Hi,
I need to map number ranges to each other and after trying to apply various math objects to re scale the ranges, I was directed to [transf_fader].

My problem is that I don't fully understand how this object works, I would imagine the break points message in the [transf_fader] input would control the key points within my chosen ranges to scale to. This doesn't seem to be the case for me, or perhaps I'm understanding the object completely wrong.

As an example;

I need to scale 0 - 1.9 onto 0.15 - 0.7, I have an object outputting 0 - 1.9 which needs to smoothly control another object that operates within 0.15 - 0.7.

I used the message [pairs 0 0.15 1 0.4 1.9 0.7[,
My thoughts being that this would map the figures to each other, but it didn't.
Instead once the input slider reaches 1, the output is already at 0.7.

I've probably not understood this object properly so if anyone has a better idea for the scaling process, or a better explanation of the [transf_fader], I'd love to hear it!

I'm not familiar with [trans_fader], but I think [maxlib/scale] would be easier for you here. You could just instantiate it as [maxlib/scale 0 1.9 .15 .7], and that will do it.

Here's an abstraction that works, I added a few comments inside. I don't use extended, so I'm not sure if it has a naming conflict, but you can always rename it to whatever you like.

http://www.pdpatchrepo.info/hurleur/rescale.pd