Under The Microscope

Archive for May, 2020

Get Airfoil for Mac 5.9, the Latest Version of Our Audio Streamer

Continuing our parade of free product updates, we’ve just released Airfoil 5.9. It’s the latest version of our audio streaming tool, perfect for playing audio through wireless devices all around your house.

For over 15 years now, Airfoil has made it possible to stream any audio from your Mac to devices around your network. Today’s update brings refinements and improvements throughout the application. Read more below, or just visit Airfoil’s product page to download the latest.

Equalizer Refinements

Airfoil’s built-in 10-Band Lagutin Equalizer has been substantially improved. It now offers a handy new sparkline indicator in the Presets menu, which provides a quick idea of how each preset works. The saving and editing of user-created Presets has also been overhauled and improved. To top it off, transitions between presets now animate beautifully as well.

A New “Alerts” Window

Whether it’s an incorrectly entered password or a problem with a remote speaker, errors are bound to happen sooner or later. When they do, Airfoil will now show them all in a centralized location, its new “Alerts” window.

After first adding the Alerts window to Farrago 1.5, we’ve now refined it further in Airfoil. Over time, it’s likely to show up in all our products, as a useful way of letting users know of any issues that appear.

Track Title Improvements

When Airfoil transmits audio from supported applications, it also passes along metadata about that audio, like artist name, track title, and album artwork. Today’s update adds support for track titles from the MiX16 apps, and restores track title support to Audirvana. It also improves the performance of track title retrieval from several apps including Spotify, Music.app, and VLC.

And More

As always, there are many smaller fixes and improvements as well. Airfoil’s audio capture, powered by the Audio Capture Engine (ACE), has been updated. It will now properly grab audio from Google Chrome’s Progressive Web Apps, and several smaller bug fixes and refinements have been made. In addition, Airfoil now correctly streams only the remote half of a VoIP conversation, perfect for listen-only call. Alongside that, we’ve made small enhancements for VoiceOver users, and fixed up a number of rare bugs.

Download Airfoil for Mac 5.9 Now

If you’re new to Airfoil, use the links below to learn more, and download the free trial. In no time at all, you’ll be streaming audio all around your house.

For our existing customers, Airfoil 5.9 is another free update. Existing Airfoil users should select “Check for Update” from the Airfoil menu to get the latest.

Helpful Airfoil Links

Enhance Zoom Calls (And Other Voice Chats) With SoundSource

In recent months, millions of Mac users have begun making audio and video calls with Zoom, Webex, and many other VoIP apps. As a result, those same users have also found themselves annoyed by the often sub-par quality of audio heard through these services. Fortunately, our product SoundSource can help make things sound a little sweeter.

With SoundSource’s ability to apply effects to any audio, it can enhance what you hear on calls. As folks have figured this out, we’ve seen a number of tweets like this:

Finally discovered SoundSource from @RogueAmoeba, and the ability to stack AUs on top of the Zoom audio output - parametric EQs, Dynamic compression, etc - is a revelation.

With just a minute or two of configuration, SoundSource can make your calls sound better. We’ve posted a new support article with full instructions for improving audio on voice calls. Give it a read, then test things out yourself with SoundSource.

Bonus content: If you want to spice up your calls with music, sound effects, or other audio, our previous post on using Loopback to add audio to voice chats has you covered.

Resonate SDK: Realtime MacOS Audio Development, Simplified

Today, we’re pleased to be unveiling Resonate, a new audio SDK available for licensing by MacOS software developers.

The Resonate SDK simplifies audio processing on the Mac to an almost unimaginable level. We took our years of experience creating audio software, and crafted a dramatically easier-to-use interface for MacOS’s CoreAudio. With Resonate, you no longer need to be a professional Core Audio developer to access audio functionality in your Mac application. Resonate will help you build your own product faster, while delivering superior latency, reliability, and ease of development.


For nearly two decades, our Audio Capture Engine (ACE) technology has powered Audio Hijack, Loopback, and many of our other products. In early 2018, we began commercial licensing of ACE, to provide other software makers with the ability to capture audio within their own products.

ACE is now in use by companies both big and small, providing audio to screen recorders, streaming apps, and more. It’s been very satisfying to partner with other companies and provide audio capture to so many tools on the Mac. With Resonate, we’re looking to do it again.

Resonate Is Audio Processing, Simplified

Resonate originated as a companion to ACE. ACE provides captured audio via virtual devices, which allows programmers with existing Core Audio pipelines to quickly get up and running. However, after talking to many companies new to MacOS, it was clear we’d overlooked something. Although we are experienced with the intricacies and eccentricities of CoreAudio, most others are not.

Resonate levels the playing field. If you’re developing an application which needs to use audio on the Mac, Resonate will speed up your development time, and save you countless headaches. Visit the Resonate licensing page, then get in touch for more details.

Plenty of Updates for Users as Well

The technology we’re licensing is the result of work on our consumer-facing products. Licensing this technology to others enables us to earn additional revenue from that work, but our primary focus remains on the continued development of our own direct-to-consumer audio tools.

This year alone, we’ve already shipped a dozen maintenance releases, as well as four major updates (if you’re scoring at home, those would be Farrago 1.5, Audio Hijack 3.7, SoundSource 4.2, and Airfoil Satellite for Android 3.0). We’re not slowing down, either, with work in progress on major updates to Airfoil, Audio Hijack, and more. Stay tuned!

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