Jazz

I've used an expr object to make a slider go from 38 to 20000 exponentially, for use in a parametric eq patch ive made. My lecturer used the object for a demonstration patch he made and it works pretty well. I need to convert the outputted number from expr back into the original slider value exponentially, basically by reversing the equasion in expr, but I don't understand the arguement in expr to be able to do this. The arguement in expr is as follows:

here's just the conversion part of the patch, could someone please explain the equation and how I do what I previously explained?

I've used an expr object to make a slider go from 38 to 20000 exponentially, for use in a parametric eq patch ive made.  My lecturer used the object for a demonstration patch he made and it works pretty well.  I need to convert the outputted number from expr back into the original slider value exponentially, basically by reversing the equasion in expr, but I don't understand the arguement in expr to be able to do this.  The arguement in expr is as follows:

expr-exponential-slider

The formula is: x=20000*y^2.718
You need y: y=(x/20000)^(1/2.718)

I have been thinking about this for a while now, and

would like to know what the opinions of the community

Apple will be making their newer computer models

equipped with the intel processor, so my prediction is

At this point in time I ask if you think it's a good

investment of a programmer's time to add Altivec code

(where possible, of course) to his/her custom objects.

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I have been thinking about this for a while now, and
would like to know what the opinions of the community
are...

Apple will be making their newer computer models
equipped with the intel processor, so my prediction is
that slowly the PPC will disappear.
At this point in time I ask if you think it's a good
investment of a programmer's time to add Altivec code
(where possible, of course) to his/her custom objects.

------------------------------------------------------------
THIS E-MAIL MESSAGE IS FOR THE SOLE USE OF THE INTENDED RECIPIENT AND MAY CONTAIN CONFIDENTIAL AND/OR PRIVILEGED INFORMATION.  ANY UNAUTHORIZED REVIEW, USE, DISCLOSURE OR DISTRIBUTION IS PROHIBITED.  IF YOU ARE NOT THE INTENDED RECIPIENT, CONTACT THE SENDER BY E-MAIL AT SUPERBIGIO@YAHOO.COM AND DESTROY ALL COPIES OF THE ORIGINAL MESSAGE. WITHOUT PREJUDICE UCC1-207.
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Im not sure if its possible, but can you use the accelerate framework 

that apple provides, or is that only for Obj-C code? if you can use 

Accelerate, it should give you altivec as well as SSE2/3 codepaths, no?

if not, id still say yes, as most people are running G4/G5 based 

On Oct 25, 2006, at 3:17 AM, Luigi Castelli wrote:

> I have been thinking about this for a while now, and

> would like to know what the opinions of the community

> Apple will be making their newer computer models

> equipped with the intel processor, so my prediction is

> At this point in time I ask if you think it's a good

> investment of a programmer's time to add Altivec code

> (where possible, of course) to his/her custom objects.

> ------------------------------------------------------------

> THIS E-MAIL MESSAGE IS FOR THE SOLE USE OF THE INTENDED RECIPIENT 

> AND MAY CONTAIN CONFIDENTIAL AND/OR PRIVILEGED INFORMATION. ANY 

> UNAUTHORIZED REVIEW, USE, DISCLOSURE OR DISTRIBUTION IS 

> PROHIBITED. IF YOU ARE NOT THE INTENDED RECIPIENT, CONTACT THE 

> SENDER BY E-MAIL AT SUPERBIGIO@YAHOO.COM AND DESTROY ALL COPIES OF 

> THE ORIGINAL MESSAGE. WITHOUT PREJUDICE UCC1-207.

> Tired of spam? Yahoo! Mail has the best spam protection around

Im not sure if its possible, but can you use the accelerate framework  
that apple provides, or is that only for Obj-C code? if you can use  
Accelerate, it should give you altivec as well as SSE2/3 codepaths, no?

if not, id still say yes, as most people are running G4/G5 based  
systems for a while now.

> Hi everyone,
>
> I have been thinking about this for a while now, and
> would like to know what the opinions of the community
> are...
>
> Apple will be making their newer computer models
> equipped with the intel processor, so my prediction is
> that slowly the PPC will disappear.
> At this point in time I ask if you think it's a good
> investment of a programmer's time to add Altivec code
> (where possible, of course) to his/her custom objects.
>
> Please advise.
>
> Thanks a lot.
>
> - Luigi
>
>
> ------------------------------------------------------------
> THIS E-MAIL MESSAGE IS FOR THE SOLE USE OF THE INTENDED RECIPIENT  
> AND MAY CONTAIN CONFIDENTIAL AND/OR PRIVILEGED INFORMATION.  ANY  
> UNAUTHORIZED REVIEW, USE, DISCLOSURE OR DISTRIBUTION IS  
> PROHIBITED.  IF YOU ARE NOT THE INTENDED RECIPIENT, CONTACT THE  
> SENDER BY E-MAIL AT SUPERBIGIO@YAHOO.COM AND DESTROY ALL COPIES OF  
> THE ORIGINAL MESSAGE. WITHOUT PREJUDICE UCC1-207.
> ------------------------------------------------------------
>
>
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com


expr exponential slider