Castles in the Sky by 1991 cover art

Castles in the Sky

1991

Key
4B · A♭ major
BPM
174
Half-time
87
Open Key
9d
Energy
97/100
Pop
53/100
Length
3:13
Released
2025
Genre
Drum N Bass
Loudness
-1.3 dB
ISRC
NLF712500340

Key, BPM and audio features: model-based audio analysis · how we measure · catalogue updated July 2026

A drum n bass cut, Castles in the Sky sits in A♭ major (4B) at 174 BPM. The feel is dark and driving. It is vocal-led. The master is loud and heavily compressed. Better known than 91% of 1991's catalogue. In a set it works best as an opener or closing-set piece.

Tempo:
slower than 84% of 1991's catalogue
Brightness:
darker than 75% of 1991's catalogue

Sonic profile

EnergyGrooveMoodOrganicInstr.LiveTempo
Energy97
Mood15Dark
Groove48
Acoustic1
Instrumental2
Live14
Speech7

Frequency spectrum

amplitude · bass → treble

FAQ

What key is Castles in the Sky in?

Castles in the Sky by 1991 is in A♭ major, or 4B on the Camelot wheel.

What BPM is Castles in the Sky?

Castles in the Sky runs at 174 BPM.

What mixes well with Castles in the Sky?

From 4B it blends harmonically with 5B, 4A, 3B. Moving to 5B lifts the energy a step.

Is Castles in the Sky good for peak time?

With energy 97 out of 100 at 174 BPM, it works best as an opener or closing-set piece.

Mixes harmonically

4B3B · 5B · 4A

From 4B, 5B (E♭ major) lifts the energy a step; 4A (F minor) settles into the relative minor; 3B (D♭ major) cools the energy down a step.

#TrackKey·BPM

Every move from 4B

5BSimple Mix Upper
3BSimple Mix Downer
4ATonal Shift·
5ADiagonal Mix Upper
3ADiagonal Mix Downer
7ACompatible Tone·
6BHigh Energy Boost▲▲▲
2BHigh Energy Drain▼▼▼
7BParallel Key Upper▲▲
1BParallel Key Downer▼▼
11BTritone Jump▲▲
8BRelated Keyrisky

How to mix it

In 4B at 174 BPM: 5B (E♭ major) — move to 5B to push the floor harder; 4A (F minor) — switch to 4A for a mood change without losing the groove; 3B (D♭ major) — drop to 3B to bring the room down gently.

Pitch range at ±6%: 164-184 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 11B rather than 4B; below -5% it reads as 9B. With key lock on, it stays 4B across the whole range.

Programming: an opener or closing-set piece.

Similar tempo

Within ±3 BPM of 174 — beatmatch without a big tempo pull.

#TrackKey·BPM

More drum n bass

#TrackKey·BPM

More from 1991

Full profile
#TrackKey·BPM

Other recommendations

Beyond strict key and genre matches: tracks that still sit in beatmatch range of 174 BPM with a compatible energy and groove — candidates for a key jump or a genre crossover.

#TrackKey·BPM

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