Optical Ears
- BPM
- 136
- Open Key
- 7m
- Energy
- 70/100
- Pop
- 0/100
- Length
- 6:38
- Released
- 2010
- Album
- Ep
- Genre
- Drum N Bass
- Loudness
- -14.3 dB
- ISRC
- DEBL60981461
Key, BPM and audio features: model-based audio analysis · how we measure · catalogue updated July 2026
At 136 BPM in E♭ minor (2A), Optical Ears is a driving up-tempo drum n bass production. The mix is almost entirely instrumental. The master keeps real dynamic headroom. A 2010 production that still circulates in sets. More underground than 99% of Sigma's catalogue. In a set it works best as a floor-filler.
- Groove:
- groovier than 89% of Sigma's catalogue
- Energy:
- calmer than 85% of Sigma's catalogue
Sonic profile
Frequency spectrum
amplitude · bass → treble
FAQ
What key is Optical Ears in?
Optical Ears by Sigma is in E♭ minor, or 2A on the Camelot wheel.
What BPM is Optical Ears?
Optical Ears runs at 136 BPM, a driving up-tempo track.
What mixes well with Optical Ears?
From 2A it blends harmonically with 3A, 2B, 1A. Moving to 3A lifts the energy a step.
Is Optical Ears good for peak time?
With energy 70 out of 100 at 136 BPM, it works best as a floor-filler.
Mixes harmonically
2A → 1A · 3A · 2BFrom 2A, 3A (B♭ minor) lifts the energy a step; 2B (F♯ major) brightens to the relative major; 1A (A♭ minor) cools the energy down a step.
How to mix it
In 2A at 136 BPM: 3A (B♭ minor) — move to 3A to push the floor harder; 2B (F♯ major) — switch to 2B for a mood change without losing the groove; 1A (A♭ minor) — drop to 1A to bring the room down gently.
Pitch range at ±6%: 128-144 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 9A rather than 2A; below -5% it reads as 7A. With key lock on, it stays 2A across the whole range.
Programming: a floor-filler.
Similar tempo
Within ±3 BPM of 136 — beatmatch without a big tempo pull.
More drum n bass
More from Sigma
Full profile
Other recommendations
Beyond strict key and genre matches: tracks that still sit in beatmatch range of 136 BPM with a compatible energy and groove — candidates for a key jump or a genre crossover.
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