ASUS Xonar DX 7.1 PCI-E Sound Card

Introduction & Specifications

Asus Xonar DXAsus have long been a leader in producing high quality, reliable hardware and components. Testament to this fact is that Asus are a ‘Tier 1’ manufacturer for Intel’s current chipset/motherboard offerings are also among the top manufacturers of both ATI and Nvidia based graphics cards along with their own brand of Notebooks and multimedia. Why then have Asus, up until recently, declined to enter into the soundcard sector, a market previously dominated by a one company – Creative? Only Asus can answer that question I’m afraid but I suspect it comes down to the number of people who value a soundcard over the on-board alternatives most motherboards supply today. Much to my dismay, Creative had the soundcard market all but wrapped up and despite their X-FI range impressing it was sadly let down with poor driver support. Those who were early adopters of Windows Vista will testify that using vista along with an X-FI card was a very frustrating time. Anyone wishing to purchase a card had very limited choices available to them but times have now changed with the advent of relative newcomers such as Auzentech (based on Creative’s X-FI chipset), Razer and C-Media based offerings from Terratec and now Asus, the market is once more alive with choice, not only of manufacturers but of chipset based cards.

Towards the end of last year Asus released a high-end card that was a very viable alternative to X-FI in the DX2. While it didn’t have the X-FI chipset, it did have full EAX support up to level 5 through emulation and it impressed with its excellent gaming performance and audio processing. The plethora of bundled accessories and software was a welcome addition too but the package came in at a hefty price and as such would only be bought by those looking for a luxury, top-end product with little regard of budget. Asus have since realised this and have unleashed a cut-down version of the DX2 in the form of the Xonar DX. With the card coming in at half the price as well as being half the size, have Asus managed to trim some fat away from the DX’s bigger brother without sacrificing the power the flagship card offers – is this simply a fad diet that will be forgotten next week or technological progress that will be the mainstay audio solution in any budget minded gamers PC build? Read on....
Specifications are taken directly from ASUSTeK Computer Inc.
Audio Performance
Output Signal-to-Noise Ratio (A-Weighted):
116 dB for Front-out
112dB for other channels

Input Signal-to-Noise Ratio (A-Weighted):

Output Total Harmonic Distortion + Noise at 1kHz (-3dB) :
0.00056% (-105dB) for Front-out

Input Total Harmonic Distortion + Noise at 1kHz (-3dB) :
0.0004% (-108dB) for Line-in

Frequency Response (-3dB, 24-bit/96kHz format):
<10Hz to 48KHz

Output/Input Full-Scale Voltage
2 Vrms (5.65 Vp-p)
Bus Compatibility
PCI Express
-PCI Express Rev.1.0a specification compatible
-Max. full 2.5Gbps bandwidth per direction and optimized latency for high-definition audio processing
-Compatible with X1, X4, X8, X16 PCI Express slots
Main Chipset
Audio Processor
ASUS AV100 High-Definition Sound Processor (Max. 192KHz/24bit)

24-bit D-A Converter of Digital Sources:
Cirrus-Logic CS4398*1 for Front-Out (120dB SNR, Max. 192kHz/24bit)
Cirrus-Logic CS4362A*1 for other 6 channels (114dB SNR, Max. 192kHz/24bit)

24-bit A-D Converter for Analog Inputs:
Cirrus-Logic CS5361* 1 (114dB SNR, Max. 192kHz/24bit)
Sample Rate and Resolution
Analog Playback Sample Rate and Resolution
44.1K/48K/96K/192KHz @ 16/24bit

Analog Recording Sample Rate and Resolution
44.1K/48K/96K/192KHz @ 16/24bit

S/PDIF Digital Output
44.1K/48K/96K/192KHz @ 16/24bit, Dolby Digital, DTS
I/O Ports
Analog Output Jack:
3.50mm mini jack *4 (Front/Side/Center-Subwoofer/Back)

Analog Input Jack:
3.50mm mini jack *1 (Shared by Line-In/Mic-In)

Other line-level analog input (for TV Tuner or CD-ROM):
Aux-In (4-pin header on the card)

Digital S/PDIF Output
High-bandwidth TOS-Link optical transmitter (shared with Line-In/Mic-In jack) supports 192KHz/24bit

Front Panel Header
Headphone / Stereo Speaker Out
Microphone In
Driver Features
Operation System
Windows Vista(32/64bit)/XP(32/64bit)/MCE2005

Dolby® Digital Live
Dolby Digital Live encodes any audio signal on PC in real-time to Dolby Digital (AC3) 5.1 surround sounds to your home theater environment through one single S/PDIF connection

Dolby® Headphone
Dolby Headphone technology allows users to listen to music, watch movies, or play games with the dramatic 5.1-channel surround or realistic 3D spacious effects through any set of stereo headphones.

