On 7 January 2013 02:08, Chenrilin <[email protected]> wrote:
>>Do you get the same problem if you playback through four loudspeakers, or
>
>>is it only after HRTF manipulation ?
>
>>* Does the decoding work on speakers (without HRTF) ?
>
> The mics are omnis. And it can work on speakers well. So I think
> X and Y computed is exactly for decoder.
>
Hi,
Seems likely then that the problem is related to the usual "in
head" problem that many (maybe even most) people people have with
simple, non matched HRTF based systems, whether driven from decoded
Ambisonic signals or from binaurally recorded (dummy head) material.
There's been a lot of work on this (just search the AES library, for
instance) and there have been many suggestions for solving this but,
in my opinion, the only one which has anything like a chance for
solving the problem for the majority of listeners is to add head
tracking to the system. This is because if the soundscape stays locked
to the reference frame of your head (as happens without head
tracking), it is _very_ difficult to convince your perceptions that it
is anything but in your head and therefore locking the soundscape to
the external fixed reference plane by using headtracking instead makes
it much more natural to perceive it as external. This is even more
important even than having HRTF's that are the same as, or closely
matched to, your own (though such individualised responses do help).
Strong visual cues can also help and in some cases will be almost as
good at moving the perceived reference frame to the external world as
you get with headtracking - though this is _very_ dependent on the
particular circumstances.
Best regards,
Dave Malham
As of 1st October 2012, I have retired from the University, so this
disclaimer is redundant....
These are my own views and may or may not be shared by my employer
Dave Malham
Ex-Music Research Centre
Department of Music
The University of York
Heslington
York YO10 5DD
UK
'Ambisonics - Component Imaging for Audio'
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