Therevox and The Handmaid’s Tale

I listened to hundreds of hours of podcasts in my shop while building the 6th batch of Therevox ET-4’s, from architecture and design, to hacking and linguistics. One of the most interesting podcasts I heard was a complete radio adaptation of “The Handmaid’s Tale” done by Secrets, Crimes & Audiotape and I was fascinated for hours while planing, hand-sanding and finishing all of the wooden enclosures. I didn’t know it at time, but one of the instruments I was working on was for composer Adam Taylor, who was getting ready to score the follow-up season to Hulu’s Emmy Award winning adaptation of the same story.

When Melissa and I were in Los Angeles last year to film Talking Synths, we met up with Adam in Long Beach, where he took us to one of his favourite cafes and then toured his nearby studio. He showed us his ET-4.1 set-up with Space Echo and his newest acquisition, a Roland Jupiter 6 that he found in France – a synthesizer he had dreamed of owning for years. After checking out out all of the interesting art on the walls we spotted a waterphone, a very cool instrument I’ve never seen before. Adam took the waterphone into his main studio and hung it from a ceiling hook, grabbed a nearby violin bow and rubbed it with rosin. As soon as he started eerily bowing the waterphone’s metal rods, Melissa and I both immediately recognized the sound from Adam’s work in “The Handmaid’s Tale”.

Were trying hard to not act like the huge fans of the show that we were. Somewhere in the outskirts of Hollywood a few days earlier we had spotted ads for the upcoming third season of “A Handmaid’s Tale”, something Adam later told us he was working 12 hour days on. One of the bus shelter advertisement boxes was left unlocked and tempted me to reach in and tactfully acquire the print with plans of having Adam autograph it. Thankfully, I had underestimated the size and weight of the poster and it did not accompany us to Long Beach.

Hearing a Therevox being played in movies, television and music has been an amazing reward that is second only to getting to meet our customers face-to-face. If you’d like to learn more about Adam Taylor, check out his interviews with Deadline and Composer Magazine and if you’re into podcasts, he is interviewed on an episode of Mayday: The Handmaid’s Tale Podcast.

iPhone audio input using hacked D.I. Box

If I designed the iphone, I would have included a line-in jack. If you’re a musician that is live streaming video right now and you’re lucky enough to own an iphone that has a headphone jack, here’s a pretty cheap ($20) and easy DIY project that I came up with to turn a DI box and a microphone cord into a device that will let you take stereo line-level audio and feed it directly into your iphone so your live video streams can sound as good as possible.

I built this device last year for Signal Exchange, our Windsor-Detroit synthesizer collective and have used it with my iPhone SE to live stream and capture video of performances. I would have named it something better than “STLN2IPOO” if I knew I would be sharing it publicly, but I’ve been asked a lot about this project and I know a lot of people are wanting to live stream right now – hopefully this will come in handy for some people.

Here is the full size instruction sheet



Open the PDC21, cut the traces shown and test to make sure they are cut with a multimeter if you can. Wire up the resistors and potentiometers, drill a hole in the chassis for the potentiometer. Reassemble and attach knob. For the cable, you can either attach the adafruit 3.5mm TRRS plug onto a regular microphone cable by cutting off the female end and wiring as shown, or you can cut the female end off of a TRRS extension cable and add the XLR Male connector.

how it works

This hack rewires the “input” and “output” 1/4″ jacks of the DI for our stereo inputs, the line-level signal gets summed into a mono signal through the two resistors before going into the potentiometer. The potentiometer acts as an attenuator, so you can turn down a loud signal to avoid clipping. The signal then goes into the DI’s transformer that converts it to microphone level and impedance. The 3k resistor lets the iphone know a microphone is plugged in and our special cable gets the microphone signal and ground to the right pins on the 3.5mm TRRS jack.

using it

Take line-level audio out from a mixer or musical instrument into your STLN2IPOO into one (mono) or two (stereo) 1/4″ inputs and run the mic cord into your iphone. Run the “voice memo” program and start recording to get a visual representation of the signal levels, if it is clipping turn the volume knob down. The DI box’s ground lift switch still functions if you find that you have a ground loop somehow between your gear and phone. That’s it! Now stream some video with good audio!

