The video editor's Mac audio: timeline vs notifications

For a video editor, the problem is two different jobs sharing one volume. Your timeline needs a steady, calibrated reference level you can trust; Slack, Mail, Messages, and the browser need to be quiet enough that a ping never crashes into a fade you're judging. macOS gives you one master output, so lowering the distractions lowers your edit too. The fix is to split them: silence pure notification sounds with the free Focus and Notifications settings, and use a per-app volume app to keep every other app low while your NLE stays exactly where you set it.

If you cut video on a Mac, you know the moment. You're riding a music bed under dialogue, or checking a transition against the room, and a Slack notification fires straight into your monitors at full alert volume. Now you're not sure what you just heard. Turn the Mac down and your timeline drops with everything else. Turn it back up for playback and the next ping is loud again. The two things you want — a trustworthy edit level and a quiet background — are fighting over a single slider.

First, separate two problems that feel like one

"Notifications are too loud while I edit" is really two problems, and only one of them costs money to solve.

The first is notification alerts — the little sounds macOS plays for a new message, a calendar reminder, a completed download. The second is actual app audio — a Slack huddle or Discord call, a YouTube reference clip, a Music track you keep going between sessions, a client's video playing in a browser tab. macOS treats these very differently, so the right tool depends on which one is biting you.

Fix the notification sounds for free

For pure alert sounds, you don't need anything extra. macOS has two free levers, and every editor should set both:

Turn on a Focus. Click Control Center in the menu bar, choose Focus, and turn on Do Not Disturb (or a custom "Editing" Focus). This mutes notification sounds and hides the banners so they don't steal your attention either. In System Settings > Focus you can build an Editing Focus that still lets a specific person or app through — useful if you need your producer's messages but nothing else.

Or silence one app's alerts. If you only want to hush a couple of noisy apps and keep the rest, go to System Settings > Notifications, select the app, and uncheck "Play sound for notifications." The banner still appears; the sound doesn't. This is granular and permanent, which is nice for something like Mail that you never need to hear.

That's the honest first move. If notification chimes were your whole problem, you're done — no purchase required. The catch is what these settings don't touch.

Where the free settings stop: real app audio

Do Not Disturb and Focus modes silence notification banners and their alert sounds. They do nothing to the audio an app actually plays. A Slack huddle still comes through at full volume. A Discord call, a reference clip on YouTube, a Music track, a client review link playing in Safari — none of that is a "notification," so Focus leaves it alone. And there is still no macOS setting anywhere that lets you say "keep Final Cut at reference level, but put everything else at 20%."

That's the part that actually derails an edit. You want the room quiet and your timeline honest at the same time, and the two live on the same master fader. This is the gap a per-app volume app fills.

Give every app its own level

A per-app mixer sits at the macOS audio layer and gives each running app an independent volume — the thing Apple never shipped. Your NLE stays at the reference level you calibrated; Slack, Discord, browsers, and Music each get their own level, set once. Nothing you do to the quiet apps moves your timeline. Tools in this space include Background Music (free, open source), SoundSource by Rogue Amoeba (paid, deep, with EQ), and Fader (paid, keyboard-first). They all set per-app levels; they differ mostly in how fast you can reach the control mid-edit.

The two rows are complementary, not competing. Use Focus for the chimes; use a per-app mixer for the audio those apps actually make. An editor typically wants both.

Why the keyboard matters at an edit bay

Editing is already a keyboard-heavy job — J, K, L, blade, ripple, in and out points. The last thing you want is to break flow, drag to the menu bar, hunt for a row, and drag a slider every time the mix around your timeline needs a nudge. A menu-bar list is fine to set up once, but it's slow to reach on the tenth interruption of the afternoon.

That's the bet behind Fader: the fastest controller you own is the keyboard already under your hands. Hit a toggle hotkey and the keyboard becomes a mixer — one column of letter keys per app — so you can drop Slack and the browser to a whisper, or mute them outright, without leaving your NLE. A "playback" pass where everything but the timeline goes quiet becomes a keystroke, and so does bringing the room back for the next call. You set the levels once; after that it's muscle memory, not a mouse trip.

A practical setup for editing days

Here's a setup that keeps a timeline honest without going dark on the world:

Build an Editing Focus that mutes notification banners and sounds but lets your producer or a specific channel through. Silence Mail's notification sound outright in System Settings, since you'll read it later anyway. Then, in a per-app mixer, park your NLE at 100% (your reference), Music around 15–20% for a working bed, Slack and the browser low, and bind a mute key to each so a surprise call is one keystroke away from silence. During critical listening — a mix pass, a level check — hit the toggle and drop everything but the timeline. This is the same idea as our guide on keeping system alerts loud while music stays quiet, just pointed the other direction: here the edit is what has to stay clean.

If your specific pain is the NLE itself — timeline playback that's louder or quieter than the rest of the system — the per-app approach is the same. See controlling Final Cut Pro playback volume vs system audio for the app-specific version; the same idea applies to Premiere and DaVinci.

Bottom line

Timeline and notifications are two jobs sharing one volume, and macOS won't split them on its own. Silence the alert sounds for free with a Focus or the per-app Notifications setting — that solves the chimes. For everything else that makes real noise around your edit, a per-app mixer lets you keep your NLE at a trustworthy reference level while the rest of the room sits low. If you want to ride those levels without lifting your hands off the keyboard, that's exactly what Fader is built to do.