What will this article teach you?

You will learn how to connect your iPhone or iPad to your macOS device in order to analyze audio loudness from your iOS device.

What devices can you use?

This technique should work with iPhone, or iPad and any macOS device like Macbook Air, Macbook Pro, iMac, Mac mini, Mac Pro…

Can you analyze YouTube live streams?

Yes, you can! In fact, you can analyze audio from any app on your iPhone/iPad. For example, you can open Spotify, and analyze audio from it too.

How to set up the devices?

Here is the 6-step process on how to set up the devices:

1. Connect devices via USB cable

iPad and Macbook Air USB connection

2. Open Launchpad and search for the Audio MIDI Setup app.

Audio MIDI Setup

3. Open the Audio MIDI Setup app and enable iPhone/iPad. (You will need to do this step every time you connect your iOS device and you need to do that before you open the Youlean Loudness Meter 2 app)

Enable iPad as input device

4. Open the Youlean Loudness Meter 2 app and then open the app preferences

Open Youlean Loudness Meter 2 app preferences

5. Set iPhone/iPad as an input device

Set iPad as an input source inside Youlean Loudness Meter 2 Pro

6. Play audio on your iPhone/iPad and start analyzing

Analyze audio loudness from YouTube live stream

A couple of things you need to know

First, you don’t need to adjust the volume on your iOS device which is awesome.

A downside to this method is that you won’t be able to listen to audio that is playing on your iOS device. I plan to add an option to monitor audio from the desktop Youlean Loudness Meter 2 app. Should I do that? Share your thoughts in the comments below!

Enjoy metering!

Grab the FREE version of Youlean Loudness Meter and achieve the correct loudness levels of your audio


  1. Cool. I’ve never had the need for this feature but I guess it’s cool that it can be done. Let’s see if moving forward having this ability will change that need. Thanks for sharing and thanks for creating the best loudness meter.

    • Thank you so much!

  2. Hi – Running LoopBack by Rogue Amoeba will allow the user to monitor the iOS device output while metering in RT.

    I created a Virtual Device named “from iPhone.” Source designation is the connected iPhone. The key is to implement a Monitor module, or in this case assigning the MacBook Pro Speakers. The LoopBack Monitor meters confirm signal flow and output all while the standalone meter instance does it’s job.


    • Yep, it can be done like that, but it is too complicated IMO. I will improve that in the next update!

  3. As a long time Pro owner, having a monitor option from your iPad or iPhone would be awesome!

  4. Hi Julijan, can I analyze using only my macbook pro? or do I need to use iphone or other devices.

    I have the Youlean pro. Does the app come with the pro? or is it separate? I don’t
    know much about the app or how to use it
    Can you send more info?

    Thank you

    • You can analyze with MacBook pro only, but you would need to install some 3rd party audio routing driver like Loopback or Black Hole. Both free and PRO versions come with the standalone app.

  5. This is indeed very interesting! Thanks for sharing and thanks for making such a great meter, it was a huge improvement for my workflow!

    • Awesome to hear that!

  6. Ive tried this via OSX Yosemite and IOS 14 and it works! However without hearing the audio it really defeats the purpose – like if we mixed by looking as freq graphs and limiters and stuff, making decisions based on visual graphics alone. And that would not be a good practice. Audio MUST be heard! Please update this feature to have it play through the connected audio interface. In my setup its the UA Apollo. Thx a whole bunch!

    • Also it would be cool to have a separate IOS app to monitor iphone playback, or at least the microphone input for measurement purposes, such as calibrating speakers on the go. There are cool apps that kinda do that, but yours would be a beast of its own. A good example is Oxford Wave Research “SpectrumView” app.

    • The iOS app is coming very soon!

    • Yep, that feature is coming for sure!

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