Ondes Martenot presentation at TSF 2019

Toronto Sound Festival has been one of my favourite events after being asked to display the Therevox ET-4 there in 2018. Held once again in the Polish Combatants Hall, a very beautiful building in downtown Toronto, TSF 2019 did not disappoint with a great concert on Saturday night that involved tape loops stretching across the stage.

I gave a talk in the main hall called “Ondes Martenot and the Pursuit of Musical Expression” where I was able to share some of the insights and research that I have been doing into the life and creative genius of Maurice Martenot, the inventor of the Ondes Martenot.

Almost 100 years ago, Maurice was one of the first people in the world to combine knowledge of electronics and a love of music. After discovering that two radio frequency vacuum tube oscillators could be combined to make a controllable sound, Maurice spent the rest of his life working on the interface between the musician and this new form of sound creation. With feedback from musicians and composers, Maurice Martenot constantly tweaked and revised his electronic instruments to be expressive to physical nuances to continuously control pitch, amplitude and timbre. His vision of an electronic instrument eschewed any attempts at automation that we find common in electronic instruments today. His further inventions of the Metallique and Palme resonator were devices that used physical means to modify the sound of his instrument by adding further complexity and unpredictability that balance the rigid laws of electronics.

Maurice Martenot died in 1980, the same year that I was born. I was first introduced to the Ondes Martenot twenty years ago and I have been pursuing a parallel path ever since. My intention is not to remake what M. Martenot has done, but to preserve the spirit of his inventions as they apply to new sounds and possibilities. I think about him more than I think about any other ghost in my life and when you touch the ring and the intensity keys of the Therevox, you are directly connecting to Maurice Martenot’s vision of how an electronic sound should be controlled and his life-long pursuit of musical expression.

I was joined by Toronto musician and Therevox ET-4.2 owner Joshua Van Tassel who was able to talk about his connection with the instrument and interface. He also brought his Ondea, a modern Ondes Martenot reproduction currently being made in Calgary. Also joining me for the presentation was Patrick McMaster who was down from Montreal to attend and perform at TSF. Patrick is obsessed with the Ondes Martenot and was one of the very first in the world to own a Therevox ET-4. He put together the following video that showcases some recordings of the Ondes Martenot that we weren’t unable to play during TSF because of time constraints.

Thanks to everyone that came out to see us talk about our passion for the Ondes. We received some very positive responses from the talk and hope to expand on it and present it again in the future.

Talking Synths Video Series

Over the last year, we have interviewed Therevox players in their homes and studios. These recording engineers, producers and musicians shared stories about their favourite gear, rare synthesizer finds and talked about how they use some of this gear to sculpt the sounds that they create.

These mini-documentaries jave been edited from over 10 hours of footage and I’m happy to share them here. The time spent with these talented people was awesome, humbling and inspiring.

Joe McGinty gave us a tour of his vintage keyboard collection at Carousel Studio in Brooklyn, New York. Showed us his original MiniMoog, demoed his Oberheim Matrix 12 that he used with The Psychedelic Furs and showed how he controls a Moog Model 15 Modular Synth with his Therevox ET-4.

At Greylock Records, we were met by Ben Talmi and musician Cale Hawkins who improvised an amazing ambient piece on Therevox and Sequential Prophet 6.

Nate Lueck‘s home studio was packed with awesome gear and we loved the sound of his Roli Seaboard and the dark electronic jam he did on his Elektron Analog Rytm MKII using his Therevox ET-4.3 to control a Moog Sub 37 via Midi over USB.

Just across the border in Detroit, Chris Koltay at High Bias Recordings performed a 45 minute ambient piece on Eurorack modules and Therevox ET-4.3 with Earthquaker Devices pedals in the effects loop.

After treating us to some amazing food, Leonardo De Bernardini sat down and discussed his relationship to physical instruments and played us a clip from a film he is currently scoring that uses his Therevox and some of his favourite effects pedals.

