# Asymmetric range causes screen garbage \[SOLVED\]

**URL:** <https://forum.electra.one/t/asymmetric-range-causes-screen-garbage-solved/1000>\
**Category:** Bug reports\
**Created:** [October 10, 2021, 5:52pm UTC](https://forum.electra.one/t/asymmetric-range-causes-screen-garbage-solved/1000 "2021-10-10T17:52:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![oldgearguy](https://avatars.discourse-cdn.com/v4/letter/o/f4b2a3/32.png) [@oldgearguy](https://forum.electra.one/u/oldgearguy)\
**Post date:** [October 10, 2021, 5:52pm UTC](https://forum.electra.one/t/asymmetric-range-causes-screen-garbage-solved/1000/1 "2021-10-10T17:52:32Z")

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Working on a Micron editor and ran into something setting up a Filter Keytrack fader.

The range is -100 to +200 for keytracking. Alesis is using 14 bit, 2’s complement signed NRPNs.  
If I set up a fader for -100 to 200, 2’s complement and sweep the fader range, the positive ranges are fine. Once I start going negative and I get to about -39, the numbers start writing past the left edge of the bar until I get to about -63, then they start writing back inside the bar as always.

The values are being sent correctly, but the screen is messed up until I send down a new copy or refresh the screen by changing pages.

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<div class="post-metadata">

**Author:** ![oldgearguy](https://avatars.discourse-cdn.com/v4/letter/o/f4b2a3/32.png) [@oldgearguy](https://forum.electra.one/u/oldgearguy)\
**Post date:** [October 13, 2021, 7:51pm UTC](https://forum.electra.one/t/asymmetric-range-causes-screen-garbage-solved/1000/2 "2021-10-13T19:51:32Z")

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Testing with the interim version provided by Martin has fixed this issue.  
thanks.