Legend turns C64 into a theremin, otherwise known as that weird sci-fi instrument

Everybody just be quiet and look at this for a second. Absolute madman and legend Linus Åkesson has turned a Commodore 64 computer into an actual functioning theremin, and I'm losing my goddamn mind over how cool it is.

To be fair on the excitement, I'm a bit of a theremin fan, and yes we do exist, and hello to any others out there. To everyone else, I welcome you on your journey to enjoying one of the first electronic instruments ever to be invented. If you're after a C64 that games instead of plays wonderous music, check out these prebuilds on offer.

As Linus Åkesson explains in his video, the theremin was invented back in 1920 by Leon Theremin and became widely known as that thing that makes sci-fi noises. This was because it was so unique and wildly alien compared to other sounds of the time. Think of that high pitch alien wobbly sound mimicked in things like the Dr Who intro or and you're on the right track. It quickly became associated with the extraterrestrial and paranormal for films. 

Which is very fair because the theremins themselves are pretty supernatural. You don't even touch them to play and instead they work by generating electromagnetic fields between two antenna points that are then manipulated in the air by the player to change the pitch and volume. It's the ultimate in look mum no hands, of weird sci fi sounds.

Your next upgrade

(Image credit: Future)

Best CPU for gaming: the top chips from Intel and AMD
Best graphics card: your perfect pixel-pusher awaits
Best SSD for gaming: get into the game ahead of the rest

Or it was until it got taken that one step further by being made out of a freaking Commodore 64. Of course this C64 theremin sounds a bit different to the usual open wailing as it's using the C64's lead sound to make noise. Åkesso explains that he used the C64 in conjunction with two 555s, four resistors, a spoon, and a clamp to create this amazing machine. He also includes a complete explanation for how the project works, including a bunch of the interesting science behind it.

His YouTube video above also gives a more in depth explanation, along with a performance of the device playing alongside a piano. Åkesso notes that it's quite difficult to play but also says "Still, it's a very special feeling to hold a tone in front of you in the air."

Sadly, for many of us theremin lovers (DOZENS OF US) the instrument doesn't get nearly enough love or use, especially in modern music. Now that synthesisers are commonplace the creepy tones are simply easier to achieve through other methods, with more precise keyboards and software. GarageBand for example, has a 50's sci-fi alchemy synth keyboard that approximates a theremin nicely, which you can hear in my ambient sci-fi podcast, but no actual direct theremin comparison. Here's hoping someone adds a C64 theremin sound ASAP.

Hope Corrigan
Hardware Writer

Hope’s been writing about games for about a decade, starting out way back when on the Australian Nintendo fan site Vooks.net. Since then, she’s talked far too much about games and tech for publications such as Techlife, Byteside, IGN, and GameSpot. Of course there’s also here at PC Gamer, where she gets to indulge her inner hardware nerd with news and reviews. You can usually find Hope fawning over some art, tech, or likely a wonderful combination of them both and where relevant she’ll share them with you here. When she’s not writing about the amazing creations of others, she’s working on what she hopes will one day be her own. You can find her fictional chill out ambient far future sci-fi radio show/album/listening experience podcast right here. No, she’s not kidding. 

Read more
bulky headphones on black made using x rays
'We essentially created a virtual headset': Scientists transmit inaudible sound using ultrasonic beams to create single person 'audio enclaves'
Various creations in Minecraft, including computers and calculators.
This Minecraft creation blots out the sun for the villagers below, they surely praise it as God, but we know it really to be a functioning 32-bit computer with 2 kB of RAM
A photo of an MSI MEG Vision X AI desktop gaming PC on display at CES 2025
MSI's spangly MEG Vision X AI desktop PC is just the ticket for anyone wanting to recreate that Scotty scene in Star Trek IV
A close-up photo of a monitor displaying the Windows 11 start icon, with the screen's pixels clearly visible
You don't need an RTX 5090 or a 4K monitor for gaming when you can play Snake on your monitor's subpixels. But you will need a microscope or a good macro lens
Orange Pi 5 Plus single board computer
'Is this a practical way to play your Steam games? Nope, not even a little bit.' But getting Steam running on Armbian and a single board computer really is a thing
A pasta "display" on a table showing the word "keep" surrounded by fruit. Obviously.
Penne for your thoughts: This pasta display can show three individual frames and it's trying its best, okay
Latest in Hardware
A woman wearing a VR headset with dramatic, colourful lighting across the background
'World’s smallest LEDs' could lead to accurately lit screens with 127,000 pixels per inch and much more immersive VR
The NES themed 8BitDo Retro mechanical gaming keyboard on a blue background
I love the 8BitDo Retro C64 keyboard but I'd pick its cheaper NES-themed model near its lowest price ever during Amazon's Big Spring Sale
The snazzy red and black HyperX Cloud Alpha wireless headphones float in a teal void. The microphone is attached to the headset.
The best wireless gaming headset is now even better in the Amazon Big Spring Sale, boasting a more than $50 discount
A chip being held up in an Intel fab
Intel is reportedly 'working to finalize commitments from Nvidia' as a foundry partner, suggesting gaming potential for the 18A node
Amazon box
Don't panic! The 'Do Not Send Voice Recordings' option Amazon just removed was only used by 0.03% of customers and they can still have it
Digital generated image of people surrounded by interactive transparent and glowing panels with data. Visualising smart technology, blockchain and artificial intelligence
Now I shall demand the cookies! Proposed new browsing agreement turns the tables and lets users dictate terms to websites
Latest in News
A long bendy arm stealing money from people in a subway car
'You're a very long arm. You steal things. It's a comedy game,' explains developer of comedy game where you steal things with a very long arm
The heroes are attacked by monsters
Pillars of Eternity is getting turn-based combat to mark its 10th anniversary, and that means PC Gamer editors will soon be arguing about combat mechanics again
Image of Ronaldo from Fatal Fury: City of the Wolves trailer
It doesn't really make sense that soccer star Ronaldo is now a Fatal Fury character, but if you follow the money you can see how it happened
Junah beginning a battle in Metaphor: ReFantazio.
Today's RPG fans are 'very sensitive to feeling like they wasted time' when they die, says Metaphor: ReFantazio battle planner—but Atlus still made combat hard anyway
Image of Cersei Lanniser from Game of Thrones: Kingsroad Steam early access trailer
A new Game of Thrones RPG is coming to Steam today with a cast of 'familiar faces,' which is good because it's really the only way to tell it's a GoT game at all
The new Prime Asset featured in the upcoming update for the Outlast Trials.
The Outlast Trials puts its already paranoid players under surveillance for a time-limited story event