audio lab

Audio Editing Guides

Short, task-focused guides for the questions that come up around Audio Lab's tools, each one pointing to the exact tool and settings to use.

Music & remixing

Music & remixingChange a Song's Key Without Changing Tempo

Change a song's key without changing tempo: the semitone math, fine-tuning with cents, and why extreme shifts change how a voice sounds.

6 min read · Updated September 25, 2026Music & remixingHow to Crossfade Two Songs

Crossfade two songs into one smooth transition. Learn equal-power vs. linear curves, how long a crossfade should be, and why to match loudness first.

5 min read · Updated September 25, 2026Music & remixingExport Stems to a DAW, Sample-Aligned

Export stems to a DAW and keep them in sync: split a song, export sample-aligned WAVs, match sample rates, name the files and check for bleed.

6 min read · Updated September 25, 2026

Voice & cleanup

Voice & cleanupReduce Background Noise in a Recording Without Damaging Speech

Reduce background noise in a recording without damaging the speech underneath it. Profile the noise, clean it conservatively, then check what you removed.

6 min read · Updated September 25, 2026Voice & cleanupNormalize Podcast Loudness and Check True Peak

Normalize podcast loudness to the right LUFS target and keep true peak safe. Covers LUFS vs. peak, integrated and short-term loudness, and targets.

5 min read · Updated September 25, 2026

Formats & conversion

Formats & conversionFLAC Cover Art Not Showing? Causes and Fixes

FLAC cover art not showing in your player? See how the PICTURE block stores artwork, which picture type and image size work, and how to fix it.

6 min read · Updated September 25, 2026Formats & conversionHow to Convert M4A to MP3

Convert M4A to MP3 free, right in your browser — no upload, no account. Works for iPhone voice memos too, with batch conversion for several files at once.

5 min read · Updated September 25, 2026Formats & conversionMP3 vs. FLAC vs. WAV

Compare MP3, FLAC, and WAV on quality, file size, metadata, and compatibility, plus where AIFF, OGG, Opus, and M4A fit in, so you can pick the right format.

6 min read · Updated September 25, 2026

Effects & mixing

Effects & mixingWhat Is Daycore? The Opposite of Nightcore

The opposite of nightcore is called daycore: slower, deeper, and calmer. See how daycore vs. nightcore actually compares, the pitch math, and how to make one.

5 min read · Updated September 25, 2026Effects & mixingReverb Decay vs. Wet Mix

Reverb decay vs. wet mix: both shape a reverb but do different jobs. See what each parameter does, with starting points for vocals, podcasts and drums.

5 min read · Updated September 25, 2026

Guides built around real tasks

Every guide here starts from a specific problem rather than a general topic — how to convert M4A to MP3, how to normalize podcast loudness, or how to change a song's key without changing its tempo — and walks through the actual steps, including which settings matter and why. Comparison guides like MP3 vs. FLAC vs. WAV exist for the decisions that come before you touch a tool at all, such as which format to export to in the first place.

Each guide links to the tool built for that job, so once you understand the steps, you can go straight to the audio converter, volume booster, pitch shifter, or whichever tool applies and run through it yourself. Nothing here requires a separate download or account beyond what the tool itself already needs.

How a guide is different from a tool page

A tool page documents everything a tool can do. A guide is narrower on purpose: it answers one question — cleaning background noise without damaging speech, crossfading two songs together, or exporting stems to a DAW — with a specific, tested path through the settings. If you already know which tool you need, its own page has the full picture; if you're not sure how to approach a task, a guide is the faster way in.