Synthwave and 8-Bit Music for Videos: What Makes the Sound and How to Make It
The ingredients of synthwave and chiptune, gated reverb, and how to make retro cues, coin pickups and level-up sounds.
Synthwave gets its sound from 80s-style synth pads and saw basses, arpeggios, a drum-machine beat with big gated-reverb snares, and minor-key chord loops. 8-bit or chiptune music uses only a few simple channels (pulse waves, a triangle and noise), which is why a coin pickup or level-up jingle sounds instantly "retro game".
Both styles are easy to recognize in a few seconds, which makes them useful for intros, gaming videos and nostalgic edits.
Synthwave is electronic music styled after 1980s film, TV and game soundtracks, built on analog-style synthesizers and drum machines.
Typical ingredients:
- Chords: minor-key loops such as Am, F, C, G (i-VI-III-VII).
- Tempo: often around 80 to 120 BPM, with a driving, steady feel.
- Bass: a saw bass in eighths or sixteenths, often bouncing octaves.
- Pads: wide, detuned, slowly filtered.
- Drums: drum-machine kicks and hats, plus big gated snares and toms.
- Lead: a simple hook with portamento (glide) and delay.
Gated reverb is a large reverb on a drum, usually the snare, that a noise gate cuts off abruptly, so the hit sounds huge but stops short.
Wikipedia's gated reverb article credits Steve Lillywhite and Hugh Padgham with bringing it to mainstream attention around 1979, and notes it became common in 1980s pop. MusicTech has a walkthrough for making vintage gated-reverb drums for synthwave and chillwave.
Plan sections in bars. At 100 BPM, one bar of 4/4 lasts 2.4 seconds, so a 20-second cue is about eight bars. Put the chorus on a cut and the final hit near the end, leaving a short tail.
Here's a 20-second cue whose chorus lands on frame 300 (10 s) and final hit on frame 570 (19 s):
Write Python (numpy/scipy only, no samples) that renders a 20-second synthwave cue.
Output: one WAV, 48 kHz / 16-bit / stereo, exactly 960000 samples. Fixed random seed.
Music: A minor at 100 BPM, chords Am-F-C-G. Frame 0 (30 fps) is a triplet pickup: a big
gated-reverb snare with a tom, a lower tom, then the first downbeat at 0.4 s.
Verse: octave-bouncing band-limited saw bass in sixteenths, a wide detuned pad that slowly opens,
a ping-pong 25% pulse arpeggio, kick and eighth hats. Gated snares join in bar 3, a noise riser
sweeps through bar 4, and a tom fill drops into a short breath of near-silence.
On frame 300 (10.0 s) the chorus lands: crash, four-on-the-floor kick, sixteenth hats and a
pulse-width-modulated lead hook with glide, vibrato and delay. On frame 570 (19.0 s) a final hit
(kick, gated snare, crash, wide Am stab) rings into a one-second hall tail to silence.
Only the mono kick and bass below 120 Hz. Master: -14 LUFS integrated, true peak <= -1 dBTP.
Verify length, loudness and peak with ffmpeg ebur128, and check the chorus hit is on frame 300.
If you'd rather use an existing track, browse Pixabay's synthwave music or the YouTube Audio Library, and check each track's license terms.
Chiptune is music made with, or imitating, the programmable sound generator chips in vintage consoles, computers and arcade machines (Wikipedia).
Those chips offered only a few channels at once, typically:
- Pulse waves with a selectable duty cycle (such as 12.5%, 25% or 50%), which changes how thin or hollow the tone sounds.
- A triangle wave for bass.
- A noise channel for drums and effects.
Volume often moved in coarse steps rather than smooth fades, and composers faked echo by replaying a note quietly on a second channel a few frames later. Those limits are the sound.
A coin pickup is two quick rising notes on a pulse wave. The classic shape is a short low note followed by a held note a fourth higher, then a stepped fade.
Write Python (numpy/scipy only) that renders a 0.5-second retro 8-bit coin pickup.
Output: one WAV, 48 kHz / 16-bit / mono, exactly 24000 samples.
Sound: a pulse-wave channel plays a short B5 on frame 0, then E6 four 60 Hz frames (67 ms) later.
E6 holds, then steps down a 16-level volume ladder, one step per 1/60 s, each step smoothed over
1 ms, to silence before 0.5 s. Build the pulse from band-limited odd harmonics below 12 kHz so it
never aliases. A second, quieter pulse channel repeats both notes six frames later as a fake echo.
Filter like an old console: high-pass at 90 Hz and 440 Hz, low-pass at 14 kHz.
Master: true peak <= -1 dBTP. Verify with ffmpeg ebur128 and report the peak.
A level-up is a fast major arpeggio that climbs, pauses for a breath, then lands on a held chord. In this one, a four-channel build climbs through C, F and G and lands a C major chord on frame 45 (1.5 s):
Other retro touches that work in short video: a lower, falling version for "game over", a single noise burst for a hit, and a short arpeggio for menu selections. The sfxr.me generator has quick presets such as pickup/coin and power-up, handy for sketching ideas.
- Keep them band-limited. Naive square waves alias, which sounds harsh rather than retro.
- Use stepped volume. Coarse volume steps sound authentic; smooth exponential fades sound modern.
- Mind the low end. Old consoles filtered out deep bass, so keep pickups and blips light.
- Lower the level. Bright pulse waves sound louder than their meter suggests; set them by ear against your music.
If you want an even crunchier tone, a bitcrusher reduces sample rate or bit depth (Wikipedia), and ffmpeg's acrusher filter does this.
The cues above come from Opus Sounds Directory, where every sound is labelled as Claude Opus 5.5 output: the model writes the Python that renders it, and each page shows the prompt, code, spectrogram and loudness. Its UI sounds category has short blips and confirmations as well.
Other places to look:
- Freesound, with per-sound Creative Commons licenses.
- Pixabay sound effects, under the Pixabay Content License.
- sfxr.me for making your own 8-bit effects in the browser.
FAQ
- What makes music sound like synthwave?
- Analog-style synth pads and saw basses, a steady 80s drum machine beat, big gated-reverb snares, arpeggios, and minor-key progressions at around 80 to 120 BPM.
- What is 8-bit or chiptune music?
- Chiptune is music made with, or imitating, the programmable sound generator chips in vintage consoles and computers, using a few simple pulse, triangle and noise channels.
- Where can I find free synthwave music for videos?
- Pixabay has a synthwave music search under its content license, and the YouTube Audio Library has tracks for YouTube videos; check each track's terms.
- How do I make a retro coin or level-up sound?
- Use a pulse wave playing two quick rising notes for a coin, or a fast major arpeggio ending on a held chord for a level-up, with stepped volume fades.
- What is gated reverb?
- Gated reverb is a big reverb on a drum, usually the snare, that is cut off abruptly by a noise gate, giving a large but short sound common in 1980s pop.