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Dolby Headphone / Dolby Digital Plus functionality provide an enhanced audio experience when using headphones. For content that has been encoded with Dolby Digital Plus audio, playback is transformed into a personal surround sound experience.
The difference is very noticeable and for most listeners will count as a very significant improvement (especially when watching movies). However, the software tricks used to achieve the effect may not appeal to audio purists. Dolby-encoded content can be downloaded through the Nokia Trailers application and, in due course, via the third party Voddler video-on-demand service.
Got the FP1 on my 701.
Dolby Digital really enhances the clarity and sourround sound.
We can clearly observe the motion of the sound around ears which is not possible when it is turned off.
Thanks for your reply.
My previous post is for normal audio and videos where DD enhances the sound.
Bacause of your reply I could able to searche the web and found some videos at Doby.com itself.
Download especially the third video with name
select mp4 small.
Copy it to your phone and turn on DD symbol and listen.
Also see Dolby headphones and how it works.
Now yes I'm confident to say that I'm hearing a true 5.1 surround sound with complete bass effect.
Thanks to Nokia for this awesome update called Belle FP1.
The sound provided through 2 speakers or headphones is Virtual surround. The trick is it uses phase difference in the audio signal.
There are headphones like Razer Megalodon where sound is Virtual dolby surround.
DD+ files seems to be working nicely on the Nokia 700 also.
Off topic a bit, do normal DD 5.1 files not play on these devices, but only DD+?
Software update could resolve your issue.
Check for update via Nokia suite or using software update on your phone.