The Sound of the Machines
Super Famicom / SNES
スーパーファミコン
Eight voices, 64 kilobytes, and a chip designed in secret.
Sony SPC700 8 channels · Nintendo + Sony · 1990
The Chip
The Super Famicom's approach to sound was fundamentally different from its predecessor. The Famicom generated tones from scratch — pulse waves and noise, mathematically produced. The Super Famicom took a different path: it played back recordings.
The Sony SPC700 was a sample-based chip. Instead of generating tones, it held compressed audio recordings of real instruments — a piano key, a string section, a trumpet — and played them back at different speeds to produce different pitches. Eight channels at once, each playing its own recording. The result, at its best, was something no Famicom could produce: music that sounded almost like a small orchestra.
But the chip came with a severe constraint on this ambition. All of those instrument recordings — every sample that would play in the entire game — had to fit inside 64 kilobytes of dedicated memory. That is a tiny amount. For comparison, a single uncompressed one-second sound recording at reasonable quality takes up several hundred kilobytes. Composers got 64KB for an entire soundtrack.
The chip used a compression format called BRR — Bit Rate Reduction — to squeeze audio down to roughly a quarter of its original size. Still, the budget was tight. Every instrument choice was also a budget decision. Want real-sounding brass? That costs kilobytes. Want lush strings? You may need to cut the piano. And if you wanted to use the chip's built-in echo effect to add warmth and space — which you did, because it sounded beautiful — the echo buffer ate into the same 64KB. More reverb meant fewer instruments.
Composing for the SPC700 was not just a musical challenge. It was an exercise in constrained resource management, where the decisions you made about memory shaped the sound of the music itself.
Channel reference (technical)
Tomita's Track
The Forbidden Challenge
禁断の挑戦
What to listen for
This piece builds in six layers — piano, then strings, then harp, then brass, then bass and high strings together — and each new layer enters only when the music has earned it. Listen for bar 8, when the brass arrives for the first time. Everything before that moment is held back deliberately, building toward that single point. Also notice the echo: it wraps around every note, but it is not decoration. Tomita used it as a seventh instrument, the one that fills the space between the others.
Every instrument on a Super Famicom had to fit inside 64 kilobytes of memory — less than a single photo on your phone. The SPC700 also has a built-in echo that eats into that same memory. I used the echo as my seventh instrument: without it, this piece loses half its depth. The trade-off — more echo delay means fewer instrument samples — was not a technical problem. It was the compositional decision.
The real story this piece is built on
SFC-1: Ken Kutaragi designed the SPC700 chip largely in secret; his supervisors were furious when they discovered it. The work led him to create the PlayStation in 1994.
How this piece was made
When I learned the story behind this chip, I knew immediately it had to become music. The engineer who designed the SPC700 did it in secret — his supervisors were furious when they found out. But someone above them said: this is good work. And the music that came out of that chip changed games forever. The engineer's name was Ken Kutaragi. He later created the PlayStation. I composed this piece to hold that feeling — starting alone, in quiet. The opening is a single piano, small and uncertain. At bar 8, the brass enter. Everything that had been building in silence — strings, harp, bass — comes together in one moment. That is what stepping past the forbidden threshold sounds like. The SPC700's BRR compression rounds the edges of every sound, making them slightly warmer than they should be. That gentle imperfection is not a flaw. It is the character of this machine.
Techniques used in this track
- SPC700 BRR ADPCM sample synthesis — sine-wave piano and string approximations compressed to fit in 64KB
- Three-layer string detuning at ±2 cents — just enough warmth to feel alive, not enough to sound out of tune
- Brass voices entering only at bar 8–11 — the single moment of breakthrough, held back to earn its impact
- Six-layer dynamic build: piano → strings → harp → brass → pizzicato bass + high strings
- 24-bar six-part structure: A (question) → B (resolve) → C (release) → D (rest) → E (trust) → F (certainty)
- SPC700 built-in echo (delay = 8th note, wet = 0.28) used as a seventh instrument, not decoration
- Voice stacking as narrative: each new layer represents one step past the threshold
Three things about the Sony SPC700
The Super Famicom's sound was technically far more sophisticated than the Famicom's. But the SPC700 traded one kind of constraint for another. Instead of the Famicom's hard limit on voices and waveform types, the Super Famicom gave you flexibility — and then charged you for every byte of it. Here is what that actually felt like from inside the music.
Every instrument you hear had to fit inside 64 kilobytes — less than a single photo.
The SPC700 came with its own dedicated block of memory: 64 kilobytes, separate from the main console's RAM, reserved entirely for audio. Every instrument sound in a game — the piano, the strings, the brass, the percussion — had to be compressed and loaded into that 64KB space before a note could play. A modern smartphone stores a single photograph in more space than an entire Super Famicom soundtrack had to work with. Composers used a compression format called BRR that squeezed audio down to roughly a quarter of its original size. Learning to choose which instrument recordings were worth the precious bytes — and which had to be cut — was as much a part of the job as choosing which notes to play.
The echo effect was beautiful — and it ate into your instrument budget.
The SPC700 had a built-in echo processor that could make music feel spacious, warm, and larger than life. That echo is a large part of what gives Super Famicom music its characteristic lushness. But there was a cost. The echo effect needed its own buffer in RAM to store its reverb tail. The longer you wanted the echo delay — the more time the sound hung in the air before fading — the more of your 64KB it consumed. Every millisecond of beauty had a price in kilobytes. Composers who wanted a long, cathedral-like reverb had to cut instruments to afford it. The warmth you hear in so much Super Famicom music is partly the sound of that trade-off being made — and made well.
The chip was designed in secret. Its creator went on to build the PlayStation.
The SPC700 was designed by Ken Kutaragi, a Sony engineer who had watched his young daughter playing Famicom one afternoon and become convinced that interactive entertainment was where technology was heading. Working largely on his own initiative — without formal approval from his supervisors, who were initially furious when they discovered the project — he designed the chip that would become the heart of Super Famicom audio. Someone above his supervisors recognized what he had built and approved it. The SPC700 went into production, and the games it powered changed what people expected music in games to sound like. Kutaragi continued working on game hardware. In 1994, that path ended at the launch of the original PlayStation.
The sound of a beautiful side effect
BRR compression does something that its designers did not specifically intend. When audio is compressed down to fit in 64KB, the high frequencies round off. The sharpness at the top of the sound — the edge that makes recordings feel clinical and precise — softens. What is left is warmer, slightly thicker, less exact.
That softening is not a feature. It is a side effect of compression. It happens because the chip did not have enough memory to be faithful to the original sound. But the result — the characteristic warmth that people associate with Super Famicom music — is inseparable from that imperfection. Take away the compression and the music would sound cleaner. It would also sound less like itself.
The SPC700 was designed in secret by an engineer who was reprimanded for the work and went on to help create the PlayStation. The chip he built in defiance produced music that people still seek out thirty years later. Constraints, even the ones imposed by disobedience and limited budgets, have a way of becoming gifts.
The warmth you hear in Super Famicom music is the sound of compression. Not a design choice. A side effect. One of the most beautiful side effects in the history of audio.
Explore further
Want to hear this chip on original hardware? Browse our tested Super Famicom collection →