Search found 247 matches

by kdjupdal
Thu Feb 18, 2021 4:10 pm
Forum: Oakley Sound Systems
Topic: Parts recommendations thread
Replies: 14
Views: 2416

Re: Parts recommendations thread

I bought this ribbon cable for the VCA-X:
https://www.sparkfun.com/products/8535
Ready-made with connector. It should work fine, right?
by kdjupdal
Fri Feb 12, 2021 7:32 am
Forum: 5U Format Modules
Topic: What are your 5U plans for the weekend?
Replies: 2294
Views: 108491

Re: What are your 5U plans for the weekend?

(delete)
by kdjupdal
Fri Feb 12, 2021 7:25 am
Forum: 5U Format Modules
Topic: What are your 5U plans for the weekend?
Replies: 2294
Views: 108491

Re: What are your 5U plans for the weekend?

No 5u plans for the weekend. I just wanted to make a comment on shipping. I wonder if it's got something to do with covid even if I don't know how. It seems packages sit longer in customs than before. Maybe they are overwhelmed with packages. I'm waiting for a shipment from the US (non-synth) for ov...
by kdjupdal
Wed Feb 03, 2021 5:51 am
Forum: Music Tech DIY
Topic: Something New from Doc Sketchy
Replies: 743
Views: 55346

Re: Something New from Doc Sketchy

Very interesting. I've got a few questions: - is it a thru-zero freqency shifter? I think some FS are and some are not, and maybe it doesn't matter much anyway, but would be interesting to know. - for normal shifting, what do you recommend as a modulator? Does the sine wave need to be as clean as po...
by kdjupdal
Sun Jan 31, 2021 5:15 am
Forum: 5U Format Modules
Topic: My oscillators are bullies
Replies: 51
Views: 1662

Re: My oscillators are bullies

Yes, your keyboard is really beautiful looking. Did you document somewhere how you built it? Did you use the Doepfer kit?
by kdjupdal
Sun Jan 17, 2021 4:11 am
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 17
Views: 692

Re: log: building Oakley modules in dotcom format

I've built another ADSR. I found when I tested the vca on it that it had an ugly overdriven sound - everything I fed through it became a pulse wave. I guessed it could be because of a faulty chip. Since I know the LM13700 is used for vcas, I suspected that chip could be the culprit, and it turned ou...
by kdjupdal
Tue Jan 12, 2021 1:50 pm
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 17
Views: 692

Re: log: building Oakley modules in dotcom format

Happy new year!
I've had a month break. Time to continue this building project. I'm almost regretting starting it, as it is a lot of work, but I need to finish it. My plan is 2 ADSR, 1 VC-ADSR, 3 VCA, 1 VC-mixer, and the dual-LFO.
by kdjupdal
Wed Dec 30, 2020 8:19 am
Forum: Music Tech DIY
Topic: (deleted)
Replies: 0
Views: 73

(deleted)

(deleted)
by kdjupdal
Sun Dec 20, 2020 6:00 pm
Forum: Modular Synth General Discussion
Topic: Practice techniques for synthesizer performance / sound design
Replies: 19
Views: 653

Re: Practice techniques for synthesizer performance / sound design

Good idea for a thread. For now I've only got one contribution. As an exercise for making sounds, read the soundonsound "synth secrets" articles, and try some of those patches. Patching up imitations of real instruments on the modular can be a good exercise. Even if that is not your end goal, it wil...
by kdjupdal
Fri Dec 04, 2020 5:32 am
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 17
Views: 692

Re: log: building Oakley modules in dotcom format

Re:synthesis is one option. A pity if they don't take new orders.
Others are Lower West Side Studios, (allthough he said he would close his panel making business), tardishead here on muffwiggler, or analogcraftsman.com. I think there are some more.
by kdjupdal
Mon Nov 30, 2020 4:28 pm
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 17
Views: 692

Re: log: building Oakley modules in dotcom format

I plan to have them made for me by someone... there are several now that offer to make MU panels.
by kdjupdal
Sat Nov 28, 2020 8:47 am
Forum: Music Tech DIY
Topic: USB oscilloscope for synth
Replies: 20
Views: 575

Re: USB oscilloscope for synth

Good sugggestion. The only stumbling block is that the soundcard won't pass DC signals.
by kdjupdal
Sat Nov 28, 2020 6:58 am
Forum: Music Tech DIY
Topic: USB oscilloscope for synth
Replies: 20
Views: 575

Re: USB oscilloscope for synth

ADALM 2000, similar to Analog Discovery 2, only 12bit IO ADC/DAC but way cheaper: https://eu.mouser.com/ProductDetail/Analog-Devices/ADALM2000?qs=xbccQsLEe0e03sUxIHWPSw== Seems interesting. 12bit should be plenty, providing a resolution of 4096 so you won't be able to see the steps. What kind of co...
by kdjupdal
Fri Nov 27, 2020 10:35 am
Forum: Music Tech DIY
Topic: USB oscilloscope for synth
Replies: 20
Views: 575

USB oscilloscope for synth

Hi.

What would be a good USB oscilloscope for showing synth waveforms on a computer screen? Only for visualising waveforms, maybe with good resolution for a big screen. Are there any module oscilloscopes that can connect to a screen?
by kdjupdal
Fri Nov 27, 2020 4:31 am
Forum: Music Tech DIY
Topic: Gate randomizer circuit?
Replies: 12
Views: 246

Re: Gate randomizer circuit?

Hi, I'm looking for a gate randomizer circuit. I don't mean 'random gates' here, as for instance included in the MFOS Noise Cornucopia, but rather a circuit that accepts a gate signal and randomly decides if it may pass or will be muted, preferably even with a "probability pot". This can be done ea...
by kdjupdal
Thu Nov 26, 2020 4:12 pm
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 17
Views: 692

Re: log: building Oakley modules in dotcom format

I like the ring dials! The logarithmic looking scale makes it feel so scientific. 8-) How did you design them? I am about to make some MU panels too for my next Oakley builds, actually the panels are already done and some are also painted black and in blind panel state. But I struggle a bit to find...
by kdjupdal
Thu Nov 26, 2020 8:50 am
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 17
Views: 692

Re: log: building Oakley modules in dotcom format

I've designed a panel for the ADSR and the VC-ADSR. I already built one ADSR, and I decided to change a capacitor and a resistor (on advice from Tony) to achieve slightly less extreme range. Anyway, I measured the times of my module and included them on the panel. Don't know if it is practical or no...
by kdjupdal
Wed Nov 25, 2020 4:09 am
Forum: Music Tech DIY
Topic: Why is it fun to BUILD modular synthesizers?
Replies: 25
Views: 710

Re: Why is it fun to BUILD modular synthesizers?

To expand on your comment about pianists building pianos, I have an engineer friend who loves Bach. Having started to learn to play piano, he undertook building his own harpsichord. Yes now that you mention it, I know people who built their own harpsichord. You can buy a harpsichord kit: http://www...
by kdjupdal
Tue Nov 24, 2020 4:28 pm
Forum: Music Tech DIY
Topic: Why is it fun to BUILD modular synthesizers?
Replies: 25
Views: 710

Why is it fun to BUILD modular synthesizers?

It seems that many people who are interested in modular synths, end up building. It's a slippery slope. I became interested in modular synths, then started to build modules from kits, and I might end up designing my own circuits if I'm not careful. Why is that? Someone starting out playing the piano...
by kdjupdal
Mon Nov 23, 2020 5:22 pm
Forum: Music Tech DIY
Topic: Oh no... (Paia Theremax)
Replies: 8
Views: 324

Re: Oh no... (Paia Theremax)

Update: I replaced the capacitors and the resistor. Some of the solder pads and one trace were damaged so I had to replace it with flying wires. I am sure I got it right, but the theremin was dead anyway, no sound at all. Probably the ICs were destroyed as they are fragile. Unfortunately there are n...
by kdjupdal
Wed Nov 18, 2020 11:25 am
Forum: Music Tech DIY
Topic: Something New from Doc Sketchy
Replies: 743
Views: 55346

Re: Something New from Doc Sketchy

I am interested! Waiting for the demonstration of Messiaen + Bach.
But I'm also interested in your full frequency shifter. Would it be possible to make a full version with additional input for external oscillator? If not I'll have to order both versions.
by kdjupdal
Mon Nov 16, 2020 4:10 pm
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 17
Views: 692

Re: log: building Oakley modules in dotcom format

I am pondering one idea - is the ADSR out really necessary, and what would I lose if I left it out, keeping only 3 jacks? The VCA out will give the ADSR out signal when the VCA is not used, and when it is used you'd want to use the VCA out anyway. Or what do you think?
by kdjupdal
Sun Nov 15, 2020 9:42 am
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 17
Views: 692

Re: log: building Oakley modules in dotcom format

I have just testet the ADSR and it works perfectly! Some of the things that I like about this envelope generator is the linear attack and exponential decay. Also the exponential response of the pots. I am designing a panel myself. Inspired by the moog 911 design, I wanted to show the time in seconds...
by kdjupdal
Thu Nov 12, 2020 12:12 pm
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 17
Views: 692

Re: log: building Oakley modules in dotcom format

I have never used the pot brackets before. I realise that I should have fixed the pots to the panel, before soldering the pots, to ensure they are evenly lined up. Or how do you normally do that?
by kdjupdal
Sun Nov 01, 2020 11:50 am
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 17
Views: 692

log: building Oakley modules in dotcom format

I've decided to build a couple of Oakley modules for my dotcom format synthesizer. No problems yet - just thought I would write a small log. I have built a few modules before, so I'm confident that it will turn out well. I had forgotten how much time it takes, though. Ordering parts, sifting through...

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