Dolby® Virtual Speaker
Dolby Virtual Speaker technology simulates a highly realistic 5.1-speaker surround sound listening environment from as few as two speakers.

Dolby® Pro-Logic IIx
Dolby Pro-Logic II is the well-known technology to process any native stereo or 5.1-channel audio into a 6.1- or 7.1- channel output, creating a seamless, natural surround soundfield.

DS3D GX 2.0
-DS3D GX 1.0 supports EAX gaming sound effects and DirectSound 3D hardware enhanced functions on Windows Vista. (DirectX/DirectSound 3D compatible)

Xonar DX provides VocalFX, the latest vocal effect technologies for gaming and VoIP, including: -VoiceEX: produces vivid environmental reverberation for your voice in EAX games -ChatEX: emulates different background environment effects when you chat online -Magic Voice: changes your voice pitch to different types (Monster/Cartoon…) for disguising your real voice or just for fun in online chatting

Acoustic Echo Cancellation (AEC)
Provides advanced Acoustic Echo Cancellation (AEC, eliminates up-to-40dB speaker echo return) and noise suppression technologies for best voice communication quality in VOIP applications or online gaming

Smart Volume Normalizer™
Normalizes the volume of all audio sources into a constant level and also enhances your 3D sound listening range and advantages in gaming

Karaoke Functions
Music Key-Shifting and Microphone Echo effects like professional Karaoke machine

Professional Bass Management/Enhancement system

Xear 3D™ Virtual Speaker Shifter
Virtual 7.1 speaker positioning

Other Effects
10-band Equalier/27 Environment Effects

3D Gaming Sound Engines/APIs
DirectSound3D® GX 2.0 & 1.0, EAX®2.0&1.0, DirectSound® HW, DirectSound SW, A3D®1.0, OpenAL generic modes, 128 3D sounds processing capability

ASIO 2.0 Driver Support:
Supports 44.1K/48K/96K/192KHz @16/24bit with very low latency
Bundled Software Utility
Portable Music Processor Lite utility
Converts digital music content or CD audio into regular MP3/WMA files with Dolby Headphone, Dolby Virtual Speaker (w/ Pro-Logic II), and Smart Volume Normalization processing (Windows Media Player 10 or above is required)

MCE Software Kit
Software kit with 10-ft GUI for Windows Media Center Edition

RightMark Audio Analyzer 6.0.6
Easy but powerful software intended for testing the quality of audio equipments
As you can see the specification is very impressive. Briefly, the main notable differences in specification between the DX and the DX2 are as follows:
DX vs DX2 Table
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Most Recent Comments

06-05-2008, 06:44:51

With the Xonar DX 7.1 soundcard, have Asus managed to trim the excess fat from it's bigger brother without sacrificing perofrmance? Or have they put the DX on a diet so harsh it can't hold it's own weight with the new influx of audio solutions...

Asus Xonar DX ReviewQuote

06-05-2008, 07:03:23

Nice review webbo.

Good move by Asus tbh, but they need to be on top of the driver support!

Creative could slip further down the pan.Quote

06-05-2008, 07:23:26

Nice review, good to see some soundcard action.

Manufs need to make these cards with; front panel support; connection for internal HMDI support; low profile; solid drivers for XP/Vista 32/64bit - as almost a standard.

Asus are not particularly some1 I`m wanting to either look for support or driver upd8s. They`re are exactly Creative in that department, but they don`t personally fill me with enthusiasm either. That`s just me, I don`t buy their products when there`s a viable alternative for just that reason.

£60 is an ~ok~ price for me. I`d be happier if it settled around £40-£50, but that`ll take some time.

Like to have a comparison playoff with ASUS, Auzen, Creative - and let`s say an Abit IP35 Pro onboard, as a look into the qualities, drivers, performance and price.

For the +/- using Vista 64bit and these choices, I`m edging towards taking the soundcards out of the systems tbh.Quote

06-05-2008, 08:32:30

I was a little hesitant about the price too but when you consider you are virtually getting a D2X (minus the frills) for half the price then it works out at a half decent price point. What most should consider I guess is the need for high performing audio over 'adequate' onboard solutions. IF all you do is surf the net then I guess onboard is fine but if your PC is a multimedia gateway then a dedicated solution is much better imo.

