Oeyvind,

   An exponential curve would be one like y = 2 ^x where the normalized
index is in the exponent not in the base. For your particular case where the
table value is the square of the index I'd call it a quadratic curve.

David Bowen

On 9/29/07, Oeyvind Brandtsegg <obrandts@gmail.com> wrote:
>
> I would like to create a table containing a an exponential curve (or
> so I thought),
> where the table value equals the normalized index raised to the 2nd power.
>
> for example, for a table size of 4(+1) I would have these values:
> 0, 0.0625, 0.25, 0.5625, 1
> being calulated as:
> (0/4)*(0/4), (1/4)*(1/4), (2/4)*(2/4), (3/4)*(3/4), (4/4)*(4/4)
>
> This is the curve I would expect when using an exponential curve for
> mapping of midi controller values.
> It would be nice if I could find a GEN routine that did this, and I
> expected GEN05 to do it, but it seems I have misunderstood something
> about exponential curves as I don't get this curve with GEN05.
>
> Could someone please explain how GEN05 calculates it's values,
> and indicate what would be the correct term for the curve I describe above
> ?
>
> best
> Oeyvind
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