#406

I just replaced a dirty potentiometer on my Three Sisters and this is the pot I used: https://www.thonk.co.uk/shop/alpha-9mm-pots-dshaft/ (B10K - D shaft - Alpha Vertical 9mm Potentiometer).

2 Likes
#407

Thats funny mine has just started to do a similar thing, I have found that its more noticable when i first turn my system on after I move the knob abit it seems to go… Was going to leave it to see if it was just some grime or somthing and if it would clean itself up. Possibly wishful thinking, do you guys think this will only get worse over time? I have seen some videos of people spraying contact cleaner into pots on guitar amps to clean up the crackle, is this worth trying?

#408

Is the Alphapotcalypse over? It’s been a few months since I checked Tayda’s stock…

1 Like
#409

Mouser was out-of-stock when I checked recently, but Thonk seems to have them in-stock. I ordered ~20 a couple weeks ago and they just arrived.

1 Like
#410

I might try something like the Amazon link below and shoot a bit of air in the module, I’ve been meaning to get one anyway just to clean my front panels in the narrow areas. I don’t know if it’ll be much help but I’ll let you know how it goes.
In the meantime I’ve contacted Mannequins, il share my findings whenever I get a reply.

https://www.amazon.co.uk/rosenice-Cleaner-Suction-Syringe-Laboratory/dp/B078WL8LKT

2 Likes
#411

Ah nice thank you for the link, I will maybe also invest in one of those and see how things go with that for now!

#412

I ended up getting this on a recommendation from a photographer friend who’s also into Eurorack and, while it did nothing at all to help with my Cold Mac, it turns out it’s a great tool to clean up dust on your panels :slight_smile: I heard back from Whimsical Raps: turns out my knob needs a replacement, so I’ll have to send it in for repair unfortunately.

3 Likes
#413

Ah nice thank you for the recommendation!! I defintly need something for dusting in tight spots even if it’s not going to help my cold mac. Ah no, I thought it may be the case, mine doesn’t look as though its improving either so looks like I will also have to send Whimsical Raps an email. Thankyou for your updates! :slightly_smiling_face:

1 Like
#414

Hi hijacking this comment with a noob question Lol, but is it possible to use cold Mac as a standard vca as in patch a envelope into it to control Adsr of a vco? Considering getting one for my small system.

HELP ~ small modular setup
#415

Yes! You can use it as a VCA.
You could look at COLD MAC: A Technical Map which is a great guide or this thread which has lots of neat things you can do with it.

4 Likes
#416

Thnx!!! I’ll check it out

#417

i’ve got a scratchy pot on my CM and was wondering if the B10K will work ?

#418

It should! I am planning on replacing a pot on my Cold Mac and AFAICT it uses the same pot as Three Sisters. I think all of the Mannequins pots are B10K: https://www.whimsicalraps.com/pages/support-faq#scratchy-pot

1 Like
#419

ahhh wonderful thanks:)

#420

I’m not sure if anyone has posted this patch yet, but I just stumbled on this oscillator patch. Seems to only like a pretty narrow, farty frequency range. The frequency changes with the knob and is only audible from about 10:30 to 1:00.

  • OR to SURVEY
  • MAC to OR 1
  • Listen to CREASE

Could be specific to my case, too, if it’s picking up some noise from somewhere.

Edit: Just tested, and as I suspected, this also works using AND1 in with AND out. This also gives a slightly wider pitch range, and in this case the knob enables sound from noon up.

There’s actually all sorts of similar patches, I think the significant part is getting CREASE involved in some kind of logic loop. Plugging into OR1 to start is handy because it’s normalled to AND1.

I don’t know why but I’m really into these “wrong” sounds. Coming out of a utility, they’re that much tastier.

10 Likes
#421

can a comparator be mac’d ?

i.e. +5v when a signal is higher than another signal, 0v when low ? or any other way to get gates out of continuous signals ?

i’m a big cold mac baby!

2 Likes
#422

As far as I know the answer here is—no. The logic section will give you the higher of two signals at the OR out and the lower of the two signals at the AND out. Depending on the signals this could theoretically make gate-y behavior I think? but not exactly what you’re talking about.

More usefully maybe—I have successfully used the crease output to give me a sharp rising edge for triggering things. There is a comparator in the crease circuit I believe! but obviously not what you’re talking about exactly either…

#423

Can you say more about this? I have had a hard time grokking some of those aspects of CM …

Thanks!

#424

I’m hesitant to ever say Cold Mac can’t do something because then somebody contrives some (sometimes convoluted) way to make it do it, at least sort of. But there’s certainly no binary/gate generation circuitry in Cold Mac. An entire fourth column of comparator outputs (gates) might’ve been an interesting expansion of the Cold Mac concept.

Cold Mac’s domain is really the continuously fluctuating voltage (audio or CV), and it excels at translating one fluctuating voltage into one or more others, with or without additional input signals. In that respect, Cold Mac is theoretically an ideal companion to a comparator module that depends on external voltages to compare, such as the best-in-class Joranalogue Compare 2. Cold Mac might derive one or both voltages for comparison (and/or it might provide the CV over the comparison window, in the case of a comparator like Compare 2).

3 Likes
#425

Not quite what you asked, but if you patch A into OFFSET and B into FADE, then patch RIGHT OUT into CREASE IN, you should get a sharp rising edge from CREASE OUT whenever A exceeds B.

If your signals are relatively devoid of high frequency content (smooth CV), then this same patch might also give you a reliable trigger out of MAC by patching CREASE OUT to SLOPE IN and maxing SURVEY.

7 Likes