Loading (Intro) by John O'Callaghan cover art

Loading (Intro)

John O'Callaghan

30s preview

Key
5B · E♭ major
BPM
125
Open Key
10d
Energy
27/100
Pop
0/100
Length
2:16
Released
2014
Album
Subculture the Residents
Genre
Trance
Loudness
-17.6 dB
Dynamics
14.5 dB
ISRC
NLD681401240

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

At 125 BPM in E♭ major (5B), Loading (Intro) is a club-tempo trance production. Tonally it lands brooding and low-slung. The mix is almost entirely instrumental. Its spectrum is centred in the low-mids, warm and bass-forward. The master keeps real dynamic headroom. The master keeps unusual dynamic range for club music (crest 15 dB). A 2014 production that still circulates in sets. More underground than 99% of John O'Callaghan's catalogue. For programming, treat it as a warm-up or breakdown cut.

Low end:
more treble-tilted than 99% of John O'Callaghan's catalogue
Tempo:
slower than 98% of John O'Callaghan's catalogue
Energy:
calmer than 97% of John O'Callaghan's catalogue

Sonic profile

EnergyGrooveMoodOrganicInstr.LiveTempo
Energy27
Mood5Dark
Groove51
Acoustic55
Instrumental96
Live9
Speech5

Frequency spectrum

amplitude · bass → treble

601252505001k2k4k8k
23%
Low
30-130 Hz
34%
Low-mid
130-570 Hz
27%
Upper-mid
570 Hz-2.5 kHz
16%
High
2.5-11 kHz

FAQ

What key is Loading (Intro) in?

Loading (Intro) by John O'Callaghan is in E♭ major, or 5B on the Camelot wheel.

What BPM is Loading (Intro)?

Loading (Intro) runs at 125 BPM, a club-tempo track.

What mixes well with Loading (Intro)?

From 5B it blends harmonically with 6B, 5A, 4B. Moving to 6B lifts the energy a step.

Is Loading (Intro) good for peak time?

With energy 27 out of 100 at 125 BPM, it works best as a warm-up or breakdown cut.

Mixes harmonically

5B4B · 6B · 5A

From 5B, 6B (B♭ major) lifts the energy a step; 5A (C minor) settles into the relative minor; 4B (A♭ major) cools the energy down a step.

#TrackKey·BPM

Every move from 5B

6BSimple Mix Upper
4BSimple Mix Downer
5ATonal Shift·
6ADiagonal Mix Upper
4ADiagonal Mix Downer
8ACompatible Tone·
7BHigh Energy Boost▲▲▲
3BHigh Energy Drain▼▼▼
8BParallel Key Upper▲▲
2BParallel Key Downer▼▼
12BTritone Jump▲▲
9BRelated Keyrisky

How to mix it

In 5B at 125 BPM: 6B (B♭ major) — move to 6B to push the floor harder; 5A (C minor) — switch to 5A for a mood change without losing the groove; 4B (A♭ major) — drop to 4B to bring the room down gently.

Pitch range at ±6%: 117-133 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 12B rather than 5B; below -5% it reads as 10B. With key lock on, it stays 5B across the whole range.

Programming: a warm-up or breakdown cut — early set or after a peak to reset the room.

Similar tempo

Within ±3 BPM of 125 — beatmatch without a big tempo pull.

More trance

More from John O'Callaghan

Full profile

Other recommendations

Beyond strict key and genre matches: tracks that still sit in beatmatch range of 125 BPM with a compatible energy and groove — candidates for a key jump or a genre crossover.

#TrackKey·BPM

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