Ask HN: Introduction to Analog Synthesizers (Simulation OK)

166 points by brudgers ↗ HN
I realized I've had a long fascination with analog synthesizers going back to the first one I saw in 1977. The band teacher had one in his office.

And I was tempted toward random knob twisting today when I saw yet another 'analog' synthesizer runnable in the browser.

But I'd really like to have some basic idea of how to put together rudimentary sounds with intent.

I was wondering about book like objects that explain the basics. Maybe a good used book to pick up. Thanks.

129 comments

[ 3.5 ms ] story [ 194 ms ] thread
It depends on whether you're more interested in the theory of how things work or how to make nice sounds (two things that are correlated, but not 100% correlated).

It sounds more like the former; in that case Puckette's book is a classic (and free) http://msp.ucsd.edu/techniques/latest/book.pdf

+1 for Miller Puckette’s book (and Pd) - might be a bit hardcore as an intro. for some, but if you’re technically inclined it’d be a great overview… If the second option is more important, there’s no substitute for messing about starting to get familiar with how different primitive oscillators/filters sound in subtractive synthesis maybe first, then moving on to explore other types from there… (FM for example is less intuitive) …recreating/ researching your favourite sounds from records, synth internals, or just trying to make whatever you’ve dreamt of/heard in your head/twiddling ‘til you find something you like and then trying to work out what makes it sound cool… (‘The Computer Music Tutorial’ is a beast of a book, if you wanted an all-in-one reference: https://mitpress.mit.edu/books/computer-music-tutorial )
The basics of modular synthesis with VCV Rack

https://omricohen-music.com/index.php/2019/09/05/new-to-modu...

This! Omri is amazing. I've been watching his videos since the pandemic started and taught myself modular using VCV from scratch. I even bought a few modules :)

VCV is an amazing tool, seriously amazing. I would have never dove into modular without it as the cost to entry is just too high. VCV also nice because you can play with what you want and just ditch it if you don't like it. Can't say that when you buy a $550 module.

Highly recommend VCV + Omri videos.

(comment deleted)
Syntorial is a little bit expensive, but awesome for showing you how to actually use a synth. It shows you what you need to know as a musician, not as an electrical engineer.

I think it is superior to any book.

It's regularly sold at a 50% discount, so if you aren't in a hurry you can just wait for a deal to come around (though it's that price at adsr currently).
https://www.youtube.com/watch?v=mYk8r3QlNi8&list=PLOunECWxEL...

THis guy is my favorite professor from my school. He has posted online lectures because of COVID and decided to put it up on his youtube channel so people can watch.

back in the day this course had like 25 official seats but like 40 people would show up every day to "unofficially" audit the course.

I saw some lecture videos this guy put up years ago (nearly a decade now), lost the link and couldn't rememeber his name.

Thanks for this

YES! Lanterman's courses are excellent.

I particularly loved how he was able to be vulnerable and admit that, even with a PhD in EE/CS, he had no idea what was happening in most circuits when he started.

Mad props to that. I don't know a lot of PhDs who'd cop to not knowing something.

Wow, thank you so much for posting this. I didn't know it exists and watching the introduction made me want to watch the entire course.
there's a few other "experimental" courses that he teaches like the guitar amplifier/effects course, it's pretty cool. I was a "beta tester" for that course before it went official, shit was pretty wild and fun.
This look amazing! Thanks for sharing, sounds like yarh (yet another rabbit hole) that I wanna pursue! :-)
Looks interesting!

I've been interested in audio. I have no electronics background, so I am overwhelmed by the topic. I find there's a lot I don't understand, and a lot of tutorials online don't quite give me an understanding I'm looking for.

If anyone is looking to be inspired (rather than be informed, necessarily), check out the crazy English guy (is there any other sort?) who runs the channel Look Mum No Computer: https://www.youtube.com/channel/UCafxR2HWJRmMfSdyZXvZMTw

He's got quirky things like a Furby Organ, a 1000 oscillator megadrone, and a cryptocurrency synthesiser. He is also opening a museum soon: The Museum Of Everything Else, dedicated to old music and electronic stuff. It even includes a telephone exchange and his Googol clock, which he plans to never turn off. He also has a flamethrower synth, which he uses indoors. And he has a safety pin for an earring.

