Martin Galway and the C64 Sound

The first thing a Commodore 64 game did to me was make me wait. A cassette took four or five minutes to load, and Ocean Software worked out that a captive audience staring at a loading screen is the most attentive audience a composer will ever get. So they put music on the loader. You pressed play on the tape deck, the screen filled with colour bars, and a tune started that had nothing to do with the game and did not stop until the game was ready.

Martin Galway wrote music for that loader. Think about the brief for a second: compose something that has to survive being heard for five minutes by a bored eleven-year-old, on a chip with three voices, while the same processor is decoding a bitstream off a tape motor. He wrote it anyway. That instinct — treat the constraint as the commission — is the whole career.

The machine he was handed

The SID chip, formally the MOS Technology 6581, was designed by Bob Yannes and put into production in 1982. Yannes wanted a proper synthesiser rather than a bleeper, and he built one: three oscillators, four waveforms per voice, a full ADSR envelope on each, ring modulation, oscillator sync, and a multi-mode filter. That specification was absurd for a home computer in 1982. Yannes left Commodore and co-founded Ensoniq, which tells you where his head was.

There were catches. There is one filter, shared across all three voices, so filtering a bassline filters everything you route through it. The 6581’s filter cutoff drifted badly between individual chips because of manufacturing tolerances, which means a tune balanced on the composer’s machine could arrive on yours sounding thin or muddy through no fault of anybody’s. And three voices is three voices. A bass, a lead and a drum leaves nothing for harmony. Every SID composer of the era spent their life negotiating that arithmetic.

The other structural fact is timing. C64 music runs off the raster interrupt, which on the PAL machines sold across Europe fires fifty times a second. Fifty ticks is your entire clock resolution. Every arpeggio, every vibrato, every drum hit is quantised to a fiftieth of a second, and the sound of European C64 music — that fast, gritty shimmer — is partly the sound of composers writing against a 50Hz grid. I lay out how that grid shapes the whole idiom in the SID chip and music as system.

Ocean, and the job

Galway was born in Belfast in 1966 and was working for Ocean in Manchester before he was twenty. Ocean’s business was licences and arcade conversions, produced fast, and the job was to deliver a soundtrack for whatever came through the door that month.

What came through the door was Konami. Mikie, Yie Ar Kung-Fu and Hyper Sports arrived in 1985 on Ocean’s Imagine label, Green Beret, Comic Bakery, Street Hawk and Terra Cresta in 1986. Sylvester Stallone came through the door too: Rambo: First Blood Part II in 1985, where Galway had to render Jerry Goldsmith’s orchestral score onto three oscillators. Then two Sensible Software games, Parallax in 1986 and Wizball in 1987, and Taito’s Arkanoid in 1987.

The interesting thing about that list is how little of it should have produced anything memorable. Comic Bakery is a mediocre conversion of a mediocre Konami cabinet about a baker and some raccoons. Galway’s tune for it is one of the most recognisable pieces of music the machine ever produced, and it is entirely his own — it bears no relation to what the arcade board played. Forty years on, the tune is the reason anyone says the game’s name out loud. A staff composer at a licence factory quietly wrote a piece of music that outlived its host, and then did it again the following year.

The conversion problem nobody credits

There is a technical job hidden inside “arcade conversion” that the box never mentions. A mid-eighties Konami cabinet had dedicated sound hardware and more of it than a home computer could dream of, and the conversion composer’s task was to take music written for that board and land it on three oscillators, in a few weeks, for a fee.

That is a translation problem with no correct answer. You cannot reproduce the arrangement, so you must decide what the piece actually is. Galway’s Rambo is the clearest specimen: Jerry Goldsmith’s score is orchestral, built out of texture and mass, and none of that survives contact with a SID chip. What Galway kept was the harmonic motion and the shape of the theme, and what he threw away was everything that made it sound like an orchestra. The result reads as Goldsmith to anyone who knows the film and reads as a C64 tune to anyone who knows the machine, which is the only outcome that could have worked.

