Cycling 74 » Topic: mapping MIDI velocity to 0. to 1. range (non-linear) http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/feed Wed, 19 Jun 2013 19:40:04 +0000 http://bbpress.org/?v=2.2.4 http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-41208 <![CDATA[mapping MIDI velocity to 0. to 1. range (non-linear)]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-41208 Fri, 05 Dec 2008 19:16:27 +0000 Mitch Turner I want to efficiently map MIDI velocity (0 to 127) into an amplitude range from 0 to 1. I want it to be a non-linear mapping.

I’m doing this:

input_value (0 to 127 MIDI velocities)
|
[pow 4.]
|
[/ 260144640.]
|
output_value (0. to 1. for use with a [*~] object)

Is there a more efficient way to do this using standard math objects?

Also, how would I write the above using the [expr ] object?

Thanks in advance,
Mitch

]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146525 <![CDATA[Re: mapping MIDI velocity to 0. to 1. range (non-linear)]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146525 Fri, 05 Dec 2008 19:22:32 +0000 MIB do you know about linedrive and scale?? both can do exponential mapping.

]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146526 <![CDATA[Re: mapping MIDI velocity to 0. to 1. range (non-linear)]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146526 Fri, 05 Dec 2008 19:32:42 +0000 Mitch Turner Yes, I know about them. I’d like to be able to port this over to Pd very easily. I’n not sure they are available for Pd.

Mitch

]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146527 <![CDATA[Re: mapping MIDI velocity to 0. to 1. range (non-linear)]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146527 Fri, 05 Dec 2008 19:34:38 +0000 Luke Hall I usually use [expr pow(($i1/127.),$f2)]. If the right inlet is 1 the conversion is linear. I’d recommend starting with something like 0.7 and adjusting it from there.

lh

]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146528 <![CDATA[Re: mapping MIDI velocity to 0. to 1. range (non-linear)]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146528 Fri, 05 Dec 2008 22:11:07 +0000 Peter Castine The lp.scampf object from Litter Power will do this with its default settings and a ‘pow $1′ or ‘exp $1′ message, where the parameter controls the steepness of the curve.

Later on I read you want a Pd solution. In that case you’ll probably have to roll your own. For better or worse, I do not see a Litter Power for Pd in the immediate future.

Good luck anyway,
Peter

]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146529 <![CDATA[Re: mapping MIDI velocity to 0. to 1. range (non-linear)]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146529 Sat, 06 Dec 2008 15:06:40 +0000 Mitch Turner Thanks to all for the help.
Mitch

]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146530 <![CDATA[Re: mapping MIDI velocity to 0. to 1. range (non-linear)]]> http://cycling74.com/forums/topic/mapping-midi-velocity-to-0-to-1-range-non-linear/#post-146530 Mon, 08 Dec 2008 04:32:15 +0000 dodgeroo you can create curves in a buffer

On Sat, Dec 6, 2008 at 4:06 PM, Mitch Turner wrote:

>
> Thanks to all for the help.
> Mitch
> –
> http://home.lagrange.edu/mturner
>

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