Custom Firmware on the OP-1

OP-1
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I see one of TE uploaded one of your moded screens to their Instagram. I guess they must be ok with it.

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@TabascoEye


Very nice demonstration! Really does remind me of the TB-303 somehow, but still different.
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@daninski: link?

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Pls post some videos :slight_smile:

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Oh, it isnā€™t a TE guy. I thought it wasā€¦ It was Jespers name linked in it that confused me.


appols.
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This thread is like listening to opera.
I have no idea what anyone is sayingā€¦but I like it.

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But can you get a calculator on there?

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So, I finally managed to create a flashable custom firmware on Windows using the XZ utils and GNU Tar ā€¦ on OSX it was a no go for me unfortunatelyā€¦

However, I now have a custom firmware with the filter fx and iter synth (using the same default_parameters as slump synth) enabled though I am not sure if these parameters for iter are correct since all the knob changes didnā€™t change the sound that muchā€¦ anyway it works :slight_smile:

The (multi) filter is great and I still do not understand why they left this one outā€¦ Yes we have Nitro, but I think all the different filter types and definitely the included distortion unit makes it really unique and different compared to Nitroā€¦ Itā€™s already included in previous firmware files for so longā€¦

Same goes for ā€˜Ape Tapeā€™ which clearly isnā€™t the proper fx name reference if there is anyā€¦ Itā€™s already there in the first op1_11701 firmware file available at the link from @husker (thanks man), but I canā€™t find any clear references (except for a reference to apetape.svg) in the firmware file to what could possibly be the right fx name for it.

Seems like the Ape Tape is probably named ā€˜tapetrixā€™. Found that in two places in the firmware, but itā€™s not in the effects list so I just got ā€œunknown fx nameā€ againā€¦

I think the ā€˜tapetrixā€™ refers to the memory 1 and 2 buttons. Check out op1.db - master you see trick_1 and trick_2.

There are references to the lpc fx in the firmware file so that probably just needs the right parameters to startup I thinkā€¦

There is also a reference to ā€˜unknown fx modeā€™ so maybe that can be used/enabled somehowā€¦

Btw. After checking out some older firmware files it seems that up to firmware op1_12788 there was a stereo delay (called odly.svg) on the drawing board, but like the (stereo) chorus which isnā€™t there in the beta anymoreā€¦ they have dropped itā€¦ probably to much/unstable CPU usageā€¦?

Anyway, thanks again @TabascoEye, @wavi and @husker :slight_smile:

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I donā€™t think lpc and apetape have code in there anymore.
But I hopefully will find out. I installed IDApro tonightā€¦

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@jellygeist we will see :o)

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Yup. "Iter" is confirmed. Uploading to youtube...

Sounds great! Sounds a little cpu-expensive too, which is a good thing. I see the debate shifting further between new sonic engines and long overdue usability features - also a good thing. Looks like a default/fallback UI, and wouldnā€™t that be amazing - access early beta without the graphics - my guess is not many people would wait for the graphics if they could have the sounds.

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TE including the Filter in next OS seems like a no-brainer. Agree with comments above saying canā€™t understand how/why it hasnā€™t been added already. Be great to have that standard multimode filter and drive alongside the quirkier OP fx.

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@rephazer gratz on getting the fw working! Thanks for your findings!

Good point that tapetrix must be M1 and M2 buttons. I tried ape on the oldest os I could find but again I got "unknown fx type 'ape'".

@TabascoEye you're probably right. Hopefully you get some details with IDA Pro. Seems like it's a pretty hardcore tool :P


I'm wondering wether I should release my unpacker/repacker now. The info is out there and people seem to be using it, so I don't really see much difference other than making it easier.. I would need to add a proper disclaimer and instructions first. What do you guys think? Good or bad idea?
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I'm wondering wether I should release my unpacker/repacker now. The info is out there and people seem to be using it, so I don't really see much difference other than making it easier.. I would need to add a proper disclaimer and instructions first. What do you guys think? Good or bad idea?

ā€œThe info is out thereā€ is on the side of overstatement since all it takes is deleting this thread and it will disappear. Would be nice to publish a page with the research, somewhere else on the web. Make the information resilient.


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@eesn we were thinking we could use GitHub for publishing the information.

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share +1

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@eesn we were thinking we could use GitHub for publishing the information.

github is a smart choice. Its wiki is a little limited but text files in a folder would make decent docs too. I see your iter video has gone private now?

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@rephazer
re: iter
From what I heard from the demos, iter seems like a feedback-based source (hence the name iter-ate)
White seems to be feedback amount, so if its set to minimum, other parameters wonā€™t do much. try turning it up. (I havenā€™t used it myself, just speculating)
a little like how the delay or sideband in cwo affect the sound more when feedback is upped.

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github seems like the logical choice.


I look forward to having deadMau5 and animal drumming in my sequencer while using the new filter effect all on my leaked beta OS> make it so scotty!
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Good luck with reverse engineering. Yes, it would be great if TE finally open sources the firmware.

I also would like to customize my synth gear and for that reason would pick Critter and Guitari Organelle or KDJ-One (once it becomes available).

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