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

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Subject: Re: [linux-audio-dev] LADSPA proposal ...
From: Marcus Andersson (marcus.t.andersson_AT_spray.se)
Date: Sun May 16 2004 - 10:14:46 EEST

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

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