SeventySplit
Send your Mac's sound to several outputs at once.
SeventySplit sends your Mac's sound to several outputs at the same time, with one click: speakers AND headphones, TV AND soundbar. A volume slider per output, automatic drift compensation, and a Bluetooth headset that joins the group by itself the moment it connects. Free 7-day trial.
What macOS's native multi-output device can't do
A volume slider per output, something the native multi-output device never had
Automatic drift compensation: no drift between your devices over time
A headset or Bluetooth device that connects joins the group by itself
How to send sound to several outputs
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Check two or more outputs (speakers, headphones, TV...)
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One click: the sound plays on all of them at once
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Adjust each output's volume, or click again to go back
Buy a license
9.90 CHF, once, forever. Key sent by email.
Frequently asked questions
What's the difference with macOS's native multi-output device?
macOS's native setting (Audio MIDI Setup) does create an aggregate device, but you have to build it by hand, it exposes NO volume or mute control once active, and it never switches automatically when a headset connects or disconnects. SeventySplit does all of that in one click, with a slider per output and automatic Bluetooth switching.
Why did my volume dial stop working before?
That's the classic flaw of a hand-built multi-output device: the aggregate it creates has no volume control of its own, so the keyboard's volume keys have nothing left to adjust. SeventySplit drives the volume of EACH real output directly, with a dedicated slider per device in settings.
Is the sound out of sync between my two devices?
SeventySplit turns on automatic drift compensation on every output except the one acting as master clock (adjustable). Without it, two audio devices gradually drift apart and the delay becomes audible over time.
Does it work with Bluetooth?
Yes, and it's the app's strongest angle: when a headset or Bluetooth device connects while sharing is active, it joins the group by itself. If it disconnects, SeventySplit falls back to your previous output. No manual reconfiguring every time.
App Store or website, what's the difference?
It's the same app. On this website: a free 7-day trial, then a 9.90 CHF one-time license with automatic updates. On the App Store: direct purchase, updates through Apple. Pick whichever suits you.