Holo Audio May DAC

• Only accepted within 48 hours after purchase, refunds/cancellations may be made."

I'm hoping some of the MAY DAC owners here can help troubleshoot an issue I'm having with my recently acquired May (L2).

The unit has about 200 hours on it as I've been burning it in using my iMac via USB. About once every 15-20 minutes I get this digital "screeching" noise for about 1 to 2 seconds in duration. It sounds like when one of the Agents in the first Matrix movie inhabits and takes over another body. Zzzzhhhwweeee.

I've tried different output settings on the mac using Audio Midi Setup (44.1khz through 153.6 khz is available). I assume 44.1 is what I should be using since all imac files were ripped from CDs. Bit depth however is forced by the May at 32-bit. I would assume 16-bit should be an option and more in line with my file types, but it is not an option.

I have not noticed the noise when playing CD's and using the coax input on the May.

Any ideas?

Thanks to you both for your replies.

@redlenses03 , your link to head-fi was helpful. It appears Macs and May dacs have had incompatibility issues. I wish i knew that before purchase.

Kitsune or should i say Magna hifi appear to be rolling out firmware updates for screeching sounds on Windows machines, but it doesn't really help the mac users since device drivers aren't required in the first place. If a firmware update to the May was availble, I'd certainly give it a try.

I have a support ticket into Kitsune, but wonder if I'm going have to unload this unit or try some usb to coax or optical converter,, which will defeat the purpose of having the "upgraded" Titanis USB on the level 2. 

If i can find a solution, Ill report back for any other mac users out there.

I mean that when in the iMac's Midi Audio setup panel, the Holo May is seen by the mac, and the format can be changed (44.1 khz, etc.) But the integer is not selectable and set at 2-channel 32-bit integer. It appears the 32-bit integer is being set by the May.

The clock source for the macs built in output is set to "default".

The clock source for the May is set to "device" and cannot be changed, which leads me to believe the May is telling the Mac it's handling clock duties.

Interesting development in my screeching noise issue. I reset the Midi Audio set up to 44.1khz and unplugged the USB cable at the mac end for a minute. I plugged it back in and I haven't heard the screeching noise since.

I just using iTunes for the USB input on the May, which is just my convenience source. Meaning, for music around the house while not critically listening. My main use will be coax through my SACD/CD player. But, I'm using the iMac to burn in the May so my CD drive isn't spinning discs for a month.

@redlenses03 , I appreciate all your help.

Mine was expected in 5-6 weeks and it actually arrived a few days early. Can't say of that will be the same for you.