Jonathan Tollefson

design engineer · audio & real-time web

builds

Work

program

Intake

I talk to my watch. It comes back as a calendar event, an organized idea, or a prompt for Claude.

tap to stop

One memo, 0:31, spoken into the watch from the couch. Five things happened on the calendar; two are shown.

transcript
verdict
executesurfacestore
ticket
{ kind: "calendar_event", items: 2, title: "Cancel: Jay and Anisa's wedding" }
{ kind: "calendar_event", items: 1, title: "Sam's birthday party, Saint Paul" }
deck
Mar 5–7, 2027 CALENDAR_EVENT

Cancel: Jay and Anisa's wedding

  • Fri Mar 5, 2 PM → Sun Mar 7, 3 PM
  • exactly one match · a copy kept · deleted
done by itself · Uptown 51
Mar 5–7, 2027 CALENDAR_EVENT

Sam's birthday party, Saint Paul

  • Sat Mar 6 · 8:00 PM
done by itself · Uptown 51

My best ideas never survived the walk to the computer.

I'm not going to the wedding on the weekend of March 5th anymore, so take that off my calendar. Instead, that Friday I'm going to dinner at six, Saturday morning yoga at nine, Saturday night Sam's birthday party in Saint Paul at eight, and Sunday afternoon a thrift run with friends around one.

said to Siri
Siri's reply, on an iPhone: There's nothing called “no longer going to the wedding” on your calendar.
said to the watch
The calendar before: Jay and Anisa's wedding filling Friday March 5 through Sunday March 7, 2027. The calendar after: the wedding gone; Dinner Friday at 6 PM, Yoga Saturday at 9 AM, Sam's birthday Saturday at 8 PM, a thrift run Sunday at 1 PM.

The wedding left. Four things arrived. Nothing else was touched.

under the hood

the wrist 0:31 the Mac picks it up up to 15 min heard 10 s decided five things written 29 s done
  1. the wrist0:31
  2. the Mac picks it upup to 15 min
  3. heard10 s
  4. decidedfive things
  5. written29 s
  6. done

It takes an event off the calendar only when exactly one matches what you said, and it keeps a copy first. Two matches, or none, and it waits in the queue for you.

app

AudioDex

An app that reads every recording I've made, names each one by what's inside it, and makes them searchable the way photos are.

Years of my life, trapped in files named "New Recording."

A camera takes you out of the moment. A voice memo doesn't.

  1. heard“That's probably like C-flat.”
  2. measuredA3
  3. namedThanksgiving
  4. drawn
  5. linkedThe tape it became: Thanksgiving A Capella

Every recording I own lands here first: songs, drafts, memos, the files no service holds. Intake and the Studio read from this.

instrument

SIGNAL

Your first song is in your downloads. Pick a key: you can't play a wrong note, and neither can the bass. Space brings the drums, B brings the bass, and it was recording the whole time.

Find the tempo and key of a song you love, set them, and play along with a band that follows you. The export button saves the take as a WAV. The full studio is one sheet down.

DRUMS KEYS BASS

how to play

How to play SIGNAL from a computer keyboard A US keyboard. A, S, D, F, G, H, J, K and L play the notes of the scale; W, E, T, Y, U and O are the black keys between them; R and I play nothing. Space turns the drums on and off. B turns the bass on and off. Hold Z for the gate and hold M for the dive. The left and right arrows move the notes an octave; the up and down arrows change the sound of the notes through rhodes, piano, pad and lead. The equals key taps the tempo. Escape stops everything. The keys answer once the red power switch is on. RIASDFGHJKL↑←↓→WETYUOspaceB=ZMesc notes stop everythingtap tempogate (hold)bass on/offdive (hold)↑ ↓ sound of the notesdrums on/off← → octave
  • A–L · W E T Y U O notes
  • space drums on/off
  • B bass on/off
  • Z gate (hold)
  • M dive (hold)
  • ← → octave
  • ↑ ↓ sound of the notes
  • = tap tempo
  • esc stop everything

under the hood

Drums and bass are booked 120 ms ahead on the audio clock, and the beat held for 20 seconds at a 4× CPU throttle without a dropout. Everything leaves through a limiter, so nothing clips.

where it came from

Its engine comes from a larger instrument I built to make music at home.