At Easter Island Studios, Anton Sanko talked about finding his Sequential Pro-One for $50 in the Village Voice. He demonstrated how he layers his Therevox with stringed instruments after being inspired by the Ondes Martenot in Jonny Greenwood’s soundtrack for “There Will Be Blood”.

Film composer Justin Melland showed us how he combines his Buchla and Oberheim to create evolving drones. He also demonstrated how he uses an overdrive pedal on his Therevox and a very interesting string synthesizer made by Crumar.

All of these videos are available as a playlist on our youtube channel

If you want to show us how you use your Therevox, contact us below!

Sprowt Studios interview with Mike from Therevox

Mark from Sprowt Studios came by the new Therevox Shop to shoot some video and have a chat. The video will be up soon, but in the meantime here is a transcript of the interview:

Mark: Ok, tell us your name, company and how long you’ve been working for.

Mike: My name is Mike Beauchamp from Therevox Custom Musical Instruments. Right now my main instrument is the Therevox ET-4 which there is 3 different models with different levels of features. I describe it as a vintage analog Minimoog meets and Ondes Martenot.

What did you change on this instrument compared to the Ondes Martenot?

I wanted to make this instrument so it never breaks down. In addition to the ring, later versions of the Ondes Martenot also had a keyboard but it was pretty fragile so I left that out and stayed true to Maurice Martenot’s earlier versions of the instrument. Most Therevox customers own keyboards and synths that are a lot more powerful than the Ondes Martenot’s single oscillator sound anyways. The beauty of the Ondes Martenot I believe is in the ring (au ruban) and intensity key (touche d’intensité), they are very expressive and unique. The Ondes Martenot used a fishing string on the ring so I re-engineered this to use a steel-core cable that we have custom manufactured so it will never slip, stretch or break. The Ondes Martenot’s intensity key used a leather bag filled with a powder that had a very limited lifespan, so I redesigned this to eliminate that part and use something that will never wear out. I tried to keep the feeling of the instrument the same but use modern materials and engineering.

Creative people want to use tools that were crafted creatively.

What did you add to the instrument?

Part of the design I did when I was in New Zealand, there’s a bird there called a Tui that has two independent voice boxes. When I was designing this I always wanted it to have two independent voices that you can blend between as a two oscillator synth. I also thought it should have a filter and because your hands connected to the instrument, I brought the filter control out to an expression pedal so you can be controlling that at the same time to. Properly playing a Therevox has your entire body wrapped up; your right hand is controlling pitch, your left hand is controlling the amplitude of two different oscillators and your foot is opening and closing the filter at the same time. It’s very involved, it’s very full-body but you have control of every parameter while you’re playing it. As a synth guy, I also added control voltage (CV) outputs for the ring and intensity keys to hook up to other synths.

What about those big resonator speakers from the Ondes Martenot?

Maurice Martenot was doing a lot of things to create reverberation, hanging large springs in front of big speaker cabinets or hooking speaker motors up to metal gongs and acoustic strings. I wanted to build a reverberation right into the instrument. I’m a big fan of old Fender tube guitar amplifiers and love the spring-reverb units that they use, so I incorporated one of those into all models of the Therevox ET-4.

You obviously put a lot of work into the design and construction of this instrument, can you talk a bit about that?

I’m just trying to make something as well as I can make it. I think people pick up on that. The design was really personal for us and it took a lot of time to get right. When an artist is in their very creative space, it’s a space you have to put yourself into and it’s hard and when you’re there, you’re vulnerable. The tools that you’re given, I think they should have come from a similar space. Do you know what I mean? Creative people want to use tools that were crafted creatively.

What are some of your favourite artists using the Therevox?

I don’t even know where to start, the instrument has been used on a lot of genres and customers are kindly mailing me CD’s to listen to in the shop. “Images Du Future” by Montreal band Suuns is always a favourite of mine, there’s some great deep Therevox bass slides on that album. Most recently, I’ve been listening to Joan Shelley’s new album that has some Therevox played by Wilco’s Jeff Tweedy.