Reversing Sensor Data

shawnt's icon

I want to use incoming pot data to decrease gain on one channel and increase gain on the other. How would I do this? I tried an inverse scale, but that didn't seem to work. Any thoughts?

Wetterberg's icon

M4L.bal1~

shawnt's icon

Wetterberg:

I'm not sure how this would work. I'm trying to take serial data received from a potentiometer.

Wetterberg's icon

could you show some of your data then? Otherwise we'll just be guessing, really.

shawnt's icon

The data that is feeding in is a number in a range from 0 - 1023 which is converted from voltage. I run the data into Arduino2Max through an Analog input then out to my gain sliders. Hope that helps.

blakemcconnell's icon

if you just want a simple linear relationship use "expr 1023 - $i1"

metamax's icon
Max Patch
Copy patch and select New From Clipboard in Max.

metamax's icon

[!- 1023] is faster than both scale and expr.

shawnt's icon

Metamax:

Just used the (!-) object and it worked great. I ended up scaling the data numbers down to the max number I set for my various gains so the action went smoother from my perspective. Seemed to work great, thank you.

Wetterberg's icon

Note you'll have a dip in volume in the middle; that's the reason why I recommended m4l.bal1~ - it does a proper mix between the two.

I still think it's the best approach, hehe.