Amped Up

We played with the amplifier card for a bit, and while it does deliver excellent audio quality, we’re not ready to take our A/V receiver out of our entertainment center. For starters, the amp doesn’t accommodate rear surround speakers (it’s limited to left and right surrounds). And as terrific as it sounds, even a home-theater PC isn’t set up to handle all our audio sources (although the motherboard does have a pair of RCA jacks for analog line-level input. Plug in a stereo source—such as a VCR—and you can route the audio to the amplifier.)

But we also use a satellite receiver/DVR to watch and record television, and there’s no way to pipe surround sound from the satellite tuner to the PC. And while we could use the HTPC to stream music from our Windows Home Server machine, we still prefer the Sonos Multi-room Audio System for music listening. Besides, the pre-amp delivers a higher signal-to-noise ratio, and it sounds fabulous.

The reference design supports AMD’s OCUR TV tuner for use with the digital cable set-top boxes, but you can still only buy such a card as part of an OEM system build. Our reference design came with AMD’s ATI Theater Pro tuner card, but the value of over-the-air tuners such as this is severely by the fact that they can’t access premium cable and satellite channels (HBO, Showtime, et al).

On the Case

AMD chose nMedia’s HTPC 1000B enclosure for its reference platform, the look of which fit right in with the other components in our entertainment system. The aluminum case has a single 5.25-inch drive bay for an optical drive and four internal 3.5-inch drive bays. The front panel has a cut-out for an LCD (the reference design had one, but the display is not included in the price of the case), and there’s a flip-down panel that hides one eSATA, one FireWire, and three USB ports; a media card reader; and 1/8-inch jacks for a mic and headphones.

We added Microsoft’s Wireless Entertainment Desktop 8000, but we swapped out the useless (in a living-room environment, at least) mouse for a Gyration Air Music Remote (which you can now find for a pretty reasonable street price of $85). We connected the PC to both an Epson Cinema 500 video projector and a ViewSonic N4285P 42-inch LCD television.

Trouble in Paradise?

Everything went smoothly until we connected the Maui system to a Sherwood RD-7503 A/V receiver: The computer would not send the receiver a video signal over HDMI with resolution any higher than 640x480 (480p). Curious to see whether the problem was with the computer or the receiver, we then connected the HDMI from HP’s Pavilion HDX 9000 notebook PC, which is equipped with AMD’s Radeon HD 2600 XT videocard: We ran into the very same problem.

We then tried a second desktop PC, which was outfitted with an Nvidia GeForce 9800 GT (with a DVI-to-HDMI adapter). This time, the Sherwood receiver performed as expected. We also didn’t encounter any problems with the HDMI outputs from an upscaling DVD player and a Samsung Blu-ray disc player.

The last we’d heard from AMD, they thought the problem to be related to the computer not reading the receiver’s EDID profile correctly, although they told us they’d never encountered a problem with other A/V receivers they’ve tested.. Sherwood told us they’d seen a similar problem with a Motorola DCH3200 digital cable set-top box, but that they weren’t familiar with AMD’s Maui platform and had no further comment on the matter.

Final Thoughts

AMD’s engineers deserve a big round of applause for giving so much thought and consideration to audio while designing the AMD Live Home Cinema reference platform; sound is all too often overlooked in PC designs, and Maui’s D2Audio components are divine.

We know AMD is working hard to convince Hollywood and software developers that it provides the protected audio path that software Blu-ray players need to avoid down-sampling Dolby TrueHD and DTS-HD Master Audio soundtracks. Should they succeed, however, stand-alone Blu-ray players will still have one advantage over the PC: They can send both HD video and HD audio to an A/V receiver using a single HDMI cable: Maui will always need at least an HDMI cable for video and as many as eight RCA cables for audio.

Aside from those limitations, Maui is a splendid destination.