# Two's Complement issues

**URL:** <https://forum.electra.one/t/twos-complement-issues/256>\
**Category:** Bug reports\
**Created:** [December 6, 2020, 7:54pm UTC](https://forum.electra.one/t/twos-complement-issues/256 "2020-12-06T19:54:08Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![four\_corners](https://avatars.discourse-cdn.com/v4/letter/f/96bed5/32.png) [@four\_corners](https://forum.electra.one/u/four_corners)\
**Post date:** [December 6, 2020, 7:54pm UTC](https://forum.electra.one/t/twos-complement-issues/256/1 "2020-12-06T19:54:08Z")

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I noticed a previous firmware was suppose to add support for Two’s Complement, but I can’t seem to get it to work correctly with my Oberheim Matrix 1000 using Sysex.

When I set Minimum and Max values in the Electra One editor (-63 and 63 respectively), when turning the Electra knob, the value of 1 is showing as 20h in Midi monitor when it should still be just 1, and -62 is showing up as 00h in Midi Monitor.

My understanding is that it should be like this…

- the value 0 means 0,
- values from 1 to 63 mean 1 to 63,
- 64 means the most negative value: -64,
- 65 means -63, 66 means -62, and so on,
- 127 means -1.

Can this be corrected?  
Thanks!

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**Author:** ![four\_corners](https://avatars.discourse-cdn.com/v4/letter/f/96bed5/32.png) [@four\_corners](https://forum.electra.one/u/four_corners)\
**Post date:** [December 7, 2020, 8:47pm UTC](https://forum.electra.one/t/twos-complement-issues/256/2 "2020-12-07T20:47:46Z")

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Any thoughts on this?

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**Author:** ![Tomas](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.electra.one/tomas/32/201_2.png) [@Tomas](https://forum.electra.one/u/Tomas)\
**Post date:** [December 8, 2020, 7:27am UTC](https://forum.electra.one/t/twos-complement-issues/256/3 "2020-12-08T07:27:58Z")

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Hi. Current firmware does not support Two’s Complement. It will be re-introduced in the next firmware release.

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**Author:** ![four\_corners](https://avatars.discourse-cdn.com/v4/letter/f/96bed5/32.png) [@four\_corners](https://forum.electra.one/u/four_corners)\
**Post date:** [December 8, 2020, 7:44am UTC](https://forum.electra.one/t/twos-complement-issues/256/4 "2020-12-08T07:44:52Z")

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Ah okay. At least I know it wasn’t something I was doing incorrectly. Thanks!

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**Author:** ![martin](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.electra.one/martin/32/145_2.png) [@martin](https://forum.electra.one/u/martin)\
**Post date:** [December 9, 2020, 9:11pm UTC](https://forum.electra.one/t/twos-complement-issues/256/5 "2020-12-09T21:11:11Z")

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Already working on it, it will be back in upcoming release. If everything goes ok, it will be out before end of the week.

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**Author:** ![Tomas](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.electra.one/tomas/32/201_2.png) [@Tomas](https://forum.electra.one/u/Tomas)\
**Post date:** [December 13, 2020, 8:17am UTC](https://forum.electra.one/t/twos-complement-issues/256/6 "2020-12-13T08:17:08Z")

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@four_corners Hi, new firmware 1.3.1 and App was just released: [Firmware 1.3.1](https://forum.electra.one/t/firmware-1-3-1/279)

Now you can set SignMode: Two’s Complement for controls with negative min value.