marcuspbu's Avatar

marcuspbu

@marcuspbu

Engineer, full time idiot, synth noob

367
Followers
806
Following
474
Posts
16.01.2025
Joined
Posts Following

Latest posts by marcuspbu @marcuspbu

Post image

For my experiments with the Altair Mini, I made this (ugly) circuit to have access to ยฑ12V and a voltage regulator for 5V, because the Doepfer doesn't deliver that. Are there modules for that, accessing all voltages plus delivering 5V? #synthsky #eurorack #altair

11.03.2026 07:23 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Then I wish you success in all of your future endeavors

08.03.2026 13:46 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Yeah, this post was also shown to me by the "Almighty Algo". The question was sincere, maybe they like keyboards and guitars. And yes, Eurorack can appear rather technical from the outside, but once that is mastered, you can express yourself like on any other instrument. Not soulless at all.

08.03.2026 08:58 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Ich sehe gar kein Maths? ๐Ÿ˜œ

06.03.2026 12:13 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

What do they like?

06.03.2026 10:55 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

One of the next steps should be to control the running program via cv to increase or decrease the amount of pulses (= density). And it is blinky blinky and has lots of switches, so it fits quite well in the modular synth universe, haha

06.03.2026 09:49 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Bass...bass!

05.03.2026 23:11 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Video thumbnail

This is my proof of concept for one channel. The MBasic program on the Altair Mini is triggering the base drum (sample player) of the modular synthesizer. Now that the other optocouplers have arrived it is time for more
#synthsky #eurorack #altair #vintagecomputer

05.03.2026 23:05 ๐Ÿ‘ 12 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0
Post image

I would really like to have a bigger desk for soldering....

05.03.2026 20:13 ๐Ÿ‘ 16 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

Everything is now ready to be connected to my modular synth to trigger a voice (and more in the future). Will keep you posted. The next video should have audio, I hope! :-)
#synthsky #altair #vintagecomputer #euclideanRhythm

04.03.2026 00:47 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Post image Post image

Added a protoboard to my extension unit. Intercepted the LED cable from the "LED Output Register Card" to feed the signal of LED 0 into an optocoupler (using a 74HCT244 as a driver). Wrote a simple MBasic program to implement what is called the "Euclidean Rhythm" in the synth world. #synthsky

04.03.2026 00:45 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Next steps: Have more than one output (waiting for more optocouplers) and improve the program to handle 4 more outputs. Allow phase shifting between outputs by moving the patterns by x steps.

02.03.2026 21:50 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Post image

News from my Altair Mini journey: The basic Euclidean algorithm works in MBasic and the value is shown on LED 0 of the LED output register card. I've also "hacked" the LED ribbon cable and put a 74HCT244 driver in there and an optocoupler, which I'll test next.
#synthsky #altair #euclidean

02.03.2026 21:48 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I was in her free pre-course, too. It was interesting and helpful, but (obviously) it was only about very basic stuff and I couldn't judge if topics like "motivation" and "approaching a new song / session" would have an important role. Technical stuff I can learn, coz that's what I do ;-)

26.02.2026 19:58 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Post image

Here it is

26.02.2026 18:54 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

(2) Will use it for my Altair Mini. But it might also be useful when uploading new firmware to a Eurorack module. It might not work though, as some modules use external power for sensing the connection. It worked for my Altair :-)
#eurorack #altairmini #electronics

26.02.2026 18:53 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

(1) Found this USB power blocker on Amazon if you want to use the power supply and connect your device via USB. Yeah, a stripe of tape will also work - but I really enjoy this.
There are a lot of "data blocker" adapters out there, but only few that block the power: PortaPow USB Power Blocker

26.02.2026 18:50 ๐Ÿ‘ 0 ๐Ÿ” 1 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

A dedicated setup is nice. No moving around after playtime :-)

25.02.2026 22:11 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Wow. Ordered stuff from Thonk (UK) in january for 140GPB and getting a FedEx customs and tax declaration for 73EUR. Shipped to germany.
Wow...
Yeah, Brexit. Fun. Not
#Eurorack #Brexit

25.02.2026 11:11 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Post image

Philosophy hour:
Every empty prototype board is the beginning of a wonderful journey filled with hours of experimentation, measuring, probing and reading. And a decent amount of swearing!
#breadboard #electronics #prototyping

25.02.2026 11:08 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Keep us posted :-)

24.02.2026 21:52 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Yeah, I thought about joining last year to get a more structured approach. But i decided to resume my current route with videos, books and lots of experimentation. What I do miss are talking about it with more experienced users. Yes, Discord, forums and Bluesky give you a bit of that

24.02.2026 20:51 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Post image

Applied transparent shrinkwrap to the labels. That should last
#synthsky #eurorack

22.02.2026 19:45 ๐Ÿ‘ 10 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Ok, which one should I use? Or do you need more information for a clear reading?

21.02.2026 10:49 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Short Kings
Waiting for Godot (shortened)
ADHD approved
Oh there begins another one

21.02.2026 10:46 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Ah I remember that some of those A list artists sold courses called master classes. Is that still a thing? Havent seen any ads for these recently. And yep, it's definitely pricey. I wanted to hear from ppl who took that course. The website is an awful mess, its price only appears on the 2nd page

20.02.2026 23:07 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

That's a rather harsh assessment without having tried any course. Yes, manuals, free videos, talking to experienced modularoids and experimenting might get you far, but a more structured approach might also have its positive attributes?!

20.02.2026 22:57 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Interesting to read from someone who took (and takes) the course. Thank you!
So, you stay part of that community once the course is over? That would be an important point for me actually.

20.02.2026 20:38 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Preview
Enroll - Learning Sound and Synthesis - Sarah Belle Reid Learn modular synthesis online! In this program, Sarah Belle Reid teaches you everything you need to know to make music with modular synths and build dynamic patches using the free virtual Eurorack sy...

Have any of you fine modular folk taken her course? $697 is quite steep. I really enjoy her free and interesting videos on YT, but I'm not such a fan of her bleepy noise music. Don't get me wrong, she's a capable musician, but who can argue when it comes to taste. #sarahbellereid #eurorack #synthsky

20.02.2026 18:36 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 5 ๐Ÿ“Œ 0

Going rogue led to a lot of plugging in and listening on my part. Then i got sick of that and applied the wizardry of organization

20.02.2026 15:12 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0