The keys play recordings of my own synths, sampled every three semitones with a tool I wrote.

suite

Signal Studio

SIGNAL on steroids: a whole studio that opens like a notebook and goes where I go.

Three engines that resample anything. The shorthand is drums, keys and bass, because that's a keyboard player's whole band.

Every engine's effects are on the surface at once. I can see which one has the delay and which has the sidechain without opening anything. Ableton makes you expand a rack and pop a window for that.

It was already listening. There's no record button to forget. A take is cut out afterwards.

Any sound on the laptop, cropped in two moves, becomes a key: re-pitched, re-timed, remixed.

Built in New York, jamming with a friend who won't stay in one key. One click and the room's chord, scale and tempo are on the screen. Join without interrupting him.

A laptop, a MIDI keyboard, a travel keyboard, a PlayStation controller: writing utensils. The same moves on every one, every time.

The three engines side by side: HOUSE on the drums, SYNTH on the keys, 303 on the bass, each with its own filter, pattern and effects.
The same three towers with everything dimmed except each engine's effects: drive, mod, delay and reverb on the drums, the keys and the bass at once.
The jam page's record: a waveform of everything played, with four bars selected between two handles.
The well under the keyboard holding three chips, RHODES, VOICE and RADIO, each with its waveform and its length in bars.
The glass at the top reading 94 BPM and the key C minor, both in the radar's coral ink.
The keyboard at the foot of the studio with the laptop's letter keys printed on the keys from A to L.
01 / 06
$3,000 of instruments in the bedroom. A laptop on the plane. Every synth I own, sampled into keys once. The room travels.
Your friend won't stay in one key. The radar names the chord, the scale and the tempo. Play along, no math.
The laptop's in the other room and you're looking out the window. The controller sits on the keyboard: voices, drums in, drums out.

Making music was never the hard part.

Ableton is for producing ideas that already happened. This is for making the idea exist.

Make ten thousand songs. Keep ten.

Look

hot pink wave gradient
Cali Procreate on iPad · 2022
the seawall at dusk, VAN on the cliff, a cyclist walking under a comet and a sky of stars
van Procreate on iPad · 2026
a bright blue iris around a black pupil
i c u Procreate on iPad · 2022
Interstellar — black and silver liquid marble
Interstellar Procreate on iPad · 2021
Interstellar B-Side — black and white topographic waves
Interstellar B-Side Procreate on iPad · 2025
Squinting at a sun-soaked lake
Hazy Droplets Procreate on iPad · 2025
lime and white wave texture
Lime Waves Procreate on iPad · 2022
Zeans — zipper wordmark in orange and teal
Zeans Procreate on iPad · 2025
Blizzard — blue-violet marbled swirls
Blizzard Procreate on iPad · 2023
magenta and cyan zigzag streaks on black
ZZZ Procreate on iPad · 2022
marbled glitch abstraction in greens and violets
Trippy Granite Procreate on iPad · 2021
psychedelic masked figure in orange
Tolo Facemask Procreate on iPad · 2025
pink, cyan and violet marbled waves
Cudi Procreate on iPad · 2022
scanline abstraction in pink
Telly Procreate on iPad · 2021
wavy orange, teal, and violet pattern
70s Procreate on iPad · 2021
01 / 15

Listen

Stroll to the Charles

A field recording in Cambridge Massachusetts walking from my dorm room to the Charles River. But I remixed it a little.

0:00 / 3:27

Thanksgiving A Capella

A voice memo from a Thanksgiving dinner I couldn't attend. After the door slam, every sound is cut from that memo. The lead is my sister's one nasal note.

0:00 / 1:06

Aliens Made This

A NASA intern illegally published this transmission intercepted from deep space.

0:00 / 0:50

Tops (+Tolo)

A track I made with one of the Lakerboys (LB2).

0:00 / 3:02
01 / 05
résumé