User`s manual
HEADSPEAKER – 5.1 HEADPHONE SYSTEM
5. Problem s  and S olution s
• If audio doesn't sound 3-dimensional when HeaDSPeaker is connected via USB, make 
sure that the lowest led, ”5.1 PCM/ANALOG”, is lit green. If it isn't, check the audio 
configuration of the computer (as described in chapter 3.). Also check the application's 
audio settings that you're using. Some notes about audio in DVD playback can be found 
below.   If   the   problem   persists,   please   contact   customer   support   by   e-mailing 
support@vlsi.fi.   Please   note   that   support   for   multichannel   USB-audio   is   heavily 
application-dependent.   It  is   always   good   to  remember  that   some audio   applications 
might not support multichannel USB audio at all. In these cases, only stereo sound may 
be available.
• If audio sounds 3-dimensional when using a USB connection, but rear channel imaging 
is   sub-optimal,   check   that   channel   mapping   is   correct   using   the   HeaDSPeaker 
diagnostic application. Switching between 6- and 8-channel firmwares may help (see 
chapter 4.5 for more information).
• If   audio   doesn't   sound   3-dimensional   when   HeaDSPeaker   is   connected   via   analog 
connector, make sure that all effects and/or signal processing is disabled in the audio 
source. It is also possible that that signal is not surround-encoded. In this case, only 
stereo sound will be available.
• Some audio/video player applications may not support 5.1 USB audio. A part  of the 
default installation package is a free Media Player Classic application, which can play 
DVD   audio   in   multichannel   format.   In   some   cases   this   requires   installing   and 
configuring an additional AC3 filter. A free download link for this filter can be found in 
the start  menu folder created by the HeaDSPeaker installer. After installing  the AC3 
filter, check its configuration using the corresponding utility (figure 17). Especially make 
sure that 5.1 channel output is enabled.
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