Jeff Kelly wrote:
Multipsk has a binaural feature in their software. Couldn't get it working too good though. Perhaps my pc wasn't fast enough. Any other DSP programs have this feature?
Jeff
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I looked at Multipsk as a result of a search on all the DSP/soundcard
programs I could find. Yes, it indicates that it has the ability. This
is strickly my opinion but this software has the worst User Interface
that I have expereinced in a long time. Certainly not intuitive. Also as
it is 'deriving' the binaural experience via software/DSP there is going
to be a definite delay in what goes it to what comes out. This delay can
be somewhat problematic with CW, expecially if you want to use QSK.
Lastly, it is terrible overkill for a problem that has such an
elegant/simple solution. At least that is my thinking and why I went the
way I went.
Jeff, please note that I decided to try this as an experiment. I found
that my late night operating required headphone operation to keep the
peace in the family. The more I listeded with cans the more I noticed
the 'hum' and general muddiness generated from a non-spacial audio
presentation. It is absolutely amazing how much difference takes place
just separating the low frequency and high frequency components.
Background nose just seems to drop out in significance while the station
more or less pops into presence. If you have ever been an avid music
listener via home stereo recall what happens when you switch from mono
to stereo... how pleasant and comfortable the spacial sound stage is....
the vocalist is in front of you and the instruments to the left and
right... etc., etc... Now recall what happened if your speakers where
out-of-phase... how disorienting the listening experience became. There
were separate sounds but they just didn't have a focus. Anyway, the
Binaural CW audio filter builds a simulated sound stage effectifvely due
to the less compicated nature of a CW audio signal (as compared to a
musical instrument of the human voice). It works. I have noticed some
effect when listening to SSB as well but that is anedotal I suppose.
Generally you would need a much more complex spacial synthesis system
for voice. NOT what this was about. :)
Jerry, KG6TT
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