When we first heard about the Kanex HDMI + digital audio converter a few weeks ago, I was eager to give it a trial run and see if it managed to deliver on the promise of integrated audio with HDMI video. I've been playing with the $70 unit for a few days now, and the answer is a qualified yes: it does the job, but depending on your home theater setup you may be able to get by with a less expensive option.

The digital-audio Kanex unit ships without a manual and is largely self-explanatory (although the company has now posted a basic user guide and FAQ) -- a female HDMI port on one side of the roughly iPod-sized unit, and three male cables coming out the other side. The cables connect to the mini DisplayPort, optical audio out, and USB port of your Mac; while Kanex does sell a $60 unit that handles audio over USB, this version only uses that connection to power the adapter and does not provide a USB audio interface. If you're running short of open powered USB ports you might opt to plug it into a USB power adapter instead.

In operation, there's not much to worry about: I plugged in all three ports to a unibody MacBook Pro and connected an HDMI display, then went to the normal Mac OS X Displays preference pane, where I found a full assortment of resolutions for my enjoyment. The top few 'television' options may vary with your connected gear; on my test set (a Vizio 42" 720p display) I was able to choose 720p and, oddly enough, 1080i and 1080p. Below that you have resolutions ranging from 640x480 up into the 1600x1000 range.

When we published our "Ultimate Mac mini Home Theater" guide in August, I drooled along with everyone else at the idea of supercharging my HDTV with a mini for movie and music playback. Something nagged at me, though, as I looked over the options for going from the mini's video-out ports (the current model sports both DVI and Display Port) to the HDMI standard connector that most TVs expect nowadays... how to get that digital audio signal onto the HDMI link, and avoid a second set of cables to handle sound? It seemed less than graceful.

If you want to skip over a clunky external converter box like this one, current minis and other Macs featuring the Mini Display Port connector now have a new option for HDMI; Kanex's two audio-included connectors can put the sound onto the HDMI link where it belongs.

Kanex is selling two models of the connector (both are on extremely limited availability right now, the company says). The $60 Digital Audio version includes a TOSLINK optical connector for premium quality sound, and the USB Audio version delivers analog audio for $50 [as of 10/20, the price has gone up on this unit to $60 as well]. Both let you put all your eggs in the HDMI basket and clear your cable clutter, while simplifying your TV remote input dance as you try to get the audio and video sorted.

We're hoping to get our hands on one of these units soon and we'll let you know how it performs.

Thanks to Michael W. for the tip.

It seems like just yesterday we heard from David Thomas that his Samsung Syncmaster 910 MP display wasn't working with his shiny new 2009 Mac mini. Oh, wait, it was yesterday -- and David's not alone, judging by the traffic on Apple's support boards. VGA display owners who are using a Mini DisplayPort-VGA adapter should be aware that older displays seem to be having some trouble with the newfangled setup; in fact, Apple's troubleshooting steps for lack of video on the mini suggest replacing your display if it's not lighting up with the mini, even though it may still work with other machines. If your existing display is a Samsung or is more than four years old, you may want to cross-check with Apple before trying to use it with a new mini.

There's some light at the end of the tunnel, however. While it hasn't appeared on Apple's download page for the mini yet, reader Nikolay sent in word that the Mini DisplayPort to VGA Firmware Update is showing up for him in Software Update on his MacBook Pro. Since one of the listed fixes is "no video on some external displays," if you've got the VGA adapter in use and are having video troubles you may want to borrow a monitor long enough to run the update and see if that clears the issue for you.

Thanks David & Nikolay

Yesterday, our buddy David Chartier at Ars and Sam Oliver at AppleInsider both publicized an issue that's been burning up the support boards for a while now: iTunes video rentals and purchases in HD are flagged for HDCP control, and in cooperation with the new Mini DisplayPort connector on the MacBook and MacBook Pro unibody models, those movies and TV shows are refusing to play back on non-compliant external displays.

In this case, 'compliant' means HDMI or recent-vintage DVI, but even monitors or TVs that support HDCP may not properly negotiate with the DisplayPort connector to give iTunes and QuickTime the all-clear signal (if so, quitting and relaunching iTunes once the display is hooked up may clear the playback hold). Equally annoying: HDCP is only supposed to apply to 'high-value' digital streams, meaning standard-def purchases and rentals on the iTunes store should be out of scope... but some reports indicate that both the HD and SD instances are flagged, blocking playback on anything but the laptop's internal display or a straight-thru HDMI connection. Argh!

While Apple TV users with unconventional output setups have been dealing with this aggravation since the beginning of the year, MacBook and MBP owners have largely steered clear, even as the HD content on iTunes became available for playback on the laptops. Now that the hardware and software have come into sync on the unibody models, Apple's compliance with HDCP -- a necessary but appalling condition of the content companies that deliver the HD movies and TV shows -- is beginning to close out the 'analog hole' and cause real aggravation for laptop owners with legitimate use cases. Talk about a bag of hurt.