At 146 BPM, Only Once Away My Son by Brian Eno sits in C# Major (Camelot 3B). This tempo and key combination is common in dance and uptempo music. Below are the chords, scale notes, and harmonically compatible keys for mixing or producing in this groove.
Scale & Notes of C# Major
The C# Major scale is built from these seven notes:
C#D#FF#G#A#C
Its relative key is A# Minor (same notes), and its parallel key is C# Minor. If you're transposing or looking for a vocal-comfortable key, those are the natural neighbours.
Chords in C# Major
The seven diatonic triads in this key — the chord palette most of the song will draw from:
| Degree | Chord | Quality |
|---|
| I | C# | Major |
| ii | D#m | Minor |
| iii | Fm | Minor |
| IV | F# | Major |
| V | G# | Major |
| vi | A#m | Minor |
| vii° | Cdim | Diminished |
Indian Classical: the Todi thaat
In Hindustani classical terms, C# Major maps to the Todi thaat (Western mode: Neapolitan Minor (Todi mode)). One of the most chromatic thaats — ♭2, ♭3, raised 4th (♯4), and ♭6. Equivalent to the Neapolitan Minor scale in Western theory (also called Hungarian Gypsy or Romanian minor). Intensely complex and expressive. Traditional listening time: Late morning (10 am–noon).
If you want to sing or practise in this key, set your tonic (Sa) to C#. Ragas built on this thaat:
- Miyan ki Todi — Full Neapolitan minor — ♭2 ♭3 ♯4 ♭6, the quintessential Todi. Intense pathos, high art.
- Gujari Todi — Neapolitan minor, slightly lighter ornamentation. Tender pathos, emotional.
- Multani — Todi scale with omitted notes in ascent — afternoon variant. Serious, weighty (Afternoon).
- Bilaskhani Todi — Todi ♭7 variant — adds flat 7th for extra darkness. Grief, depth (linked to Tansen legend) (Late night).
Set Tanpura to C# →Practise in this key →Find another song's key →
Harmonic mixing (for DJs)
Only Once Away My Son sits at Camelot 3B. For a smooth harmonic transition, mix it with tracks in 2B, 3A, 4B — adjacent keys on the Camelot wheel that share most of their notes.