Search found 946 matches

by pld
Mon Jul 27, 2020 2:25 am
Forum: Eurorack Modules
Topic: Supercell: expanded version of Clouds + Superparasites firmware
Replies: 400
Views: 51210

Re: Supercell: expanded version of Clouds + Superparasites firmware

Yes, please tell me more about exploitation and open source, and how this productive, good faith discourse where everyone assumes the most charitable interpretation creates such a positive environment that incentivises releasing more. I'm super glad I get to spend additional time supporting even mor...
by pld
Mon Jul 27, 2020 12:39 am
Forum: Eurorack Modules
Topic: Hemisphere for Ornament and Crime
Replies: 1142
Views: 85324

Re: Hemisphere for Ornament and Crime

Does anyone know why this is? The internal DAC used for the offset has a long settling time and drifts after the value is set (apparently if if it's the same value?) IIRC the app and calibration menu update the offset more frequently than the "normal" path, so you get two different values (one timi...
by pld
Tue Jul 21, 2020 8:10 am
Forum: Eurorack Modules
Topic: Hemisphere for Ornament and Crime: Logarhythm Branch
Replies: 130
Views: 4423

Re: Hemisphere for Ornament and Crime: Logarhythm Branch

Thanks for the info! By "sporadic", does it some and go, or once it manifests, it stays? Sporadic as in it's generally unpredictable as to when it will appear. But when it does, only a power cycle helps. As mentioned, the cases I've seen don't look much like your screenshot -- it tends to be more g...
by pld
Mon Jul 20, 2020 2:41 pm
Forum: Eurorack Modules
Topic: Hemisphere for Ornament and Crime: Logarhythm Branch
Replies: 130
Views: 4423

Re: Hemisphere for Ornament and Crime: Logarhythm Branch

The horizontal striations change with the adjacent screen data. Has anyone experienced anything like this with O_c? FWIW there is a long-standing, but sporadic issue where the o_C screen gets scrambled. It's usually a lot more corrupted than that though, oddly enough the display content often flips...
by pld
Thu Jul 16, 2020 3:31 am
Forum: Music Tech DIY
Topic: MCP4822 Implementation
Replies: 15
Views: 323

Re: MCP4822 Implementation

You can not have : in the definition of the formal parameters. Also, if it is an assignment for default values with no arguments passed in the function call, that would be spi=SPI not spi: SPI A : is correct when it's a type hint. In this case it'd make sense to specify the SPI and Pin types. Ugh, ...
by pld
Thu Jul 16, 2020 1:49 am
Forum: Music Tech DIY
Topic: temps_utile / 6 x clock generator [build thread etc]
Replies: 785
Views: 55515

Re: temps_utile / 6 x clock generator [build thread etc]

consumer wrote:
Wed Jul 15, 2020 9:55 pm
Thanks pld!!
Can I just build and program your "fix/misc_fix" branch (i.e. Step 3 from https://github.com/mxmxmx/temps_utile-/wiki/firmware) and start running with that, or is it more nuanced than that?
Thanks again
Yeah, that should work if you grab the .zip with code from the branch in step 2.
by pld
Wed Jul 15, 2020 1:39 am
Forum: Music Tech DIY
Topic: MCP4822 Implementation
Replies: 15
Views: 323

Re: MCP4822 Implementation

there are no jobs in micropython. in contrast, there are a lot of jobs in python 2 or python 3. this is why in my opinion (you can ignore it), I would think java would be a better fit for esp32. There will still be a large amount of transfer so jumping straight to "no jobs in micropython" and "dead...
by pld
Tue Jul 14, 2020 2:23 pm
Forum: Music Tech DIY
Topic: MCP4822 Implementation
Replies: 15
Views: 323

Re: MCP4822 Implementation

micropython != python. Even in regular Python you can still force the type with something like ctypes.c_uint16, but I think the micropythony thing would be (rusty...) self.spi.write(bytes[data >> 8, data & 0xff]) It'd still be easier to just see what's happening at the pins, that'll yield more clues...
by pld
Mon Jul 13, 2020 10:08 am
Forum: Music Tech DIY
Topic: MCP4822 Implementation
Replies: 15
Views: 323

