Troubleshooting

Common issues and how to sort them out. If your problem isn’t here, get in touch — and if mixr shows you something that isn’t true, we especially want to know.

An app’s volume slider isn’t showing up

mixr shows apps that are currently producing audio. If an app isn’t listed, it may not be playing anything right now — look under recent apps to find it, or pin it so it always appears.

If no apps show up at all, check that you granted mixr the audio permission during setup (System Settings → Privacy & Security → Audio). Without it, mixr can’t see per-app audio. See: First launch & permissions

mixr says “No mute” for my microphone

This means your device doesn’t allow a software mute — its controls live on the hardware. This is common with professional audio interfaces. mixr won’t fake a mute that wouldn’t work; instead it points you to the real control (a hardware dial, or the device’s companion app). See: Why can’t mixr mute my audio interface?

My microphone keeps changing on its own

That’s macOS switching your input to whatever connected last — and it’s exactly what mixr’s device priorities are for. Set your preferred devices in the Devices panel, and mixr will hold you on them. See: Why does my mic keep switching?

My audio switched to the wrong device

Check whether mixr is in Enforcing or Manual mode in the device summary. In Manual mode, mixr holds the device you picked. In Enforcing mode, it follows your priority list — so adjust the list if the ranking isn’t what you want. You can always Use now to force a specific device. See: Managing your devices

Auto-duck isn’t lowering my other audio

Auto-duck triggers when your microphone goes live (a call or recording). If it’s not happening, check that auto-duck is enabled in settings, and that the app you expect to be your “call” is actually using the mic. The app you’re calling on isn’t ducked — only your other audio is. See: Auto-duck

The permission prompt seemed to do nothing

Granting the audio permission can take a moment to register — mixr shows a brief “requesting access” state while macOS processes it. If you’d previously denied it, macOS won’t prompt again; grant it manually in System Settings → Privacy & Security → Audio, then relaunch mixr.

An app’s volume didn’t stick

mixr remembers per-app volumes. If a level didn’t persist, make sure you set it on the app itself (not a temporary state) — pinned and adjusted apps are remembered across launches.

Still stuck?

If none of this fixes it — or mixr is showing something that doesn’t match reality — reach out. Describe what you’re seeing and what your setup is, and we’ll help. Accurate bug reports make mixr better for everyone.

mixr is designed to never lie to you about your audio. If it does, that’s a bug we want to fix — please tell us.