getting time/x-value from an env at a given level/y-value?

[Michael Zacherl]

Hi, I ran into a problem where I need to adapt old presets to a new parameter structure.
Which appears to be a pain … alas.
Point is I'm using envelopes as translation curves for MIDI-CC values.
So I need to get a new value I need the time/x-value of an existing envelope to
take this to the new envelope and get the respective level/y-value.
Old presets loaded into the new structure tend to 'explode', i.e. get very loud.
It's not just about volume, it's several parameters related to one MIDI-CC.
Is there a way to solve this?
Thanks, Michael.

--
http://mz.klingt.org




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[felix]

there may, and most probably will be more than one x for an Envelope's y

look at Array asArrayForInterpolation

you can use that table to search for the first x that aprox equals y

Post by Michael Zacherl
Hi, I ran into a problem where I need to adapt old presets to a new parameter structure.
Which appears to be a pain 
 alas.
Point is I'm using envelopes as translation curves for MIDI-CC values.
So I need to get a new value I need the time/x-value of an existing envelope to
take this to the new envelope and get the respective level/y-value.
Old presets loaded into the new structure tend to 'explode', i.e. get very loud.
It's not just about volume, it's several parameters related to one MIDI-CC.
Is there a way to solve this?
Thanks, Michael.
--
http://mz.klingt.org
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http://www.beast.bham.ac.uk/research/sc_mailing_lists.shtml
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[James Harkins]

Post by felix
there may, and most probably will be more than one x for an Envelope's y
look at Array asArrayForInterpolation
you can use that table to search for the first x that aprox equals y

Perhaps more straightforward is array = myEnv.discretize(arraySize). Then
you can use array.indexInBetween(value) for the first match, then scale it
to the envelope length.

array.indexInBetween(value) / array.size * env.duration

Untested.

hjh

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