Low Pass Gates in VCV Rack

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00:00 - Introduction
00:21 - What are Low Pass Gates
03:31 - Patch 1
09:47 - Patch 2
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[@oscargarcia4864]

Thank you so much for this Omri! Although they are quite simple, I've never actually understood LPG's until today. I always reach for a VCA or a filter, but now I will try new stuff with LPG's.

[@gazzar67]

Same here.

[@OmriCohen-Music]

Glad you liked it :)

[@billB101]

I use a Erica Synths Pico LPG in my physical modular, it gives you that nice bubbly Buchla LPG sound.

[@adamsmith5598]

Learned something new today. Thanks Omri.

[@OmriCohen-Music]

Glad it was helpful!

[@sauberkeks]

You are genious ❤ thx for inspiring

[@OmriCohen-Music]

Cheers!

[@LuisTorres-qz5kr]

Thanks Omri, very informative. Plus, love the sounds from the patches. I missed the "live" session.

[@OmriCohen-Music]

Hey, thanks!

[@buzishoham]

great tutorial, thank you!

[@OmriCohen-Music]

Cheers, Boaz!

[@neriluca]

another amazing one.... thx!

[@OmriCohen-Music]

Thanks!

[@JohnoWells]

Wonderful.

[@OmriCohen-Music]

Cheers, man!

[@wilkinx1]

I love LPGs. One of my favorite alternative uses of LPG is as a vactrol-response Attack-Decay EG, just feed +5v DC offset in its input and ping it. Nevertheless, as far as I know, the Low Pass Gates in VCV Rack sounds nowhere close to a real vactrol LPG like LxD / Optomix. Although they functioned the same way, the LPG in VCV Rack sounded like a resonant VCF + VCA and does not kept fully open when CV input is in audio rate.

[@OmriCohen-Music]

Yeah, there are some hardware lpgs, like the optomix that sound just amazing...

[@killiun55]

Yup none of them sound like real LPGs unfortunately. The best emulations i've heard is the one in the Arturia Buchla V and the Softube Doepfer one.

[@magusinstrumentalis4500]

@@killiun55 Have you tried our Yog-Sothoth module? We think it comes a lot closer than many of the software low pass gates: soundcloud.com/user-702601513/easel-esque

[@mntbighker]

Very useful BTW

[@OmriCohen-Music]

Thanks!

[@AdiGoldsteinComposer]

❤️

[@psyco2486]

NIIICEEEE

[@OmriCohen-Music]

Thanks!

[@jjbing3]

😲👏🏾

[@crozpatching4598]

Eyo! LPGs are the best! Thats why I have 6 :P

[@OmriCohen-Music]

Sweet!

[@mntbighker]

I have had the Optomix on my wish list for quite a while. The only "LPG" I have now is the Freak running Nurage. I think it may be months until Optomix is available, so I may have to settle for something less desirable.

[@CapriciousBlackBox]

Me too….I’ve had two Optimix on order for six months now and will consider myself fortunate if I get them within another six months at this point.

[@mntbighker]

@@CapriciousBlackBox I finally have my Beads on the way. What I want most though is a 0-Cntrl.

[@billB101]

Look into the Erica Pico LPG, I have one and love the sound of it. Very Buchla like.

[@mntbighker]

@@billB101 Apparently a Black LPG is also on the way. It shows planned product on Modular Grid. Thanks ;-)

[@mntbighker]

I think most people associate LPG's with percussion. I know I did. So this is an interesting deeper dive into them. Perhaps there are a range of LPG's lumped together, making it harder to understand them?

[@OmriCohen-Music]

Well, I guess it's the vactrol that is pulling people into more percussive uses.

[@chitlun]

Cheers for this man but I’m still a little perplexed by the concept? For example, I would simply patch velocity into the filter to open it up at higher velocity values. What’s the difference between that and the LPG?

[@OmriCohen-Music]

Well, there are a couple of differences. The low pass gate will act as a gate so it will close the sound all the way, similar to how noise gate works but just with a low pass filter (and a VCA usually). Another difference is the vactrol so this natural decay of the sound. To be honest, in VCV it's a bit hard to hear the difference, but if you hear a low pass gate in hardware, you will hear the effect. That said, something like Nurage is really unique, lpg or not.

[@magusinstrumentalis4500]

In addition an LPG typically has a few things that differentiate it: 1. they are usually 2 pole filters, so it's a much softer roll off than many filters 2. It's combined with a VCA, some of the earlier ones did not have separate controls for the VCA and the filter so they always worked together, and 3., as Omri said, the Vactrol, which, when pinged with a short trigger, which produce it's own envelope. That shape/sound is so unique that we actually built a vactrol module so that you could apply it to other filter/VCA combinations for the sound 4. early LPG tended to saturate the sound a bit, you actually hear slightly different harmonics when the filter closes because the saturation is actually post filter. That, for me, is the "secret sauce" of Buchla LPGs. You can hear that in the Verbos A&TC and our Yog-Sothoth module.

[@chitlun]

Cheers folks. Appreciate the explanations… I think I get it now. Also, cheers for the amazing modules Magus Instrumetalis, they’re really something else! Peace n shrooms ✌️ 🍄

[@cardboardmusic]

Who ever said you can never have too many VCAs, got it wrong. I think they meant Low Pass Gates. 😉