Huy Hong

Try running this command after every reboot: sudo kextload -b 'com.async.driver.async192 Some are having issues with the drivers not loading after reboots.

Are you using the W4S drivers or the Northstar ones? Your original comment about the "async_155r5" suggests the latter. Try the W4S drivers, those don't emit any crackling/static for me.

Hey Dan, You have an old driver installed still that's conficting with the newer ones. Try running: kextfind -b "com.veldom.driver.EM_Usb" to find the old .kext file. Run open /System/Library/Extensions and find that .kext file and delete it. Then sudo kextunload -b 'com.veldom.driver.EM_Usb' should remove that driver completely. Then follow the rest of the instructions. Huy

As for Amarra, don't use it unfortunately so can't help on that front either. Sorry.

For anyone looking for hiFace Two support, the W4S drivers won't do you any good. Those drivers only apply for specific vendorId and productId and it's unlikely the hiFace Two uses the same value as the hiFace One. Installing the W4S drivers, with or without my mods, won't do anything. You'll have to look for M2Tech for help. For those not seeing the hiFace One on boot, you may have to run "sudo kextload -b 'com.async.driver.async192'" in terminal after boot. Device will pop back up in Sound Preferences right after. Happens to me when I reboot (which is almost never), currently slammed with other work so can't troubleshoot.

Btw, I was already referencing this driver release when I put up the instructions on how to install. If you followed those instructions, including the download link, you should have the latest.

The "kextunload" and "kextload" commands just tell OSX to re-initialize the drivers, which normally happens during boot. Something is likely interfering, possibly permission issues or no device being found upon boot or random other issues that'd be a lot of work to troubleshoot. I'd try clearing your kext caches: sudo kextcache -system-prelinked-kernel sudo kextcache -system-caches If that doesn't work, you can also try adding a launch daemon (see osx - How can I force a Mac OS X kext to load prior to login? - Super User), replacing "async192.kext" where appropriate. This will tell OSX to load the kext after boot.

Thanks for finding these. Updated installation instructions using the W4S DAC-2 based drivers here, includes commands to remove the older Northstar r5 drivers: https://gist.github.com/huyhong/8323746 I suspect both the Northstar and W4S drivers are from the same developer, with the W4S being a slightly newer build (Northstar: v1.0.55 vs W4S: v1.0.59) Otherwise only difference in the kexts is the "BlockSize" key being increased from 512 to 4096. Not getting static or pops at all from Audirvana or Spotify in 15 minutes of use, will continue to observe through the night. Direct Mode and Integer Mode still seem to be intact. Lemme know if I can be of any additional assistance .

Got a reply from M2Tech yesterday: Dear Huy, thank you for your e-mail. We actually know about using Northstar and Chord drivers to use our products. The fact is that a company cannot suggest using other companies part or apps to run her own products. Anyway, our new driver is almost ready, we hope to release a beta in 2 weeks. Best regards, Marco Manunta So ~2 weeks for beta drivers.

I emailed M2Tech just now to let them know about this thread (unsure if they do) and as a heads up that there is a workaround for the Hiface that mostly works (outside of the intermittent popping/crackling) to see if they can license these drivers from Northstar and get the Hiface 1 officially added. Will let you guys know if anything results from this.

So I've worked out about 6 installs now via email, and more often then not, people have residual drivers from previous installs. Turns out the productId and vendorId is the same for pretty much everyone, so either old drivers are interfering, or you're not running all the commands properly. I'm tempted to re-package the Northstar drivers with the mod, along with commands to remove every variation of older Hiface drivers, so it's easy to install just like any driver would be installed, but that's probably not cool with Northstar, also M2Tech should be doing this, not me .

I found out what RichardHolbrook was stuck on; he had a "W4S192.kext" installed, which was inteferring with the modified Northstar drivers and preventing his Hiface 1 from loading. I suspect the rest of you that are running into issues have older Hiface drivers still installed under different filenames from the default "Hiface.kext", thus preventing the Northstar drivers from loading.

Also load up /Applications/Utilities/Console, run "sudo kextload -b 'com.async.driver.async192'" in Terminal, and check if the log returns the following 3 lines. Paste that to me too.

Naggots & RichardHolbrook: can you both load up USB Prober again, choose the "Bus Probe" tab, click on the "Save Output" button, and email me the resulting .txt file? Email is [myname]@gmail.com

This is getting sadder by the day For those who haven't gotten my hacky fix to work, throw me some data about your devices: 1. Download "USB Probe" for 10.7+ – http://touch-base.com/downloads/MacProber/USB_Prober_Mac_OS_X_10.7.3.zip (more info here if you're concerned about what you're downloading) 2. Run it 3. Click on the panels on this screenshot: 4. Write down exactly what device you have and the 3 values (or if you can make sense of it, just replace the vendorId and productId in the respective places for the Young DAC) Let me know, Huy