SoundSource 6.1.5 Mac

Version 6.1.4 arrived on 2026-09-17 with two fixes for macOS 27: a crash tied to Bluetooth devices that ignore requested buffer sizes, and Bluetooth output performance issues. The update also brings the ARK plugin to version 13.5.4.

Per-app audio routing and AirPlay support before you commit

• Can I control audio per app? Yes — SoundSource routes volume and effects for individual applications, so a browser and a music player can sit at different levels.
• Does it handle AirPlay? AirPlay streaming is supported alongside wired and Bluetooth outputs.
• What about Headphone EQ? The built-in Headphone EQ effect can be applied to specific applications rather than the whole system.
• Can I save setups? Complete audio configurations can be saved and switched with a single click.

What the install expects

SoundSource runs as a 64-bit application on macOS 15 or newer, on both Apple Silicon and Intel Macs. The interface language is English. It places volume controls for audio devices a click away and keeps key Mac sound settings within reach.

What the version 6.1 fixes changed in everyday use

The Bluetooth fixes in 6.1.4 matter most to anyone who switches between wired and wireless audio throughout the day. Before the update, some Bluetooth devices on macOS 27 would trigger a crash when they rejected the buffer size the system requested — a problem that showed up most often with older headphones and off-brand adapters. The crash wasn't frequent enough to make the app unusable, but it was unpredictable. You'd be halfway through a call, unplug a USB headset, macOS would hand off to Bluetooth, and SoundSource would vanish from the menu bar.

The performance fix addressed a subtler issue: Bluetooth output that stuttered or lagged when multiple applications piped audio through SoundSource's routing engine. Podcast editors who monitor a DAW, a browser source, and a voice chat simultaneously were the most likely to notice. After 6.1.4, that routing settles faster when a Bluetooth device connects. The ARK plugin bump to 13.5.4 is under-the-hood work — no visible feature changes, but it keeps the audio capture layer compatible with macOS 27's updated audio stack.

Set it to launch at login so per-app volume sticks

SoundSource ships with sensible defaults, but a few adjustments make the first week smoother.

Open the preferences pane and check Launch at login. The app sits in the menu bar; if it isn't running, per-app volume settings vanish and system audio falls back to macOS defaults. That's the number-one reason new users think the app stopped working.

Next, click the menu bar icon and choose Output Groups. If you use external speakers alongside a display with built-in audio, create a group that sends to both. You can drag volume sliders independently for each output device inside the group, which solves the problem of a monitor speaker that's always too loud relative to the desk speakers.

In the Advanced preferences, enable "Show all input devices." macOS hides several virtual devices by default — including some that capture app audio for streaming — and SoundSource respects that hiding unless you override it. For podcasters who need to route a guest's remote audio into a recorder, this is the difference between seeing the capture device and spending an afternoon in Audio MIDI Setup.

Finally, open any application's audio block in the main window and set its headphone EQ profile once. The built-in profiles are named after common headphone models, but they're also usable as broad correction curves: the "flat" profile cleans up muddy Bluetooth codecs surprisingly well, even on earbuds that aren't listed.

Podcast and livestream creators juggling multiple audio outputs

SoundSource fits a narrow audience exceptionally well: people who manage more than one audio destination from the same Mac. The clearest beneficiaries are podcast and livestream creators. A typical setup sends a DAW to wired monitors, a browser to a headphone mix, and a voice-call app to Bluetooth earbuds — all at once, with independent volume and effects. macOS alone cannot do that without creating aggregate devices and manually routing in Audio MIDI Setup. SoundSource collapses that configuration into a few clicks from the menu bar.

A second group is home-office workers who move between a desk and other rooms. Switching the system output from a Thunderbolt dock to AirPlay speakers in the kitchen takes two clicks. Per-app settings follow the switch, so the music app doesn't suddenly blast through a HomePod at the volume that was set for near-field monitors.

A third, smaller group is anyone who runs audio calibration software or measurement microphones. The ability to see every input device — including ones macOS hides — and apply a flat EQ to the measurement chain before the signal reaches analysis software saves time. It also means you can leave the measurement mic set as the input device without worrying that a system alert sound will feed into a live trace.

The separate app and system volume sliders that feel broken

The most common mistake is forgetting that SoundSource controls application volume separately from system volume. A user who drags the system slider down and still hears audio from Safari will assume the app is broken. The fix is to open the menu bar panel, find the Safari block, and check its level. Per-app blocks appear automatically for any application playing audio, but they don't reset when the system volume changes.

Another frequent error involves Output Groups. Users create a group for, say, headphones and a Bluetooth speaker, but leave both set to the same system volume. Bluetooth speakers often have their own hardware volume control, which means the group sends a line-level signal that the speaker then amplifies — resulting in distortion. The correct approach is to lower the Bluetooth device's volume inside the group and let the speaker's physical controls handle the rest.

Beginners also miss that SoundSource's EQ and effects apply per application, not per output device. A common scenario: someone sets a bass boost on a music player, then hears the same boost on a podcast app because both were playing through the same output. The EQ block lives inside the application's tile, not on the output device. Each app gets its own processing chain, and that includes the Headphone EQ effect.

Finally, users who download SoundSource and install it without reading the Gatekeeper prompts often hit the quarantine block. The disk image includes a script called "Open Gatekeeper friendly" that clears the quarantine flag. Running it and pressing Enter in the Terminal window that appears is the expected installation path. Skipping that step leaves the app flagged by macOS, and it won't launch until the flag is removed manually.

SoundSource 6.1.5 rolls out with a standard maintenance update addressing bugs and improving overall reliability.

• macOS 15 or later
• Apple Silicon or Intel 64-bit Mac