Love it.

This may not be the level of detail you are looking for, but I found this short tutorial to be effective at explaining the basics: https://learningsynths.ableton.com/

Ultimately, I think using synthesizers does entail a lot of exploratory knob turning, even if understanding the effect of different components can help guide you to the sound you are looking for.

You really should just buy a synth and play with it. The Elektron Analog 4 can be found cheaply and has a huge breadth of parameters.
^^^ Underrated comment. There really is no substitute here for hands on experience.

I got back into making music during the pandemic, partly as a deliberate choice where I turned my formerly chaotic and cluttered office/music room into something actually usable, but also through watching a lot of YouTube videos, researching, listening, and looking for a synth to buy.

The key is to get something with all physical controls so you get that immediacy of feedback in terms of the sound changing. You can hear the effect of switching between different wave forms, playing with the pulse width, maybe using an LFO to modulate pulse width, applying a filter and so on. Avoid anything that involves menu diving or relies heavily on a touch screen where you're not getting realtime feedback.

Analogue synthesis is super-popular at the moment so bargains are hard to come by - you are not going to get a used Prophet of any era for a couple of hundred quid, and basically forget anything vintage - but you can get some really good synths for not that much money, particular if you go the monosynth route. The Arturia MicroBrute is great, for example. They're about £260 new and I've seen them for £160 - 200 used on Reverb and eBay. If you're happy to spend a bit more, something like the Behringer Deepmind 6 packs a lot of punch for about £400, and the Deepmind 12 is available for around £600. (Behringer had a sketchy reputation for quality but their synth division seems to absolutely nail it - I have a TD-3, which is a clone of the original Roland TB-303, that costs about £100 new as opposed to £3-4000 for an OG 303 on the used market. Sounds spot on. Couldn't be happier.)

I'd also recommend easing yourself into it. One day I'll get into modular (it's inevitable) but I'm not there yet, and it would have been a mistake to start there as it would have been a bit overwhelming for me. You might be different but I'd say get something that, again, gives you results and immediacy - something that you can tinker around and learn and have fun with, and then take that knowledge and use it with other synths.

Sorry, not really a tutorial, but there are plenty on YouTube, which will help, but what you really needs is hands on time with synths, and lots of it. Try programming patches that you've heard on different tracks you like from scratch. For example, I really felt like I was getting somewhere when I managed to program a decently credible Tom Sawyer bass patch with a really dirty vintage-ised filter sweep. It's one of the few events during the last lockdown that brought me some proper joy.

And that's really the final piece of advice: have fun and don't be afraid to experiment. You will probably create some really awful sounds, along with some really interesting ones, but just embrace it all as part of the journey.

I appreciate that because it is the kind of thing I might say.

But I am not that committed. At least yet.

I try to avoid starting by shopping when I can. This seems like one of those. A browser is probably enough to gauge the stickiness of my current interests and avoids figuring about where to put “the damn thing.”

Or to put it another way, I give this kind of interest time. It might have been awesome to have lived circumstances that encouraged my interest of forty five years ago. But I don’t let that put me on a rush.

This is an interesting perspective. I would still argue that you need the hands on experience, and I cannot emphasise the immediacy and satisfaction of using physical controls enough.

In my other comment I suggested that you won't find a bargain in vintage gear. That's true. However, if you don't want to be financially committed, you might do well do buy a vintage synth because you should get your money back - or maybe more - if you decide you're not that interested after all and want to sell it. Whereas with a new piece of gear, it will depreciate.

As I say, the market for these things is pretty hot now. I'm weeping that I didn't pick more gear up 10 or 15 years ago before it all became so popular. Of course, I didn't have any spare cash back then so there's that.

I suppose you could argue so. But I am not arguing. I know myself well enough to know what makes sense for me.

It’s not the spending money.

