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Problem using USB to DAC in Integer Mode
johnkaess:
I'm running JRiver Media Center 27.0.15 and I have a Schiit Bifrost DAC connected via USB directly to my iMac (27" 2020 version). I am getting no output from my DAC right now, though the spectrum volume displays are bouncing away in the top left and right of JRiver. If I select Core Audio from Device Select under Audio, I get playback through my iMac speakers. If I select my Bifrost DAC the spectrum display shows activity, but I get no sound. If I go into Device setting and uncheck Integer Mode, I get playback through the Bifrost DAC.
Here's the issue: I've been using this DAC for about 3 years with Integer Mode selected and no problems at all. Now it only plays if I uncheck Integer Mode. My first thought was that maybe my USB cable was bad, so I replaced it. No change.
What has changed: I replaced my 2014 iMac with a new 2020 iMac (with the T2 chip).
I'm wondering if the new iMac is the problem, or did my DAC go bad? Also, what impact does disabling Integer Mode have on the sound quality. My goal is to get bit perfect playback. I have mostly 44.1/16 files ripped in Apple Lossless, but I also have 96/24 Apple Lossless and FLAC files. The file type or depth or sample rate do not seem to make a difference to this playback problem.
I'm guess I'm in over my head on troubleshooting this issue. I'd sure appreciate any advice of things to check, settings to change, and some wild guesses on what might be causing my problem. I went back and reinstalled Media Center 26 and it acts identically as Media Center 27.
JimH:
Please update to 27.0.22 from the top of this board.
HansVanEijsden:
Hi @johnkaess, thank you for bringing this up. Since yesterday I have the same problem. Or, at least the same symptoms.
I'm using JRiver 27.0.22 on my iMac (27-inch, Late 2012) with the newest MacOS Catalina 10.15.7 (19H2), connected to the M2Tech HiFace Evo Two which is connected to the Audionet DNP.
Yesterday morning it worked perfectly with Integer Mode enabled. But in the afternoon I had no audio anymore. Spectrum displays are working and also the level indicators in the DSP plugins section. My interfaces also do change sample rates (depending on the file played) but the audio is silent.
As soon as I disable Integer Mode all works fine, just like it had before for several months.
Things I have changed between the morning (working) and the afternoon (not working anymore):
* I updated the Dirac Live VST plugin from 1.3.13 to 1.3.14 (downgrading and/or disabling didn't solve it)
* I upgraded another program on my Mac: Audio Hijack 3.7.2 to 3.7.3 with a newer installed ACE version 11.2.0
A reboot of my iMac didn't solve it. Playout through the internal iMac speakers still works though, with Integer Mode enabled.
My question to you, johnkaess: do you have Audio Hijack installed? And did you also update it, perhaps?
johnkaess:
Great Question! I have Airfoil (also from RogueAmoeba) installed which also updated the ACE to 11.2 in the past day. I am not running airfoil, but of course the ACE is always running. Perhaps we should both inform Rogue Amoeba about this and see if it is the problem.
BTW, I did not state, but I am also on Catalina 15.7
johnkaess:
BTW, updating to 27.0.22 made no difference. Same problem.
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