Search found 2607 matches

by mskala
Sat Sep 19, 2020 6:16 pm
Forum: Eurorack Modules
Topic: List of Voltage Ranges of Modules
Replies: 26
Views: 564

Re: List of Voltage Ranges of Modules

As soon as a mfr publishes a set of voltages as a spec, somebody is going to use it against them to cry foul on their module. Yes, we see threads like that on here occasionally, where someone measures a voltage to inappropriate precision and is concerned that it's not the number they expected. Or s...
by mskala
Sat Sep 19, 2020 6:25 am
Forum: Modular Synth General Discussion
Topic: Alternate Front Panels: Get Permission?
Replies: 16
Views: 390

Re: Alternate Front Panels: Get Permission?

Are module makers registering copyrights on panel design? I can see logos as a trademark, but we're in for a world of hurt if a knob placement or panel layout gets registered. The people in the IP office don't know/care about modular, and awarding a design copyright could potentially impact all the...
by mskala
Fri Sep 18, 2020 5:37 pm
Forum: Eurorack Modules
Topic: List of Voltage Ranges of Modules
Replies: 26
Views: 564

Re: List of Voltage Ranges of Modules

I think part of the reason that analog modules in particular frequently don't publish voltage ranges is that for many circuits, voltage ranges are not actually very meaningful . Given something like an LM13700-based VCA, what's the voltage range for the signal input? Well, if you put in 10000 volts ...
by mskala
Wed Sep 16, 2020 9:29 am
Forum: Eurorack Modules
Topic: What a used Natural Gate in VG condition looks like
Replies: 50
Views: 1649

Re: What a used Natural Gate in VG condition looks like

Of course it’s a real word- “Mint condition” comes from coin collecting, as in, appears as if just left the mint. There can be important technicalities with this sort of thing, too. I recently had occasion to try to estimate the value of some vintage baseball cards - not a hobby I'm involved in mys...
by mskala
Wed Sep 16, 2020 8:07 am
Forum: Modular Synth General Discussion
Topic: Market normalization - ModularBid
Replies: 10
Views: 291

Re: Market normalization - ModularBid

re: "Once it's built it doesn't take much money to keep it online". No, but it's not a static thing. And that's where the real time will be spent ongoing. Those correlations need to be done for each new module appearing. I wouldn't wish that job on anyone . As you've correctly said, that work would...
by mskala
Tue Sep 15, 2020 9:11 am
Forum: Eurorack Modules
Topic: What a used Natural Gate in VG condition looks like
Replies: 50
Views: 1649

Re: What a used Natural Gate in VG condition looks like

I don't understand why Rabid Elephant uses PCB panels. They claim on their Web site that these actually cost more than doing it properly. Is that reason enough? Anyway, it probably has an effect on durability.
by mskala
Mon Sep 14, 2020 10:14 pm
Forum: Modular Synth General Discussion
Topic: Market normalization - ModularBid
Replies: 10
Views: 291

Re: Market normalization - ModularBid

I've played occasionally with ideas for an automated system builder based on a constraint solver, with rules like needing so many VCAs per oscillator, and configurable parameters for emphasizing different kinds of patching, emphasis on low cost or specific functionality, fit within a given number of...
by mskala
Sun Sep 13, 2020 11:01 pm
Forum: Eurorack Modules
Topic: Individual module....dedicated power switch ?
Replies: 20
Views: 390

Re: Individual module....dedicated power switch ?

So we shouldn't be leaving any modules patched up when turning power on or off? Or am just I not reading this right? I leave my synth patched while turning it on and off. If the modules are all on the same power supply then there should be no problem. I wouldn't patch between two racks and power up...
by mskala
Sat Sep 12, 2020 10:48 pm
Forum: Eurorack Modules
Topic: Individual module....dedicated power switch ?
Replies: 20
Views: 390

Re: Individual module....dedicated power switch ?

Patching signals into a powered-down module is unwise. Usually the absolute maximum ratings on inputs of ICs are along the lines of "any voltage between the power rails ." An unpowered IC will usually have its power rails at zero, and a signal voltage that would be ordinary and expected when the IC ...
by mskala
Fri Sep 11, 2020 2:16 pm
Forum: Eurorack Modules
Topic: Sooooo frustrated with threaded strips
Replies: 65
Views: 2109

Re: Sooooo frustrated with threaded strips

From what I understand there was a couple competing old specs about screw holes, which is why some have slots, though it probably isn't this far off? Only ever one standard for Eurorack screw holes, and Analog Systems didn't follow it. But some Eurocard modules (not Eurorack synthesizers) have oval...
by mskala
Fri Sep 11, 2020 8:26 am
Forum: Music Tech DIY
Topic: How much drift is a good thing?
Replies: 15
Views: 341

Re: How much drift is a good thing?

Just use a small amount of thermal grease. You don't need -and won't benefit from- epoxy assuming you use the method detailed above. Which will also allow you to put a small tiewrap arounf both transistors AND the tempco, holding them firmly in relative position. If you don't have an electronics st...
by mskala
Sat Sep 05, 2020 8:15 am
Forum: Music Tech DIY
Topic: PCB shelf life
Replies: 16
Views: 320

Re: PCB shelf life

Silver can be vulnerable to tarnishing; it'll certainly remain usable longer than bare copper, but not as long as ENIG (gold). HASL (dipped solder plating, with or without lead) is pretty common, especially on cheaper boards, and that, too, will last pretty long but not forever - because the tin sur...
by mskala
Thu Sep 03, 2020 5:27 pm
Forum: Eurorack Modules
Topic: Are Powered Cases Too Expensive?
Replies: 121
Views: 3005

Re: Are Powered Cases Too Expensive?