Re: MCP4822 Implementation

The easiest way will be to scope the pins and see what's actually being sent...
If I had to guess, you might have to force it to send a uint16_t because the default `int` is probably 32 bits, in which case it'll see two bytes worth of zeroes.
by pld
Mon Jul 13, 2020 4:32 am
Forum: Music Tech DIY
Topic: MCP4822 Implementation
Replies: 15
Views: 323

Re: MCP4822 C++ class

You might have to be more specific, 99% of the implementation will be platform-dependent SPI handling or based on other requirements (e.g. hardware CS, DMA). The protocol itself is super simple. IIRC the Mutable Module Tester uses it, but that's pretty AVR-specific.
by pld
Sun Jul 12, 2020 12:53 am
Forum: Music Tech DIY
Topic: temps_utile / 6 x clock generator [build thread etc]
Replies: 785
Views: 55515

Re: temps_utile / 6 x clock generator [build thread etc]

Was this some inept input of buttons on my part or is a result of inept soldering? OR BOTH!!!???!!! Or... dun dun duunnn.... neither. I'd suspect that given the code heritage tU might be afflicted by same symptom as o_C, if an app uses too much processing time the screen can glitch (see e.g. here a...
by pld
Sat Jul 11, 2020 12:25 am
Forum: Eurorack Modules
Topic: Ornament and Crime for Dummies?
Replies: 42
Views: 2881

Re: Ornament and Crime for Dummies?

Thank you pal. Does it mean I could use some kind of VCA to do that and fine tune cv amplification for my needs, or I should better dig into o_C calibration? Yes, you need to scale the incoming voltage or find some other means of indirection from the keyboard voltage (switch? addressing sequencer s...
by pld
Fri Jul 10, 2020 2:48 pm
Forum: Eurorack Modules
Topic: Ornament and Crime for Dummies?
Replies: 42
Views: 2881

Re: Ornament and Crime for Dummies?

However, it won't work in that way. The scaling is wrong, and you have to be ~2.5 octaves higher on keystep to get 3 semitones higher on o_C. Yeah, the modulation inputs generally don't respond with 1V/oct or 0.083v steps. I don't recall the exact details, but over the full input voltage range you ...
by pld
Mon Jun 29, 2020 12:27 am
Forum: Music Tech DIY
Topic: ornaments+crimes extended / polymorphic 4x16bit CV generator
Replies: 2537
Views: 158781

Re: ornaments+crimes extended / polymorphic 4x16bit CV generator

Yeah, "recheck and/or reflow and/or clean yer board" as default answers are annoying, but often successful :)
There is a dedicated thread for the uo_C that might have reference points.
~11V anywhere but the rails is likely a short, but can get there with incorrect components around the DAC.
by pld
Sun Jun 28, 2020 10:58 am
Forum: Music Tech DIY
Topic: PyBoard, MicroPython for audio/eurorack/modular
Replies: 4
Views: 179

Re: PyBoard, MicroPython for audio/eurorack/modular

Does it require explicit type declaration? You can do this in python 2 or 3 right now. If you start using object oriented methods then this will compile to really bloated binary. The only way micropython would make it better is if they start forcing style and removing features. Not sure what the ju...
by pld
Sun Jun 28, 2020 8:27 am
Forum: Music Tech DIY
Topic: PyBoard, MicroPython for audio/eurorack/modular
Replies: 4
Views: 179

Re: PyBoard, MicroPython for audio/eurorack/modular

That's the point of micropython though, it's optimized for smaller processors; you can (IIRC at least) even use inline assembler. That doesn't entirely resolve the question of whether it's a good idea but it is quite cool. "Something" with python has been on my to-do list forever... I made a custom ...
by pld
Sat Jun 27, 2020 7:33 am
Forum: Music Tech DIY
Topic: Sonic Potions - Penrose Quantizer DIY Kit
Replies: 489
Views: 41483