It’s that spending money can seem like progress. But not really. At least not at first. Doing the thing is progress and I can spend what time I spend that way without product research and bargain hunting and shipping and unboxing and making room for another hobby object.

And accessories.

If I find myself at the point where buying something is progress, then that’s the time, but that is statistically less likely.

I would second this general idea, but I don‘t know about the Analog 4 specifically? Out of all the analog synths it is the most like a little computer. It‘s awesome but doesn‘t feel like a learning tool. There are a lot of synths that kind of have the signal flow laid out on the front panel, like a Korg Monologue. That seems helpful.
I know $900-$1500 is "cheap" for most of the HN crowd, but for the rest of us there's hardware synth options that are much cheaper! For example, the Korg Volca Keys [1] is a perfectly suitably synth to learn the basics of analog synthesis and can make some nice sounds to boot. YOu can get it for $150 new or even less used. (And of course, there's plenty of free software synths, as others have linked in other posts here). [1] https://www.korg.com/us/products/dj/volca_keys/
The Analog Four has a huge range but I don’t think it’s particularly beginner friendly due to the large array of parameters accessed by just 10 knobs. Its flexibility also means it has fewer “sweet spots” than simpler synths - it’s not as easy to make something that sounds great by messing with a few knobs compared to e.g. the Roland SH01A.

I think for a beginner it’s more helpful to have as many controls as possible accessible hands on, rather than having to go to different pages and have different knobs do different things depending on context.

Analog Four is awesome as you get more experienced though as you can create a whole track on it if you are creative!

I’d personally probably go for a Korg Minilogue as a beginner these days…

There are a bunch of different ways that one could approach this, depending on if you want to learn to play a synth vs. understand synthesis (which obviously have some overlap).

Neither of the books that I'll recommend here are specifically about learning to play analog synths, but they both give a bunch of background to understanding analog and digital synthesis:

I read an earlier edition of this when I was getting into working in electronic music, and found the background very useful and a pleasure to read.

https://www.amazon.com/Electronic-Experimental-Music-Thom-Ho...

This one is specifically not about analog synthesis (but rather digital synthesis and sound processing), but is kind of a classic in the field:

https://mitpress.mit.edu/books/computer-music-tutorial

The most common physical analog synths have two to three oscillators and a resonating filter. The first book would give you enough info to know what that means and begin to explore the space a little more intelligently.

Assuming you're a programmer, you can also do a lot of things by creating synths using either a visual or code-based synths on your own. I'm partial to ChucK, but there's also Supercolider, CSound, Max, Pd, Reaktor, ...

Andrew Huang has a really good intro video on modular synthesis: https://www.youtube.com/watch?v=cWslSTTkiFU

Warning that modular synths are typically not cheap. However, most of the physical standalone synths that exist today use the same principles.

Physical hardware can be really fun if you don't end up going with VCV rack or syntorial as mentioned in this thread.

Good pieces of hardware for a n00b:

- arturia microfreak

- korg minilogue

- any of the korg volca lines

The Moog Grandmother is an extremely easy analog synth - my kids know how to use it
Even though its about webaudio, webaudio uses virtual analog so this book isn't just great for learning webaudio but great for learning the details of analog subtractive synthesis in the browser. https://webaudioapi.com/book/
I highly recommend Syntorial: https://www.syntorial.com/
I second the Syntorial recommendation. You can get a number of lessons as a free introduction and it’s a very hands on approach that allows you to “get your hands dirty” as others have suggested.
A thousand times yes. You can read all the tutorials you want, but the ear training that Syntorial offers is really worth it.

Getting "the sound in your head" coming out of the machine takes lots of practice, but this really, really gives you a running start.

https://www.youtube.com/c/MoritzKlein0

This guy has a channel where he builds up analog synths from basic components. He does a great job explaining the intuition.

Seconding this recommendation. As long as you have a basic understanding of electric components he's really easy to follow and does a great job of explaining how the circuits work.
This is an odd one and is a bit of an acquired taste, but some sound designers swear by the original 1971 manual for the ARP 2600, of which you can find a PDF here: http://guitarfool.com/ARP2600/Arp%202600%20Owners%20Manual.p...

