Loopback and xdax on a Mac

Gordon, ve7on

After many years using Loopback on my Mac I upgraded to the latest version. Unfortunately that was a mistake. Wsjt hears fine but no transmit. I have been playing with it for the past week with no luck. I have been in contact with Rogue Amoeba and they don’t seem to be able to figure it out either.

Does anyone have any suggestions?

Thank you

Gordon, ve7on

Mike WA7IJV

I also encountered that issue, after updating to Loopback’s new ARK-based release. xDAX TX stopped working (while xDAX RX channels continued to function).

I eventually found a workaround: run xDAX inside Terminal

I’m on Sonoma - below System Preference commands reflect that OS version. Using Mac mini M2 for radio.


If you would like to give my workaround a try…

1) On the Dock, bring up the Microphone pane - ie., navigate to System Settings > Privacy & Security > Microphone

2) Note if Terminal is in the Microphone list (it might not be found at this point).

3) Launch a Terminal window (e.g., command-space Terminal, or via Finder window in Applications\Utilities).

4) If Terminal was not previously in the Microphone list, hopefully it will now be there.

5) Determine if the entry for Terminal is “on” (slider button is to the right). If it isn’t, turn it “on”.

All the above are one-time setup actions.


For routine use: launch a Terminal window and enter…

/Applications/xDAX.app/Contents/MacOS/xDAX


I employ Terminal's right-click "New Command...", which brings up a "recent commands" list. Makes it easy to launch xDAX under the above's "new way".


A security-related caveat…
… I suspect that granting Terminal microphone access allows anything run via Terminal to have access to the “microphone environment”.


73…

Mike WA7IJV

Gordon, ve7on

Many thanks Mike, I will give it a try.

73, Gordon, ve7on

kenb

i also have this problem after upgrading. from the xDAX log:

2024-09-11 05:19:02:969 [Info] > DaxPanelViewController, setDaxEnabled() - TX audio stream enabled
2024-09-11 05:19:03:015 [Warning] > xLib: Unknown Slice token: sample_rate = 24000

sample rates are set to 48000 according to the Midi app.

Mike, thanks for the workaround. i'll give it a try. has anyone reported this to rogue…

73, ken ns7v

Mike WA7IJV

I believe Gordon is in contact with the Loopback vendor.

I've seen that same diagnostic. As you note, it appears all pieces (digi app, virtual device port speed, etc.) are at the same 48k speed. I've also tried different speeds (which seem to work as well).


Perhaps this MacOS Console diagnostic may be relevant to the xDAX TX issue:

Refusing authorization request for service kTCCServiceMicrophone and subject Sub:{de.DL3LSM.xDAX}Resp:{TCCDProcess: identifier=de.DL3LSM.xDAX, pid=83050, auid=502, euid=502, binary_path=/Applications/xDAX.app/Contents/MacOS/xDAX} without NSMicrophoneUsageDescription key

Unlike other apps listed in my mac’s Microphone pane - FLdigi, WSJT-X, etc. - xDAX isn’t shown. So, we can’t “turn it on” in the MacOS-required manner.

BTW, I am seeing other potentially worrisome xDAX logging in the Console. Fingers crossed...

Mike

Gordon, ve7on

I have been in contact with Rogue Amoeba. Many emails and still no luck. The latest is that they are going to consult their engineering department. I have gone back to ver. 2.3.2 and it works fine. There is something wrong with the new update.

Gordon, ve7on