Got a doppler shift as well as stereo effects based on events taking place 
in SDL.  This scene file isn't just modifying a pre-existing buzz sound, but 
rather povray is actually writing the score for a file to be used by csound. 
My attempt to do this particular one is of course heavily inspired by Rune's 
posts of last year.

(I must admit that there was a bug in this version such that I had to 
comment out a single line from the povray-composed score file-- I was too 
lazy to re-render the whole thing just to get rid of it.)

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Attachments:
Download 'flybuzz0801.mpg' (285 KB)

Greg M. Johnson wrote:
> Got a doppler shift as well as stereo effects based on events taking
> place in SDL.

I don't know if it's just me, but while I can vaguely hear the 
stereo-effect, I can't hear any Doppler shift. The engine sounds like it's 
at the same pitch throughout the entire clip.

I just wanted to let you know. I thought that maybe perhaps you have 
attached by mistake an earlier version of the clip. Or maybe it really is 
just me.

Best regards,

Rune
-- 
3D images and anims, include files, tutorials and more:
rune|vision:  http://runevision.com
POV-Ray Ring: http://webring.povray.co.uk

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Here's a version where I tripled the frequency spread due to doppler.

The formula goes something like:   old_frequency +300*vdot(velocity, 
particle_position - hearers_position)

So with this actor travelling in a circle, there is no net doppler at the 
point of being furthest away.



"Rune" <run### [at] runevisioncom> wrote in message 
news:42345e45$1@news.povray.org...
> Greg M. Johnson wrote:
>> Got a doppler shift as well as stereo effects based on events taking
>> place in SDL.
>
> I don't know if it's just me, but while I can vaguely hear the
> stereo-effect, I can't hear any Doppler shift. The engine sounds like it's
> at the same pitch throughout the entire clip.
>
> I just wanted to let you know. I thought that maybe perhaps you have
> attached by mistake an earlier version of the clip. Or maybe it really is
> just me.
>
> Best regards,
>
> Rune
> -- 
> 3D images and anims, include files, tutorials and more:
> rune|vision:  http://runevision.com
> POV-Ray Ring: http://webring.povray.co.uk
>
>

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Attachments:
Download 'flybuzz10001.mpg' (421 KB)

Greg M. Johnson wrote:
> Here's a version where I tripled the frequency spread due to doppler.
> 
I can't hear nothing, with media player. I did hear sound with previous 
version, though.

Regis.

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Uh, sorry.  I guess I'm still figuring out what the best volumes should be, 
albeit some things are just plain wierd on my system.

I could hear it on two different XP boxes with the sound turned up.   I'd 
happily repost another one with louder sound if it actually would benefit 
anyone...


"regdo" <reg### [at] wanadoofr> wrote in message news:42374cb1@news.povray.org...
> Greg M. Johnson wrote:
>> Here's a version where I tripled the frequency spread due to doppler.
>>
> I can't hear nothing, with media player. I did hear sound with previous 
> version, though.
>
> Regis.

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Greg M. Johnson wrote:

> I could hear it on two different XP boxes with the sound turned up.   I'd 
> happily repost another one with louder sound if it actually would benefit 
> anyone...
> 
I turned the sound up *very* high before posting. It sounds like there's 
no sound on my comp.

 >?<
Regis.

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Interesting.
I'm going with Rune on this. I hear modulation of Amplitude (which sounds 
right) but the buzz Frequency seems constant to my ear.
Both  versions work on my XP box with WMP.
DLM


"Greg M. Johnson" <gregj;-)565### [at] aolcom> wrote in message 
news:423645c4@news.povray.org...
> Here's a version where I tripled the frequency spread due to doppler.
>
> The formula goes something like:   old_frequency +300*vdot(velocity, 
> particle_position - hearers_position)
>
> So with this actor travelling in a circle, there is no net doppler at the 
> point of being furthest away.
>
>
>
> "Rune" <run### [at] runevisioncom> wrote in message 
> news:42345e45$1@news.povray.org...
>> Greg M. Johnson wrote:
>>> Got a doppler shift as well as stereo effects based on events taking
>>> place in SDL.
>>
>> I don't know if it's just me, but while I can vaguely hear the
>> stereo-effect, I can't hear any Doppler shift. The engine sounds like 
>> it's
>> at the same pitch throughout the entire clip.
>>
>> I just wanted to let you know. I thought that maybe perhaps you have
>> attached by mistake an earlier version of the clip. Or maybe it really is
>> just me.
>>
>> Best regards,
>>
>> Rune
>> -- 
>> 3D images and anims, include files, tutorials and more:
>> rune|vision:  http://runevision.com
>> POV-Ray Ring: http://webring.povray.co.uk
>>
>>
>
>
>

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