Re: [Sursound] Powering the DR-680 - Energizer Rechargeable results.

[John Leonard]

Not as good as the Li-Ion pack, but not bad at 3 hours 15 minutes approx. I 
missed the exact cut-off as I had to answer a phone call and when I came back 
in to the room, the batteries had died. Maplin has packs of four of these 
batteries with charger at a sale price of £14.95.

Tomorrow I'm back at Bentwaters with my tame Spitfire, which has had an engine 
change and so sounds rather different, for a set of recordings for a future CD 
release. I'll have a whole bunch of stuff to record with - from a ULN-8 down to 
a Zoom H1, although I suspect I won't use that much.

The DR-680 will be used for recording close-up using either the SPS200-SB or 
the TetraMic, and possibly with Sennheiser MKH418 and a Schoeps MK8/MK4 M/S 
combination. Take-offs and landings later in the day with the ST-250 and the 
SPS-200, and possibly the TetraMic as well. Everything will be relying on 
battery power...

Nice day for it, though!

Best wishes,

John


On 17 Apr 2011, at 22:45, John Leonard wrote:

> Next step is a set of Engergizer 2450 mA/Hr rechargeables, which I'm charging 
> overnight now.

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Re: [Sursound] distance perception in virtual environments

[dw]

On 17/04/2011 02:28, Junfeng Li wrote:

Dear list,

I am now wondering how to subjectively evaluate distance perception in
virtual environments which might be synthesized using WFS or HOA (high-order
ambisonics). In my experiments, the sounds were synthesized at different
distances and presented to listeners for distance discrimination. However,
the listener cannot easily perceive the difference in distance between these
sounds.

Anyone can share some ideas or experiences in distance perception
experiments? or share some references on this issue?

Thank you so much.

Best regards,
Junfeng
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Hi List,
Just popped in.. It's been a while!

IMO it is a combination of time-of-flight and the inverse square law, 
where t=0 is a virtual point in time determined by the brain as an 
intercept by "plotting" a function of the intensity of (primarily) 
transverse reflections against time.  Fortunately it is not necessary to 
work out how the brain might do this. One needs to concentrate 
maximising the availability, and accuracy of the information that would 
be needed to make such a calculation possible, without making too much 
muddy reverb. in the process.  Mono reverb does not seem to play much, 
or possibly any, part in this. It seems to be extracted in some way from 
larger ITDs and ILDs ie. transverse discrete reflections. It took me 
several years to work all this out, and nobody seems to have 
independently come  to the same conclusion in the last decade or so.. so 
it must be wrong. At least it is free and in the public domain now! My 
Heli.wav on "Audio and Three Dimensional Sound Links* (long gone) was a 
product of precisely this method of distance synthesis.


Regards,
David Wareing.
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Re: [Sursound] Powering the DR-680

[John Leonard]

You do need to be a bit careful with some of this stuff from Hong Kong; some 
older types of Li-Ion battery have a nasty habit of bursting into flames 
unexpectedly.

Regards,

John



On 19 Apr 2011, at 00:04, Brian Dasilva wrote:

> Go to ebay and search for sale #   28064464 This is a  6800mah Li Battery 
>  I think this would work out of the box.  It is cheap but it IS in Hong 
> Kong... (puts us all on a level field) I'm going to try itBrian

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[Sursound] S(PACE) symposium (2)

[Dylan Menzies]

The following binaural files are available for download in advance so that 
they can be listened to on personal music players during one of the talks-


www.lozze.info/MTI/1.wav
www.lozze.info/MTI/2.wav
www.lozze.info/MTI/3.wav
www.lozze.info/MTI/4.wav
www.lozze.info/MTI/5.wav

Best Regards,

Dylan Menzies
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[Sursound] S(PACE) symposium

[Dylan Menzies]

Just a reminder that a symposium on spatial technology in music will take 
place on 4th May 1-6pm at Studio 1, PACE Building, Richmond St., 
Leicester.


The speakers are-

Scott Wilson
Jo Anderson
Jorn Nettingmeier
Peter Batchelor
Lorenzo Picinali


Best Regards,

Dylan Menzies

--

An afternoon symposium on the use of use of spatial sound techniques in
music will be taking place at De Montfort University, Leicester UK on
Wednesday 4th May. It will feature talks from members of the Music
Technology and Innovation Group and from outside. The idea is intersperse
the talks with illustrative clips played on the PACE rig. I would like to
encourage a balance of technical and aesthetic viewpoints.

Everyone is welcome to attend this free event. There will be a tea break 
half way, and afterwards there will be plenty of time to talk more over 
beer and most likely, curry.


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