It always strikes me as funny how some people will drop $500 or more on a single module, but then balk at the price of a decent roadworthy case with a robust supply like a Doepfer P6. But that's just people, I guess.¯\_(ツ)_/¯ It's probably part of the same effect as spending a lot on sound source m...
by mskala
Sun Aug 30, 2020 9:19 am
Forum: Eurorack Modules
Topic: Are Powered Cases Too Expensive?
Replies: 121
Views: 3005

Re: Are Powered Cases Too Expensive?

Flounderguts wrote:
Sat Aug 29, 2020 9:16 am
Wait...you *want* a plastic synth case?
Well, a lot of people want *cheap* to the exclusion of any other consideration.
by mskala
Fri Aug 28, 2020 9:23 am
Forum: Eurorack Modules
Topic: Are Powered Cases Too Expensive?
Replies: 121
Views: 3005

Re: Are Powered Cases Too Expensive?

I don't know if it's worth trying to answer the original question, but: The market is tiny. That means there aren't many economies of scale and all development and overhead costs need to be split among far fewer sales. A powered Eurorack case has basically the same parts as a briefcase plus a laptop...
by mskala
Wed Aug 26, 2020 5:56 pm
Forum: Music Tech DIY
Topic: Eurorack why is noone using the 5V of the psu?
Replies: 31
Views: 650

Re: Eurorack why is noone using the 5V of the psu?

yentzee wrote:
Wed Aug 26, 2020 4:27 am
What would be an efficient circuit to get the 5V without the need of heatsinks (sorry I am a Beginner).
A switching regulator. But you'll have to withstand the derision of wigglers who think switching regulators are the devil.
by mskala
Tue Aug 18, 2020 10:52 am
Forum: Music Tech DIY
Topic: Cleaning up a Meanwell for basic euro use
Replies: 23
Views: 721

Re: Cleaning up a Meanwell for basic euro use

Yes, ignorance is bliss. If a person is willing to accept the potential problems that come from powering their modules with an unregulated supply then there is no problem. If you have hang around Muff’s long enough, you will eventually see multiple posts across multiple manufactures complaining abo...
by mskala
Wed Aug 12, 2020 7:40 pm
Forum: Eurorack Modules
Topic: Supercell: expanded version of Clouds + Superparasites firmware
Replies: 569
Views: 58517

Re: Supercell: expanded version of Clouds + Superparasites firmware

The thing about open source licenses is that you don't have to agree to them, but if you don't, then you don't have a license at all. So deciding that you don't want to abide by the license on a work, or that you think it's not valid, doesn't mean that then you get to copy and derive from the work w...
by mskala
Tue Aug 11, 2020 3:39 pm
Forum: Music Tech DIY
Topic: Different between 10k and 500k pot
Replies: 2
Views: 137

Re: Different between 10k and 500k pot

Depends what you're connecting to them. Ideally, you need the pot to be significantly more than the output impedance of the output that's driving it, and significantly less than the input impedance of the input it's driving. If not, in either direction, you'll get significant signal loss through the...
by mskala
Tue Aug 11, 2020 10:42 am
Forum: Music Tech DIY
Topic: economically friendly analog VCO DIY solution
Replies: 33
Views: 914

Re: economically friendly analog VCO DIY solution

Some of the parts I use come from China. I did not say otherwise, and I'm not going to get into a political discussion here.
by mskala
Tue Aug 11, 2020 10:27 am
Forum: Music Tech DIY
Topic: economically friendly analog VCO DIY solution
Replies: 33
Views: 914

Re: economically friendly analog VCO DIY solution

Out of all the module suggestions that get posted in a thread like this one, only one will actually be the cheapest . It's worth having more than one suggestion posted nonetheless, because both the OP and the other people who read the thread benefit from getting an idea of what options are available...
by mskala
Tue Aug 11, 2020 9:53 am
Forum: Music Tech DIY
Topic: economically friendly analog VCO DIY solution
Replies: 33
Views: 914

Re: economically friendly analog VCO DIY solution

There's a common pattern where someone will decide they need ABC function, so they ask "What's the cheapest module to get ABC function?" Then they buy it, and they learn why it was cheapest , and they sell it at a loss from what they paid, and post "I found out I needed XYZ function... what's the ch...
by mskala
Mon Aug 10, 2020 6:58 pm
Forum: Music Tech DIY
Topic: economically friendly analog VCO DIY solution
Replies: 33
Views: 914

Re: economically friendly analog VCO DIY solution

Threads asking for the cheapest possible modules always worry me, but I recently launched the Middle Path VCO, which is two triangle cores, sync, and a Gilbert sine shaper. It might be worth a look. The cores have exponential FM and the shaper can be used to apply through-zero linear phase modulatio...
by mskala
Sun Aug 09, 2020 11:19 am
Forum: Music Tech DIY
Topic: pt2399-based delay schematic problem
Replies: 9
Views: 270

Re: pt2399-based delay schematic problem

A few thoughts: Substituting a non-polarized capacitor won't help. The problem is that you have a capacitor there at all, and no DC path. My suggestion would be to replace the capacitors labelled "47uF1" and "10uF2" with wires. You don't need them. The DC offset from the delay output will be amplifi...
by mskala
Sat Aug 08, 2020 6:36 pm
Forum: Music Tech DIY
Topic: pt2399-based delay schematic problem
Replies: 9
Views: 270

Re: pt2399-based delay schematic problem

The positive input of U1C needs a DC path to ground, else it will charge up its blocking capacitor with bias current. Common problem when people try to combine AC coupling with a noninverting op amp circuit; discussed a little in my article at https://northcoastsynthesis.com/news/one-minute-op-amp-a...

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