Mac OS Utilities
Quick and complete control over all your audio devices used in homes and studios around the world. "Ranked in 20 App Stores around the world!" - AppFigures.com
N.B AudioSwitcher and / or macOS can not change 'HDMI volume' there is no volume information carried in an HDMI signal at all. There appear to be some reviews floating around suggesting AudioSwitcher can do this - it can't - see the FAQ below for the reasons / alternatives solutions
* Please, save yourself a potential headache (and a dollar) and read the FAQs before you buy to make sure AudioSwitcher does what you want it to: http://goo.gl/m3pu7L
If you've got a problem or a suggestion please contact me at firstname.lastname@example.org and I'll do my best to help. I get back to 70% of people within TWO hours and 95% people within 24. I've no way of contacting you via the App Store if you just leave a review - many if not all of AudioSwitcher's features are direct responses to individual requests.
"There’s no easier or faster way to send the Mac’s audio output to Apple TV and AirPlay..." - Mac360 Review
AudioSwitcher is a menu bar that allows you to switch quickly between all available input and output devices. In addition you can change the volume of any device without having to change your current input / output.
You can quickly change the sample rate or output to multiple devices at the same time.
Using the preferences screen you can choose to ignore certain devices, set a default start-up input or output device as well as it’s volume.
AudioSwitcher supports any device available to the system: AirPlay, USB, HDMI, Thunderbolt, Bluetooth etc.
AudioSwitcher is ideal if you have multiple sound devices attached to your Mac and want to be able to switch between them without having to use System Preferences.
It’s great for a home theatre set-up allowing selection of default devices (and their volumes) on start-up as well as allowing you to quickly route output to AirPlay devices in one click.
-- Various Bug Fixes before complete re-write in Swift for 3.0