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Xonar EMI shield concept

Xonar D2K at CeBIT, image courtesy of VR-Zone
ASUS readies its upcoming Xonar D2 and Xonar D2K PCI and PCIe x1 sound cards

ASUS last week at CeBIT demonstrated its upcoming Xonar-series sound cards. The upcoming Xonar-series spawns two variants, the D2 and D2K in PCI and PCIe x1 interfaces. Dolby Digital Live and DTS Connect multi-channel audio encoding technologies are available for digital multi-channel audio. The Xonar-series also features 7.1-channel analog outputs for those that prefer analog to digital.

Early reports claim the ASUS Xonar-series feature an Analog Devices audio DSP, however, ADI denies any involvement in the sound card.

“I checked with our sales team and there is not an ADI part in this unit,” said Sandra Perry, product line manager, SoundMAX, DSP Division.

ASUS also touts Dolby Pro Logic IIx, Dolby Virtual Speaker and Dolby Virtual Headphone technologies for multi-channel upconverting and surround sound with stereo speakers and headphones. ASUS rates the Xonar-series with an 118dB playback and 115dB recording signal-to-noise ratios. The upcoming Xonar-series sound cards support 24-bit/192 KHz playback and recording resolutions and ASIO 2.0 as well.

ASUS internal testing reveals the Xonar-series is capable of low total harmonic distortion rates. The Xonar-series has 0.000006% THD on all eight analog outputs and the single line input, between the frequencies of 20Hz to 20 kHz. ASUS also equips the Xonar-series with an EMI shield and touts it provides “stable audio quality.”



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RE: Wow
By rcc on 3/23/2007 5:40:18 PM , Rating: 2
quote:
Digital is kinda a 'it works or it doesn't' thing.


That's an extremely simplistic view of digital. From a practical standpoint it is generally true, however, as your thresholds get noisier, the receiving circuit has to guess as to whether it's a 0 or a 1. Granted, even if it makes an error, you'll probably never hear it as it's one bit out of many. OTOH, the same type signal in your computer will drive it to it's knees because every bit is critical.

Digital audio, be it HT, cell phone, whatever, will typically work until it doesn't. The threshold is almost, but not quite like throwing a switch. Analog actually holds up better after a certain point because the signal is still there, however noisy; where a digital system becomes random junk.

Only partially applicable, I know. But it's an important distinction in general.


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