Getting Started With Audio Editing in Audacity
Audacity is free, which means most people download it and immediately hit confusion. The interface hasn't changed dramatically in years, but that's not necessarily a bad thing. The cut function lives in a few different places depending on what you're trying to do, and mixing them up is the fastest way to lose work or waste ten minutes figuring out why your selection didn't delete. Open your project. Drag the WAV or MP3 file into the window, or use File > Import > Audio. Wait for the waveform to load fully—don't start editing until the thin gray lines become solid dark shapes across the track. If you skip this, Audacity might be rendering still, and clicks won't register properly. Select the portion you want removed. Click and drag on the waveform, or place your cursor where the cut should begin, hold Shift, click where it should end. The selected region turns a darker color. Press Delete. The gap closes automatically—Audacity does a soft truncate, meaning the clip after your selection slides left to fill the space. This is cut, not remove in the traditional sense. The two feel identical at first but behave differently when you're working with multiple tracks or applying effects later.
If you want to cut and keep the selection in your clipboard instead of deleting it, press Ctrl+X (Cmd+X on Mac). This is probably the most used keyboard shortcut in the program. Use it constantly. It saves you from right-click menus that take three seconds to appear. There's also the Razor tool, the icon that looks like a pair of scissors in the toolbar. Click it, then click anywhere on the waveform. This splits the track into two separate segments without removing anything. It sounds like the same thing as a selection plus delete, but it's not. The razor tool creates a hard discontinuity in the waveform data. The selection-delete method just shifts adjacent regions together. For a simple trim, either works. For precision work where you need to move one segment independently of another, the razor tool is the only option. I've seen people waste twenty minutes trying to isolate a single word in a long recording using only deletion. They couldn't grab the word and move it because they hadn't cut the track at both ends first. One razor click before, one after, then select the middle section and delete. Done.
When Basic Cutting Isn't Enough
Here's something most tutorials skip: when you delete a selected region, Audacity doesn't always close the gap cleanly. If there are two or more tracks stacked and you delete something on one track without affecting the others, the remaining tracks keep playing at their original timestamps. The silence gap only appears on the track you edited. This trips people up constantly. They think the edit failed because audio from other tracks is still playing over the deleted section. It's not a bug. It's how multitrack works. Play the whole project back to verify what actually happened instead of judging by the waveform display alone. Another thing nobody warns you about: if you have noise reduction or any effect applied to a track, and you delete a selected region, the effect parameters are recalculated across the remaining audio. The result can sound noticeably different from before, even though you only removed a small section. I ran into this last year on a podcast edit where the voice had a light noise gate. After cutting out a five-second cough, the remaining speech sounded suddenly quieter and harsher around 3kHz. The gate had reanalyzed the full remaining clip and changed its threshold. The fix was to duplicate the track first, cut the copy, then the results and manually adjust the gate settings on the edited version. The undo history in Audacity is limited—usually around fifty steps, sometimes fewer depending on file size and system memory. This isn't theoretical. I once cut thirty minutes of an interview in one sitting, applied effects, exported, realized I'd accidentally deleted a key question, and couldn't undo back that far. The only recovery was the backup .aup3 project file I'd saved earlier. Always save a project copy before a big editing session. It takes four seconds and has prevented more lost work than any other habit.
Get the Full Details
Advanced Techniques That Actually Matter
If you're editing speech and want to remove silences automatically, there's a built-in tool for that: Analyze > Silence Detection. Set a threshold—usually around -40dB for normal conversation—and Audacity marks all gaps below that level. You can then choose to remove them in batch. This is useful for long-form content like lectures or interviews. For music or ambient audio, it creates unnatural jumps, so don't use it blindly. The Truncate Silence effect goes further. It doesn't just remove silence—it shortens all gaps below a threshold to a set duration. Set the threshold to -50dB and the truncation length to 0.3 seconds, and quiet breaths between words become barely perceptible instead of awkward pauses. This is standard practice for radio and broadcast work. The catch is that overusing it makes speech sound robotic. I usually apply it at 30% intensity by running the effect, exporting, and doing a quick A/B comparison against the unprocessed version. For precise cuts on waveforms with rapid transients—percussion hits, consonant sounds like "t" and "p"—zoom in. Use Ctrl+I to zoom in vertically, or scroll while holding Ctrl. At normal zoom, a ten-millisecond cut can look like zero movement on the waveform. You'll slice through the attack of a sound and leave a click or pop in the export. I learned this the hard way on a drum edit where I kept hearing a faint tick every time a snare hit was shortened. The waveform looked clean at 100% zoom. At maximum zoom, the transient was clearly being truncated mid-cycle. Moving the edit point by three samples fixed it. Sample-level editing is the difference between a professional cut and a sloppy one, and Audacity supports it natively—you just have to zoom far enough to see it.
There are scenarios where Audacity simply won't work well. If you're editing a multi-hour live recording with dozens of overlapping tracks, Audacity will choke. It's not designed for large multitrack sessions. Pro Tools, Reaper, or even GarageBand handles that better. Audacity's strength is single-track or light multitrack work: podcasts, voiceovers, field recordings, simple music edits. If your project exceeds roughly forty tracks or runs longer than three hours at standard sample rates, consider moving to a DAW before you start. You'll save hours of lag and crash recovery time. Export settings matter too. Audacity defaults to WAV for internal editing, which preserves quality. When exporting for final delivery, choose the right format. MP3 at 192kbps is acceptable for podcasts. For anything requiring mastering or further processing, export as 24-bit WAV. Never export multiple times from MP3 to MP3—that's lossy compression compounding, and the artifacts add up quickly. One export at the final quality setting is the rule.
