[linux-audio-dev] LADSPA proposal ...

[Marcus Andersson]

Fons Adriaensen wrote:

>On Sat, May 15, 2004 at 07:10:30AM +0200, Marcus Andersson wrote:
>
>  
>
>>Interesting interpretation. This means that the mapping between the 
>>slider and the parameter will be
>>
>>f(x) = k*a^x
>>
>>with k=f(0) and a = f(1) if the slider goes form 0 to 1.
>>    
>>
>
>You probably meant a = f(1)/f(0).
>

Yes, thanks.

>>This also means that it is illegal to include 0 in the parameter range.
>>    
>>
>
>In that case you can use f(x) = x*a^x, with a = f(1).
>

How do I invert this function? I am stuck.

What do you propose in the case of [-20.0, 40.0]?

Marcus