Re: Sonic Potions - Penrose Quantizer DIY Kit

There is bug in 1.2 firmware! When input voltage is >2.55V, ADC hysteresis is not working and sometimes Penrose can switch randomly between two notes. It's kind of a shame the forum is still MIA, the hysteresis issue has been covered a few times (e.g. here, albeit in a different format ). There's a...
by pld
Thu Jun 25, 2020 7:47 am
Forum: Music Tech DIY
Topic: o_C drifty - cannot calibrate
Replies: 5
Views: 157

Re: o_C drifty - cannot calibrate

Yeah, you'll probably get more eyes on it in one of the existing build threads. The different resistors serve different purposes, and you shouldn't need 5ppm ones. AFAIK people have built them with plain 1% as well (although there are plenty of uncalibrated ones in the wild so that's not saying much...
by pld
Tue Jun 23, 2020 12:40 am
Forum: Eurorack Modules
Topic: Ornament + Crime
Replies: 2369
Views: 183392

Re: Ornament + Crime

With the module i own now it happens only with Quadraturia 99% i use it, now are 3 days that nothing happens :confused: but with the OC i owned before it happened with more than one app .. Unfortunately, the behaviour seems to be quite unpredictable; I'd never seen it "live" but a few seemed to hav...
by pld
Mon Jun 22, 2020 12:58 am
Forum: Eurorack Modules
Topic: Ornament + Crime
Replies: 2369
Views: 183392

Re: Ornament + Crime

Hey people, seems i have the same freeze/lock up issue discussed here in this topic ,around page 65 and further, linked to 1.3.3 OC firmware and 1.35 teensy loader version .. This happens to me with 1.3.5/1.3.6 OC firmware and 1.48 teensy loader version. Actually this happened to me with two differ...
by pld
Mon Jun 15, 2020 12:52 am
Forum: Eurorack Modules
Topic: Ornament + Crime
Replies: 2369
Views: 183392

Re: Ornament + Crime

KitKatAndy wrote:
Sun Jun 14, 2020 2:38 pm
Thanks! On Hemisphere I already found it, but the original O&C firmware seems not to offer this...
No, it doesn't. I think the Hemispheres one just reads/writes the raw data.
by pld
Sun Jun 14, 2020 9:07 am
Forum: Eurorack Modules
Topic: Ornament + Crime
Replies: 2369
Views: 183392

Re: Ornament + Crime

Hello everyone, finished to built an O&C and checked all the apps. Now I like to switch to hemisphere to check it out. But I couldn´t find anything about saving the original firmwares parameters outside the O&C to restore later if I like to reload it. Is this possible? IIRC Hemisphere had a way to ...
by pld
Tue Jun 09, 2020 1:38 am
Forum: Eurorack Modules
Topic: Hemisphere for Ornament and Crime
Replies: 1142
Views: 85324

Re: Hemisphere for Ornament and Crime

You mean like "Commodore Rulez Tandy Droolz"? ;) :youkids: The thing that interests me is that the 6502 is still in production as the 65C02. The old 6502 would forget its register values if its clock got too slow. The 65C02's register storage is static, so you can single-step it as slowly as you wa...
by pld
Mon Jun 08, 2020 1:58 pm
Forum: Eurorack Modules
Topic: Hemisphere for Ornament and Crime
Replies: 1142
Views: 85324

Re: Hemisphere for Ornament and Crime

chysn wrote:
Mon Jun 08, 2020 1:35 pm
I wonder if anybody would enjoy an open-source 6502-based Eurorack module...?
Hah. Not to revive any dormant rivalries (*) but I had the same idea with a Z80-based thing I put together on a whim last year :)

(*) I also have a spare 6502 somewhere so I kindasorta have a foot in both camps.
by pld
Fri Jun 05, 2020 8:35 am
Forum: Music Tech DIY
Topic: DIY Mutable Unsuccessful Builds
Replies: 3383
Views: 193184

Re: DIY Mutable Unsuccessful Builds

The attached pic with the color codings are the pathways, the readings from my multimeter (from both boards) and what they are labelled in the Eagle file. Every point on each pathway came out with the same voltage. Looks like the silkscreen says -12V right where you're measuring +12V... that's prob...

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