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No Signal from Zoom Livetrak USB Audio Interface with Ableton on MacOS

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No Signal from Zoom Livetrak USB Audio Interface with Ableton on MacOS

PostPosted: Thu Jul 02, 2020 12:41 pm
by 1984drum
I get no input signal in Ableton from any of the tracks that are routed from my Zoom Livetrak L-20.

Has anyone who has successfully achieved this? If so, would you mind posting your setup tips as I have been struggling on this for several hours!

Other audio interfaces work fine for me in Ableton, but I do want to switch to the LiveTrak L-20 as it should provide me with more input tracks and other useful options for my audio production workflow.

Here's my setup and what I have tried so far:

- Using Ableton Live 10 Suite on MacOS Catalina 10.15.4.
- Hardware: Zoom Livetrak L-20 with the most recent firmware from Zoom (v1.14).
- Only one other USB device (a mouse) is attached to the iMac.
- Re-booted and reinstalled the Zoom L-20 drivers as per the manual.
- Tried both with and without the latest Zoom drivers, in and out of USB Class Compliant Mode. I always have the Audio Interface option switched on the back of the Zoom Livetrak.
- Tried all tracks and also just two tracks, with clear level signals lighting up on the Livetrak.
- The USB output works on the USB audio return tracks, and always has.
- In Ableton, all the correct inputs show up in the Audio configuration preferences when the Zoom Livetrak is turned on.
- I have never managed to see any signal coming in from the Zoom Livetrak through the correctly selected audio Ext. In inputs in Ableton.
- I can both see and hear the output of the tracks I want to record, but only out of the Livetrak hardware, not in Ableton.

Please help if you know what the solution is. I am currently suspecting it to be a MacOS / Zoom Driver issue. Perhaps it is an issue in Ableton.

Thanks in advance!

Re: No Signal from Zoom Livetrak USB Audio Interface with Ableton on MacOS

PostPosted: Thu Jul 02, 2020 2:18 pm
by cyrano.mac
Just a couple of thoughts...

Have you tried any other audio program (Audacity?) to see if you get input there?

Are you aware you need to give Ableton access to the mic (audio input) in System preferences/Security & privacy?

Re: No Signal from Zoom Livetrak USB Audio Interface with Ableton on MacOS

PostPosted: Thu Jul 02, 2020 2:21 pm
by Sam Inglis
Is your Ableton project set to the same sample rate as the hardware? The Zoom is unusual in that sample rate is set using a physical switch on the rear.

Re: No Signal from Zoom Livetrak USB Audio Interface with Ableton on MacOS

PostPosted: Thu Jul 02, 2020 4:14 pm
by 1984drum
Thanks for your responses, I finally got to the bottom of this. Here's the solution:

Nothing to do with LiveTrak or Ableton. It was a Privacy setting issue that affects MacOS Mojave and MacOS Catalina users. The solution is simple and safe but does require a restart of the Mac. Basically all that was required was a reset of the Parameter RAM or PRAM. By doing this, you reset the access granting modal window that pops up when you initially install apps. So now, when you open up any existing applications that require access to the Microphone, (which, on a Mac also means all methods of inputting sound via USB Audio Interfaces), you will get the OK or Deny Access option. This then adds the application (in my case, Ableton Live 10) to the allowed apps list in the System Preferences > Security & Privacy > Privacy > Microphone tab.

Here’s how to reset your PRAM in order to re-enable the microphone (audio input) use in the app that was causing a problem:

1) Shut down your machine. Yes, all the way down, not sleep or logging out.
2) Press the power button and then press command-option-p-r. You have to make sure you get those keys pressed before the gray screen comes up or it won’t work.
3) Hold those keys down until your Mac reboots again and you hear the startup chime.
4) Let go of the keys and let your Mac reboot normally.
5) Open the existing app that did not seem to allow any audio input.
6) Click Allow when the pop-up shows to allow microphone access.
7) FINALLY! Record audio in your chosen app.

Hopefully that is helpful for others! :thumbup: