ASUS Xonar D1 User Manual

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ASUS Xonar D1 

Xonar D1 provides advanced Acoustic Echo Cancellation (AEC) for best voice 

communication quality over your speakers. AEC technology can eliminate up-to-

40dB speaker echo return and suppress noises into your microphone for easier 

conversation experience. AEC is an innovative feature to make Xonar D1 the 

best sound card choice for online chatting in VOIP applications (Skype, MSN, 

Google, QQ, etc.) or online gaming. AEC provides the following benefits to you:
•  Reduce the voice acoustic echoes like speakerphone devices when others talk 

to you on line

•  Minimize the playback sound echoes into your microphone during gaming or 

music playback

•  Effectively suppress background or system noises into your microphone

•  32-bit floating point algorithm providing precisely adaptive echo cancellation 

performance up to 40dB

•  Supports all VOIP applications and online games

To achieve the best performance of AEC function, the ideal system requirements 

are as follows:
1.  Speakers and microphone are low distortion (max. THD < %)
2.  Flat frequency response between 300~4KHz
.  Use omni-direction electret microphone with >=40dB sensitivity
4.  The microphone is more than 30cm far from PC’s speakers (fix the distance) 

and do NOT turn your speakers too loud

5.  Put your microphone 20~30cm away from you (fix the distance) and do NOT 

speak too close or too loud into the microphone to avoid signal clipping and 

distortion. Enable “microphone boost” on Xonar D1 audio center mixer to get 

proper input signal level.

6.  It’s suggested to disable original AEC function residing in some of the soft-

phones or voice communication programs to get best performance from 

Xonar D1 audio card.

Adjusts the cut-off frequency (50~250Hz) for LFE (low-

frequency effects) signals. Xonar D1 will filter out the bass 

signals below the crossover frequency from small speaker 

channels and forward them to the subwoofer. The higher 

the crossover frequency, the more bass signals will be 

subtracted.

AEC function will be only suitable for bi-direction voice communication 

applications. The speaker type will be set as  speakers and special voice 

processing mode while AEC is applied (all audio effects will be suspended and 

those controls on audio center will be frozen.). After you finish the voice-over-

IP applications, please remember to turn it off for normal high-fidelity audio 

playback mode.