This Volume App for Mac Lets You Do More With Your Earbuds and Speakers

SoundSource, my preferred volume control app on the Mac, just got a major upgrade. The developer, Rogue Amoeba, recently released SoundSource 6 for Mac, which adds support for AirPlay devices, per-app equalizers, output device groups, and much more. It's an incredibly polished app packed with features, but my favorite feature is its ability to turn any random group of earbuds and speakers into a multi-room audio setup.

Multi-room audio with SoundSource 6

Credit: Pranay Parab

You can use SoundSource 6 to create a group of audio output devices, including Bluetooth speakers, wired headphones, AirPods, AirPlay speakers, and literally any other audio device your Mac can connect to. Then, you can send audio from any app to all of these devices at the same time, making for the ideal multi-room audio setup. I've used this to play Apple Music songs simultaneously on my AirPods, Bluetooth speakers, my Mac's speaker, and my HomePod. It's a great way to get music playing throughout your whole house.

To get started, click SoundSource's menu bar icon to open the app, and click the drop-down menu next to any app's volume slider. You'll see a button called Create Output Group or Edit Output Groups. Click this button and select New Group. You can now add as many audio devices as you want to the group.

In theory, you could also use this to chain a bunch of Bluetooth speakers from different brands to enjoy a more immersive audio experience while watching a movie, but in practice, latency makes the experience less than ideal. Even a slight lag in one of the speakers can ruin an immersive audio experience, but that's not SoundSource's fault. It's a difficult job to get multiple speakers from different brands, which use different audio output standards, to work as a perfect surround sound setup. Given the barriers in place, SoundSource does an admirable job with its task.

I found that the multi-room audio feature works best when you're listening to music with one speaker in each room. That way, the slight latency won't bother you at all, and you can have music to keep you company as you run through household chores.

AirPlay support is great to have

Credit: Pranay Parab

As someone who's used SoundSource since 2017, I've always missed the ability to send audio to AirPlay devices. Until recently, Rogue Amoeba had left that feature to another of its apps—Airfoil. However, SoundSource's latest release adds support for AirPlay devices, which means that you can finally use it to send audio from any app on your Mac to a HomePod, Apple TV, or other AirPlay-enabled device.

I use SoundSource to redirect audio from certain apps to specific speakers, and with AirPlay support, I can send music straight to my HomePod, while restricting notification sounds from messaging apps to the Mac's built-in speakers.

Per-app EQ is a big deal

Credit: Pranay Parab

I first started using SoundSource for its ability to let you set a custom volume level for each app on your Mac. I used this to reduce the volume of notifications from Messages and Slack, while keeping sounds from other apps at a higher level. SoundSource 6 has added another layer to this feature by shipping a per-app equalizer, which lets you set a different sound profile for every single app you use. It ships with nearly two dozen EQ presets for you to choose from. You can choose one EQ preset for music streaming apps and a different one for the apps you use to watch movies. You can locate this feature by clicking the right-arrow button under the FX section in SoundSource.

Set a custom audio level for each device

Credit: Pranay Parab

SoundSource also lets you set a custom volume level for each audio device your Mac is connected to. This lets me reduce the volume on a particularly loud Bluetooth speaker I own, while keeping my Mac's speaker volume a little higher. The app also allows you to set a maximum volume limit for each audio device, which you should use for two reasons: To prevent hearing loss if you're using headphones, and to avoid damaging your speakers. I've accidentally damaged a speaker by keeping it at 100% volume for a few hours in an outdoor venue, which isn't what the speaker was designed for. Since then, I've shied away from running speakers at full volume, and you can use the maximum volume limit feature here to help with that.

To use this feature, open SoundSource and click the speaker icon in the top-right corner. This will show you all your input and output devices. Select any device and locate the Output tab in the right pane. Here, move the Max Volume slider to an acceptable limit.

More features

Credit: Pranay Parab

SoundSource 6 has many other new features that make it worth the upgrade. You can set a preferred device order to ensure that your Mac doesn't accidentally connect to the wrong audio devices. I use this to set my AirPods as my preferred speaker, followed by my HomePod, my Mac's own speakers, and my Bluetooth speaker comes in last. The app also allows you to add volume controls for individual apps to the menu bar, which means that you can control the audio level of Chrome, Music, Spotify, or any other app without opening the main SoundSource window. This is great for the times when you only want to adjust a single app's volume.

There's also a neat feature where SoundSource can set your AirPods to 'output-only' mode, which means that every app will use the Mac's built-in mic for input and send the audio to the AirPods. Rogue Amoeba says this improves audio quality on the AirPods significantly.

There are many such quality-of-life improvements in this app, which made it an easy decision for me to buy its sixth version. If you've never used SoundSource before, you'll have to pay $49 to use the app. There is a trial mode that lets you try the app for up to 20 minutes for free, after which it degrades the audio. Those upgrading from previous versions of SoundSource can get the updated app for $25.

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