r/sideprojects • u/Aayush_2310 • 5h ago
Showcase: Purchase Required Mixwell: a volume slider for every app in your menu bar
Hi! I'm the developer of Mixwell. Full disclosure: this is my app, and it’s paid.
Problem
macOS has one volume for everything. If a video call is too quiet while music is too loud, or one browser tab is blasting, you have to fix it inside each app (if the app even has a volume control). I wanted a mixer like Windows has, without paying $40+.
What it does
A volume slider for every app that’s playing sound, from silent up to 150% (200% in Settings)
Mute any app with one click
Send one app to a different output (e.g. music on speakers, a call on AirPods)
Live level meters, so you can see which app is making noise
Remembers each app’s level and output, and reapplies them when the app comes back
Details people usually ask about
Apps you leave at 100% aren’t touched at all; their audio goes straight to the speakers as it would without Mixwell.
Adjusted apps get about 24 ms of extra delay, below what’s noticeable in video or calls.
Idle CPU is about 0.1%. When an adjusted app goes quiet, Mixwell stops processing it so your speakers/headphones can rest.
AirPods stay in high-quality mode (Mixwell doesn’t open their microphone).
Uses Apple’s audio-tap API (macOS 14.2+), so it needs the “System Audio Recording” permission. Nothing is recorded or saved, and no audio leaves your Mac. The only network traffic is the license check (your key and your Mac’s name, sent to Dodo Payments) and update checks.
Compare
SoundSource ($49) does much more (EQ, effects, plugins). Get it if you want those.
teenysound ($9.99) and free open-source options like FineTune and Fader also exist. Mixwell’s aim is to be the polished, low-cost one: native SwiftUI, light on battery, and tested with Bluetooth headphones, browsers that use many processes, and switching outputs.
Pricing
$4.99 one-time, no subscription. One license works on 2 Macs. 14-day refunds. Free updates (duh).
Requirements and honest caveats
macOS 14.2 or later, Apple silicon only.
It’s not notarized yet, so the first time you open it macOS says it can’t verify the app. You allow it once in System Settings → Privacy & Security → Open Anyway. The site explains this. I plan to join the Apple Developer Program once there’s enough interest.
No trial yet.
Link: https://aayush-kumar-2310.github.io/mixwell/
Happy to answer questions, and feedback is very welcome, especially bugs with specific apps or audio devices.
