Sorry I missed the request for my Mac OS but the problem has been fixed with the current release 2020.3. Kudos and many thanks for the speedy resolution.
Other than using the MBox Pro 3 with Logic Pro X, I also use it with Tidal, Audirvana, Elmedia Player and a bunch of other audio/video apps. Select the MBox as the output device and it works as expected. I'm still using Mojave (ironically because the MBox driver is 32 bit) but other than that...
Thanks for the reply. I tried the suggestion but ended with the same results, I had previously. It's like iRp is ignoring the preference settings and the the Volume pop-up menu. I just made the purchase this evening so, tomorrow I'll see what adverse effects I'll have routing the Mac's audio...
New to iReal Pro. The problem I'm having is, iReal Pro won't play through my MBox Pro 3 audio interface, even though it's selected in the audio selector near the volume control and also in preferences. I can get iReal to play through the MBox if I select it in the Mac OS Sound preferences but...