If you want to follow along with your own synthesizer, there's a breadth of options ranging from software recreations of the 2600 to a licensed hardware reissue, but for $25 you can get Cherry Audio's respected CA2600: https://cherryaudio.com/instruments/ca2600

I had an Omni 2 that almost set my apartment on fire (the synth itself was lost), it's not such a collectors item today as the 2600 but beware when buying/restoring this old equipment that some of the parts are well over their predicted life span and that can cause trouble. I tracked the start of the fire down to a tantalum cap, and recreating the conditions that it was under fairly reliably caused these to burst into flame.

So if you go the route of buying a broken one and restoring it make sure you refresh all of the caps that are across the voltage rails (of which there are quite a few).

- Buy a Korg MS-20 (or anything, ideally pure analog)

- Learn some music theory

- Learn some signal / information theory

- Synthesize!

I am not sure why they use the word 'analog'. If it is in a browser it definitely isn't, it is digital, though the one you saw in 1970 probably was analog. In operation though the difference is subtle, like a real piano vs a digital one.

There is a lot of science behind audio and if you are that way inclined, learning about it is really worthwhile. All those effects create the sound they do for a reason.

Thanks for the clarification.

I know that there is a semantic difference in technical contexts. It doesn’t bother me. It’s a true-enough Scotsman.

The distinction for me is with sampling synths (which can also, though rarely be analog)…I mean I have a forty plus year passing interest and the personality to gravitate to HN.

I am more interested in the empirical part. And digital has some practical advantages like using my iPhone.

Generally it means they're simulating analog synth components in software; i.e. starting with oscillators producing stuff like triangle or sawtooth waveforms, running it through high pass and low pass filters and an amplitude envelope, throwing in some low-frequency oscillators controlling various parameters, adding some effects like reverb at the end.

That way you're doing the same stuff you would in a pure analog synth, and getting similar sounds. In the digital realm there are lots of other ways to make sounds: FM, additive, samples, physical modeling, etc.

Pure analog synth hardware had fallen out of favor by the turn of the century but since then it's made a comeback.

Ableton's guide and Syntorial, both mentioned elsewhere here, are great introductions. Subtractive synthesis (which is the style of synthesizer your probably have in mind implicitly when you say "analog") is fairly straightforward in practice and decomposes into separately understandable components really well. It's a good fit for programmer brains that think in terms of composing smaller units together. It's literally just oscillators, envelopes, filters, and LFOs. Everything else is secondary.

Once you get the basics down, when it comes to real sound design I've found the best tool is to get on YouTube and search for "<name> sound design" where <name> is the kind of sound you want to make: spacey pads, EDM pluck, dub techno stab, 90s synth bass, etc.

Over time, your ear will get better at hearing a sound and understanding how to build it in a synth. You'll learn to hear the difference between a sawtooth and square, what different filters sound like, and how detuning, unison, PWM, etc. all affect a sound. Tutorials are a good way to build up that knowledge.

Also, just like programming, there is absolutely no substitute for just sitting down and noodling with it yourself and trying to make sounds. Like cooking, much of the learning happens in the intuitive non-verbal part of your brain. You don't just need to learn the words for things, you need to develop a deep auditory intuition around sound. You need to feel it. Books will only get you so far with this. Making sounds yourself is key.

You can do this all on a computer using software synths if you want. You can get a free or cheap DAW like Reaper or Ableton Lite and then a free soft synth like Tytel's Helm.

But, personally, I think it's more fun and easier to learn on hardware. That lets you engage your sense of touch and muscle memory, which helps really lock in the learning. The Korg Monologue is a great analog subtractive synth to start with, or a Minilogue if you want to play chords. Hardware holds its value really well, so you can always sell it and recoup most of your investment if you lose interest.

Note that subtractive synthesis is just one way that machines can make sound (but it happens to be one of my favorites). Over time, you'll want to explore FM, wavetable, additive, granular, etc. There's a ton of fun to have.