Glass Eye
30s preview
- BPM
- 85
- Double-time
- 170
- Open Key
- 5d
- Energy
- 95/100
- Pop
- 0/100
- Length
- 8:03
- Released
- 1998
- Album
- Wormhole
- Genre
- Drum N Bass
- Loudness
- -8.8 dB
- Dynamics
- 12.9 dB
- ISRC
- GBTKW9890131
Key, BPM and audio features: model-based audio analysis · how we measure · catalogue updated July 2026
Glass Eye: downtempo drum n bass, E major (12B), 85 BPM. The feel is dark and driving. Its spectrum is weighted to the sub and kick, with a heavy low end. The master keeps unusual dynamic range for club music (crest 13 dB). A 1998 production that still circulates in sets. More underground than 99% of Optical's catalogue. In a set it works best as an opener or closing-set piece.
- Tempo:
- slower than 97% of Optical's catalogue
- Brightness:
- darker than 91% of Optical's catalogue
- Energy:
- hotter than 76% of Optical's catalogue
Sonic profile
Frequency spectrum
amplitude · bass → treble
- 32%
- Low
- 30-130 Hz
- 30%
- Low-mid
- 130-570 Hz
- 21%
- Upper-mid
- 570 Hz-2.5 kHz
- 17%
- High
- 2.5-11 kHz
FAQ
What key is Glass Eye in?
Glass Eye by Optical is in E major, or 12B on the Camelot wheel.
What BPM is Glass Eye?
Glass Eye runs at 85 BPM, a downtempo track.
What mixes well with Glass Eye?
From 12B it blends harmonically with 1B, 12A, 11B. Moving to 1B lifts the energy a step.
Is Glass Eye good for peak time?
With energy 95 out of 100 at 85 BPM, it works best as an opener or closing-set piece.
Mixes harmonically
12B → 11B · 1B · 12AFrom 12B, 1B (B major) lifts the energy a step; 12A (D♭ minor) settles into the relative minor; 11B (A major) cools the energy down a step.
How to mix it
In 12B at 85 BPM: 1B (B major) — move to 1B to push the floor harder; 12A (D♭ minor) — switch to 12A for a mood change without losing the groove; 11B (A major) — drop to 11B to bring the room down gently.
Pitch range at ±6%: 80-90 BPM — anything in that window beatmatches without sounding stretched.
Key on the fader: without key lock (Master Tempo on CDJs), above roughly +5% it plays a semitone higher, so treat it as 7B rather than 12B; below -5% it reads as 5B. With key lock on, it stays 12B across the whole range.
Programming: an opener or closing-set piece.
Similar tempo
Within ±3 BPM of 85 — beatmatch without a big tempo pull.
More drum n bass
More from Optical
Full profile
Other recommendations
Beyond strict key and genre matches: tracks that still sit in beatmatch range of 85 BPM with a compatible energy and groove — candidates for a key jump or a genre crossover.
Every insight on this page, for your own library.
Vibes runs this same analysis on the music you own: keys, energy and vibe for every track, organized into sets you can actually play.