Do that eight times a year on deadline and you either develop a theory of what music is made of or you produce eight pieces of rubbish.

The techniques were the composition

Here is where Galway separates from the pack, and why he belongs in a career piece rather than a playlist.

Three voices means a drum kit costs you a third of your polyphony. The SID has a noise waveform, which is the obvious place to get percussion from, and it sounds like a hiss. Galway’s answer was to take a pulse waveform and cycle a table of frequency values at interrupt speed until the oscillator stops reading as a pitch and starts reading as a hit — a metallic, tuned crack with far more character than the noise generator gives you. The technique is called Galway noise. It is named after him because he is the one who made everybody want it.

Then there is the sample trick. The SID has a four-bit master volume register. Writing to it produces an audible click, which is a well-known defect. Galway is generally credited with the first commercial use of the obvious perverse consequence: click it fast enough, with the right values, and the defect becomes a four-bit digital-to-analogue converter. Arkanoid has sampled drums in 1987, on a machine with no sample hardware, because somebody looked at a bug in the volume control and heard a snare in it.

That is the pattern in everything he did. The chip’s specified features are the front door. Galway kept going round the back.

The tunes that argue

Wizball is the one I would put in front of a sceptic. The game is a Sensible Software oddity about a bouncing ball restoring colour to a drained world, and Galway’s score for it moves between moods with a confidence that has no business existing in 1987 — it is structured like a piece of music rather than a loop with a length. Parallax runs long and takes its time getting where it is going, which on a machine where most tunes lasted ninety seconds was a statement about ambition.

And Times of Lore, written for Origin in 1988, is the argument’s closing paragraph: a piece long and melodically developed enough that it functions as a small overture, on hardware most of the industry had already written off as a toy.

Set that against the other giant of the era. Rob Hubbard’s work — Delta, Monty on the Run — is fast, driving and structurally restless, music that behaves like a demo of what the machine can do. Galway’s writing is warmer and more patient, more interested in a melody that survives being hummed. Both men were solving the same three-voice problem. Hubbard solved it with motion, Galway with tone. I have written about Hubbard’s peculiar celebrity separately in the SID composer as star, and the contrast between the two of them is most of what the SID era’s aesthetic is made of.

What happened after the breadbin

Galway went to Origin Systems in Austin in 1988 and stayed in American development, moving out of composition and towards audio direction as budgets and teams grew past the point where one person wrote all the sound. He is now director of audio at Cloud Imperium Games, working on Star Citizen — a project with an audio budget that would have funded Ocean’s entire 1986 output several times over.

I find that trajectory more instructive than sad. The skill that made Galway good at the SID chip was never really melody. It was a systems reading of a piece of hardware: understanding what a chip actually does at the register level, then finding the gap between what it does and what its designer thought it did. That skill scales. It is the same skill that makes a good audio director, which is why the ones who were good at 1986 tend to still be working.

Why the constraint keeps getting misremembered

The nostalgia industry around this music has settled on a comfortable story: limitations breed creativity, less is more, the old ways were purer. That story is wrong in a specific and checkable way, and I go after it properly in chiptune nostalgia and the real technical constraint.

The short version: the SID chip’s limits produced Galway’s best work and also produced thousands of hours of unlistenable rubbish, on the same hardware, in the same years, under the same constraints. The constraint is a filter, and filters do not compose. What Galway had was a specific and unusual combination — a musician’s ear plus an engineer’s willingness to read the data sheet as a list of things somebody else failed to prevent. The limitation did not make him good. It made his goodness legible, because when everyone is issued the same three oscillators you can hear exactly who understood them.

That is why his tunes survive on emulators, where the constraint has evaporated. Nobody has to use three voices any more. The music is still good, which means the three voices were never the point. Half of what I would defend from the machine’s library is on that list somewhere — the C64 canon is full of games whose soundtracks are doing more work than their code.

Put on the Wizball score with no context and no fondness for a beige plastic wedge, and it holds. Forty years is a long enough run to stop calling it nostalgia.