Interactive Backing Track

A backing track that tells you what is happening: the chord playing right now, the chord coming next, the scales that fit and the notes under your fingers.

Try it now

This demo runs at 100 BPM in 4/4. The first complete bar starts at 2.4 seconds - every chord change below is derived from those three numbers, not typed in by hand.

Before

–

Now

–

Bar 1 hasn't started yet

Next

Am7

Bar
– of 16
0:00 / 0:00
Loop

Loading audio…

Keyboard: space play/pause, ← → previous/next chord, ↑ ↓ volume, L loop.

Improvise over this track

The fretboard follows the chord that is playing right now.

Detail level

Roots, one pentatonic and one scale suggestion.

No chord playing right now.

Chords

Transpose

Build a chord

Cmaj7C – E – G – B

Fretboard

A Dorian · Fret 0–22

E
E·5
F#·6
G·b7
A·1
B·2
C·b3
D·4
E·5
F#·6
G·b7
A·1
B·2
C·b3
D·4
B
B·2
C·b3
D·4
E·5
F#·6
G·b7
A·1
B·2
C·b3
D·4
E·5
F#·6
G·b7
A·1
G
G·b7
A·1
B·2
C·b3
D·4
E·5
F#·6
G·b7
A·1
B·2
C·b3
D·4
E·5
D
D·4
E·5
F#·6
G·b7
A·1
B·2
C·b3
D·4
E·5
F#·6
G·b7
A·1
B·2
C·b3
A
A·1
B·2
C·b3
D·4
E·5
F#·6
G·b7
A·1
B·2
C·b3
D·4
E·5
F#·6
G·b7
E
E·5
F#·6
G·b7
A·1
B·2
C·b3
D·4
E·5
F#·6
G·b7
A·1
B·2
C·b3
D·4
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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21
22

Current chord: Am7

  • Root
  • Third
  • Fifth
  • Seventh
  • Extension
  • Scale tone
Labels:

Scale suggestions

Musical options for this chord - not the one correct answer.

A – B – C – D – E – F# – G
1 – 2 – b3 – 4 – 5 – 6 – b7

Minor mode with a major sixth. The classic choice over m7 chords.

→ Major sixth suits m7 chords in most contexts

Display

Fret range

Chord analysis

Am7
A – C – E – G
1 – b3 – 5 – b7

Recommended connectionsAm7 into D7

  • A Acommon tone
  • C Ccommon tone
  • G F#half step down
  • E F#whole step up

Common tones: A, C

New notes in the next chord: D, F#

Your practice plan

0/10 done

Ten exercises built from the chords above, easiest first. Work down the list - each one adds a single new demand.

The demo's chord chart

  1. Am7Bar 1–2
  2. D7Bar 3–4
  3. Gmaj7Bar 5–6
  4. Cmaj7Bar 7–8
  5. Am7Bar 9–10
  6. D7Bar 11–12
  7. Gmaj7Bar 13–14
  8. Cmaj7Bar 15–16

What an interactive backing track is

An ordinary backing track is audio and nothing else: you hear a chord change, but you have to work out what changed and what fits over it. An interactive backing track carries its chord chart with it. While the audio plays, the current chord, the next chord, the bar number and the song section stay on screen - and the fretboard below updates with it.

How the chord sync is calculated

Nobody types timestamps. The creator enters four musical facts, and the timing follows from them: tempo, time signature, the moment bar 1 begins, and how many bars each chord lasts.

  • One beat lasts 60 ÷ BPM seconds - at 100 BPM that is 0.6 s.
  • One bar of 4/4 is four of those beats: 2.4 s.
  • A chord held for two bars therefore lasts 4.8 s.
  • Everything after bar 1 is offset by the moment bar 1 starts.

Why this beats a YouTube backing track

On YouTube you get audio and a comment section. Here the chord chart is data: you can jump straight to a chord, loop the one change you keep missing, loop a whole section, and see the scale and arpeggio shapes for exactly the chord that is sounding. Nothing has to be paused, rewound or guessed.

How to practise with it

Start small and let the display carry the theory.

  • Play only the root of each chord on beat 1 until the changes feel obvious.
  • Add the 3rd and the 7th - they are what make a chord change audible.
  • Loop a single chord and stay inside its arpeggio for a full minute.
  • Switch on the connection view and aim for the note the next chord shares or resolves to.
  • Turn the helpers off and check whether you still hear the change.

Publishing your own backing tracks

Upload the audio, enter tempo, time signature and the moment bar 1 begins, then write the chords bar by bar - “Am7 x2 | D7 x2” is a complete chart. A preview shows the computed chord chart against your audio and warns you if the two drift apart before anything is published. Your referral link stays the same across all of your tracks, so one link in a video description works for your whole catalogue.

Become a creator

Frequently asked questions

Do I have to enter the seconds of each chord?
No. You enter tempo, time signature, where bar 1 starts and how many bars each chord lasts. The timing is computed from that, and it is recomputed whenever you change one of those values.
Does the chord display stay correct when I skip around?
Yes. The chord shown is derived from the audio player's own position, so seeking, pausing, looping or switching browser tabs cannot push it out of sync.
Which time signatures are supported?
4/4, 3/4, 2/4, 6/8, 12/8, 5/4 and 7/8 are offered directly, and the timing maths works for any other meter you enter. Tempo changes within one track are not supported yet - the data model already allows for them.
Is the improviser the same tool as the standalone one?
It is literally the same tool, mounted under the player and fed by the track. You can switch it to free mode at any time and explore chords, scales and positions while the track keeps playing.
Do I need an account?
Not for the demo on this page. An account is needed to buy a track from a creator, or to publish your own.

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