also work surprisingly well.

This is easy to forget and hard to fix afterward. The silence at the beginning gives Audacity a clean sample of your room's ambient noise, which it uses to subtract that noise from your entire recording. Without this sample, noise reduction is less effective. Build it into your habit: press record, sit still and quiet for a slow count of three, then begin your introduction.

Rather than trying to get a perfect single take, record the tricky parts two or three times. In Audacity, you can simply keep recording and speak the corrected version immediately after the mistake. When you edit, delete the bad take and keep the best one. This is faster than stopping, repositioning your cursor, and starting a new recording session. Professional voiceover artists work this way — they call it "punching in" and it's faster than chasing perfection in a single pass.

Menus are nested deeply, the toolbar icons are cryptic, and the Effects menu lists dozens of options without clear guidance on which ones you actually need. If you're used to modern, polished software, the first impression can be discouraging. The good news: for a repeatable audio workflow, you'll use the same five or six functions every time, and the interface fades into the background once you know where things are.

Audacity has no real-time effects monitoring. You apply an effect, listen to the result, and undo if you don't like it. Tools like GarageBand or Adobe Audition let you preview effects in real time before committing. For noise reduction specifically, the trial-and-error loop in Audacity adds a few minutes to each editing session until you find settings that work for your recording environment.

This is an audio-only tool. If you need to record your screen, your face, or any visual content, Audacity won't help. For video lessons, look at Loom or OBS Studio instead. And if you want AI-powered audio cleanup without the manual steps, Descript handles that more elegantly, though it costs $24/month for the Pro plan.