38
ASUS Xonar DX
No
Item
Description
4
Small/Large speaker
option
Select the speaker type that you connected. If your speaker
type cannot perform low-frequency signals (bass), please
select “Small” speaker type and Xonar DX will filter out the
bass signals and send them to the subwoofer channel. If
those speakers are full-range, you can select the “Large”
speaker type.
Note: Common, cheap PC’s 2-channel speakers are
usually small-type speakers. Please refer to the speaker’s
specification. If you have any questions, please consult
your speaker vendor. However, common 2.1 speakers with
a subwoofer should be categorized as Large speakers
because the subwoofer can redirect the bass signals inside
the two channels to the subwoofer speaker automatically.
6.7
AEC (Acoustic Echo Cancellation)
Xonar DX 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 DX 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%)
2. Flat frequency response between 300~4KHz
3. 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.
