Lives fader curve

[stefan-tiedje]

I just wonder how to translate correctly the fader position of a track fader I grab with live.observer into correct levels. The 0 dB value for examples seems to be 0.842457. which would be 1.0 as factor in Max. Fader all up translates to + 6 dB (2.0) according to the labeling in Live...

[julienb]

I guess you can use a little equation to map values.
It all depends of the curve you want to use: linear, logarithmic, your-own-equation ?!

http://www.cycling74.com/docs/max5/tuto ... ter18.html is a good beginning.

[stefan-tiedje]

I know all of this, I want the exact same curve as Live is using. Do you know the equation which is utilized in Live?

Stefan

[julienb]

I guess you can test logarithmic or linear...

[mzed]

I would like to know about the curve for the External Audio Effect. It tops out at +24dB, so it's different from the faders.

mz

[julienb]

little measure can drive you to know how these curves go...
cause I'm quiet sure abes didn't build curves as unlinear, unpolynomial curves

[stefan-tiedje]

little measure can drive you to know how these curves go...
cause I'm quiet sure abes didn't build curves as unlinear, unpolynomial curves

This is the result of my measurements. Save the first as LiveCurve.maxpat and the second as LiveCurve.maxhelp...

An exact formula (for [expr] or even an external for translation (like atodb/dbtoa) would be way more efficient though, but this info has to come from ableton...

LiveCurve.maxpat:

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LiveCurve.maxhelp

<pre><code>
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-----------end_max5_patcher-----------
</code></pre>

[julienb]

indeed

[ztutz]

Thanks Stefan!