Technical analysis of the SID techniques that made these pieces exceptional.
Click Play on any entry to hear it in the persistent player bar.
Commando
1985 · Elite Systems · C64 ·
Commando is where Rob Hubbard announced himself to the world.
The title theme opens with a militaristic snare roll achieved via a noise-waveform
channel with rapid ADSR cycling, before launching into a march that demonstrates
Hubbard's formal training in a way no previous C64 composer had managed.
All five flagship compositions are playable in the Music catalogue.
SID techniques used: The melody voice uses a pulse waveform with
pulse-width modulation sweeping between approximately 800 and 1200 (hex) to produce
the characteristic bright, choir-like tone. The bass line employs a triangle wave for
warmth. The filter is used aggressively - low-pass with cutoff swept via the SID's
internal CutFreq register on the off-beat to create a rhythmic pump effect heard under
the brass stabs.
The in-game music uses the same voice configuration but at a faster tempo with shorter
ADSR release times, creating an urgency that matches the on-screen action. Hubbard
noted in interviews that the march structure was deliberate - the game's military theme
demanded something with a formal, European feel rather than the funk or jazz that was
common in US-influenced C64 composition.
Sanxion
1986 · Thalamus · C64 ·
The Sanxion Loader is arguably the most celebrated single SID
composition ever written. During the 30-40 seconds it takes to load the game from
cassette, Hubbard delivers a piece of orchestral scope that defies the hardware's
technical constraints: a dramatic build from silence, through swelling strings (achieved
via detuned, phase-offset pulse voices), to a triumphant brass theme.
SID techniques used: The strings are produced by layering all three
SID voices in unison at slightly different pitch registers - a technique called
"detune stacking." The filter is set to band-pass mode during the string passage and
swept to low-pass as the brass theme enters, creating the illusion of a crescendo.
Hubbard uses ring modulation briefly during the transition - the SID's ring-mod
capability produces a clangorous metallic overtone that emphasises the dramatic climax.
The title music (subtune 2) is equally impressive - a fast, complex melody with
Baroque-influenced voice leading that showcases the SID's ability to produce
perceptually independent voices even when all three channels are active.
SID techniques used: The piece is built on a walking bassline in the
sawtooth voice - a waveform that the SID produces naturally and that Hubbard exploits
for its natural guitar-like attack. The melody uses vibrato via rapid pitch LFO cycling
within the interrupt handler, a common technique of the era but executed here with
exceptional subtlety. The harmony voice drops in and out across the arrangement,
creating moments of tonal space that give the piece its emotional weight.
Knucklebusters
1987 · Mastertronic · C64 ·
Knucklebusters is often cited as the most technically demanding piece
in Hubbard's C64 output. The title theme uses all three SID voices at near-maximum
complexity simultaneously: a rapid arpeggiated chord pattern in voice 1, a moving
bass line in voice 2, and a sustained melody with filter automation in voice 3.
SID techniques used: The chord arpeggiation (playing the notes of a
chord in rapid succession to imply full harmony) is a staple of C64 composition, but
Hubbard's implementation here is unusually fast and musically logical - the pattern
implies jazz-influenced chord extensions rather than simple triads. The filter sweeps
on this piece are some of the most dramatic in his catalogue: a high-pass sweep from
full to closed over four bars that strips the texture down to just the bass, then
releases abruptly for maximum impact on the theme re-entry.
Delta
1987 · Thalamus · C64 ·
Delta closes Hubbard's most productive period with one of his most
musically sophisticated compositions. The title theme is built on a repeating harmonic
cycle that would not be out of place in a prog-rock arrangement - unusual time signature
phrasing, complex inner voice movement, and a dynamic arc across its full length that
suggests deliberate large-scale formal planning.
SID techniques used: Delta makes extensive use of the SID's sync
modulation - synchronising one oscillator to another to create a forced timbre
change - to produce a distinctive distorted-lead sound on the melody voice.
The bass employs a triangle waveform for warmth rather than the sawtooth common
in his earlier work, giving the piece a rounder, more contemplative quality.
The in-game theme (subtune 2) is a separate, complete composition - rather than a
simplified version of the title - that reinforces Delta's reputation as one of the
most fully realised soundtracks of the C64 era.