I am also concerned about driver support but we can only hope Asus keep on the ball with this one, either way it surely can't be as bad as Creative.Quote

07-05-2008, 15:26:15

Excellent Review, much respect webbo: Wu-Tang Clan FTW!! I have a cheapo soundcard right now but if I'm looking to upgrade I'll definatley consider this, but tbh I don't know how much benefit I'd get running through the Aux on my 2.1 system, I wish 2.1 was listed as an option on my sound control panel but sadly I'm stuck with 2.0 or virtual 5.1 Quote

07-05-2008, 17:11:01

good review

looks like a niceish card actually

and as for the comment about all the connectors being gold, you make a good point, but on the alternative side, green, pink and blue looks rather tacky ...

gold looks profesional, even if you dont know where to plug your wire Quote

08-05-2008, 04:30:48

Originally Posted by name='Kerotan'
Excellent Review, much respect webbo: Wu-Tang Clan FTW!! I have a cheapo soundcard right now but if I'm looking to upgrade I'll definatley consider this, but tbh I don't know how much benefit I'd get running through the Aux on my 2.1 system, I wish 2.1 was listed as an option on my sound control panel but sadly I'm stuck with 2.0 or virtual 5.1
Do you use headphones at all m8? If so then I'd says it's worth it.

Originally Posted by name='ionicle'
good review

looks like a niceish card actually

and as for the comment about all the connectors being gold, you make a good point, but on the alternative side, green, pink and blue looks rather tacky ...

gold looks profesional, even if you dont know where to plug your wire
Yeah I agree gold looks better(and results in a better connection) and I didn't actually have any trouble connecting the audio up but I could forsee that in the average Joe setup with his case sat in the shade below a desk it would be nigh on impossible to get the right connector in the right hole (!) ahem. It would have been nice of Asus to include the led port lights its bigger brother has. Asus arn't the only ones guilty of this and although it's only a minor point, I thought it was a point worth making nonetheless.

Thx for your kind comments guys - my first review (of many hopefully) on OC3DQuote

08-05-2008, 06:26:58

ne1 recommend any DTS enabled cards?Quote

08-05-2008, 06:47:42

Xonar D2X?Quote

16-05-2008, 21:42:56

Cool review, interested in the newest model. Always nice to have alternatives from the Creative crap... Well, not crap. Hardware is ok, but software/drivers suck. I think Auzentech has a great card which is based on the Creative chip, but costs just as much as the most expensive one too.Quote

03-01-2009, 16:37:40

I know this is reviving an old review/thread but i have been wondering for a while now if yall had to do anything special to get the certain sound settings in BF2 while using this card I've never been able to get them with out an error.Its never let me choose x-fi and ultra.

Reading this review when it came out helped persude me to choose this card instead of a xtreme gamer, I've just never been able to get the Bf2 settings right with any option config.Quote

04-01-2009, 11:33:11

Change the settings in BF2 config. It's the only way you get Ultra settings to work but I have my doubts whether it actually does anything anyhow as I couldn't tell the difference between ultra and highQuote

05-01-2009, 14:48:16

Do you mean in the config files themselves or in the BF2 menu, because when I try the xfi option it just tells me I don't have one. Ty for replying.Quote

05-01-2009, 17:32:27

You wont get ultra settings on any card as it can only be enabled via the config files.

Your soundcard however should be recognised as an XFI, the review sample was.Quote

05-01-2009, 18:17:19

Yeah, that's the problem mine dosent get recognized as an xfi with or with out the gx enabled on the asus control panel, I don't know if its the card itself or what its currently set at hardware and high in the BF2 menu, is there a big change between that and xfi mode with the EAX enabled? Thanks againQuote

06-01-2009, 05:36:48

What operating system are you using?

EAX can only be emulated in vista thorugh Alchemy software and the Asus exquivelant. The sounds are pretty much the same. Perhaps the easiest place to test it is in two areas.

Kubra dam - go into one of the tunnels and everything should echo/reverb.

Karkhand - Iirc you can here the occassional dog barking and a bell occassionally ringing.

The main effects though are the echo's that I could discern and a clearer more 'atmospheric' sound. There is little to choose between the XFI EAX and Xonar GX though so I wouldn;t lose sleep over it, especially as BF2 is now an aging game by todays standards anyway.Quote

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