Video A and B alignment jumping after a few mins

Hypno Issue/Bug
1

Hello, big fan of hypno and love the module.
im having a bit of trouble aligning video A and B and then after a while ( 2-3 mins ) it jumps to a non aligned position.
when i first start… i change the B channel to vid… run the scale sliders up and down to the bottom to match them … and then on VCMC i have the vid X crop for A and B on 2 faders
and pull those to 0. and its perfectly aligned.
so at the start i can change feedback mode or mess with any setting and they stay perfectly aligned.
after it happens… i can set them to be aligned using the polarity knob or on a fader using VCMC , but after a while they pop out of alignment without me doing anything… and then thats it… they will be mis aligned every time i change something big like symmetry or feedback mode.

https://file.io/OyRCdN5ay8OA
heres a link to a vid showing it happening after 2 mins 40 seconds of being perfectly aligned.
at second 00:18 in the vid it jumps out of alignment. and after i get it back into alignment ish with the knobs i then scale a and bs x like i did at 00:03 (which stayed aligned)
and it jumps out of alignment this would also have happened if i had changed feedback mode… i kind of get it back with the knobs… then as im adjusting symmetry it jumps out again at 02:15

so i was wondering if there was anything i can do to stop this from happening?. i may sometimes get 10 mins but after its been on and i switch off
its pretty consistently 2-3 mins before it jumps out of alignment. is it a heat thing? i have it in a eurorack case. maybe its how i have my VCMC set up… some sort of alignment lock would make the hypno perfect for me. i dunno if this is just me… as i see nobody else reporting this… could i have a noisy pot? any help on this would be very appreciated.
thank you
Robin.

2

Could you reupload or repost the video of the issue? It’s saying the video has been deleted.

3

Im sorry i dont have anywhere permanent to put it … and i dont think i can embed it.
hopefully this one stays up for a few days.

4

Thank you for the video, that makes it clearer.

Try running Hypno by itself without the VCMC and see if you’re still having that same issue.

5

Hi Naomi, i ran 3 tests over about 40 mins… and yeah it still happens , it seems to happen quicker without VCMC. please see this vid

at 00:10 i set the shape B to Video and adjust the crop holding down right and middle buttons and running both sliders to the middle and down to the bottom… perfectly aligning the two channels at 00:24 , i up the gain a bit to 3 oclock… top 4 knobs are all 12 o clock. then im pressing the top button to change feedback mode at 00:53, i cycle back to no feedback and it holds alignment for a moment until 01:05 and it jumps out… from this point on it will jump out of alignment even if i get it back with the pots when feedback mode is pressed. as seen in the vid.
can you replicate this on your module?
many thanks for investigating this.
Robin.

6

Hi, Have you had a chance to try and replicate this issue.?.. you will need to leave the unit on for over 10 mins at first ive found… and can you try with a pi3 and pi 4… because if its a pi3 thing… then ill pull it out of my eurorack and put a pi4 in now they are back in stock but atm im not sure if its hardware or software… im obviously hoping this can be fixed some how … but i dont know if its just my unit or not.

7

There may be some variation just in the nature of analog potentiometers.

I might suggest either
A: Saving a preset with the videos aligned and recalling that if they become misaligned
or
B: muting one of the videos and just playing a single video. Then, you could unmute and bring the second channel back in if you need it.

8

thanks for getting back to me Naomi,

A does not work… it recalls the settings misaligned.
B sounds like not using it as it was intended to be used.

can i send it back to you for a fix if i pay the postage?

9

Hi, so… i was wracking my brains about what it could be and decided to just try it out of euro rack with a pi4B instead of a Pi3 A + and its fine after 30 mins … so maybe its the 2.3 firmware for the pi3? anyway … im glad i could work it out myself after a few weeks of back and forth with you. if anyone else has this issue ask them to try with a pi4. :wink: im off to record some stuff now its stable. cheers!

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