Audio in the Cloud

J-pop · K-pop · C-pop

A-Pop Backline

Write a chord chart in numbers, pick a key, and a synthesized pop band plays it back with the piano out front: strings, synth, bells, bass, drums, and a guzheng-style zither. Key changes for the last chorus are one line.

Ready bar 1 of 28
Key of E♭72 bpm

How to write the chart
Verse: 1 5 6m 4
One line per section. The name before the colon is optional. Each chord is one bar. A name on a line of its own (Verse: or [Verse]) makes one section of the lines after it, up to the next name.
4maj7 · 3m7 · 5sus4 · 2m9
m or - for minor, then 7, maj7, 9, 11, 13, 6, sus2, sus4, add9, dim, aug, ♭9, ♯11.
IVM7 III7 vim7
Roman numerals work too: capitals are major, lower case minor. Handy for borrowed chords like III7, which a plain 3 reads as minor.
b7 · b6 · #4m7b5
Flat or sharp a scale degree. Borrowed chords like b7 and b6 play major.
5/7 · 4m/b6
Slash chord: the bass plays the second number. Good for walking bass lines down.
(4 5)
Split bar: both chords share one bar.
1 5 6m 4 x2 · %
Repeat the line, or repeat the previous bar (the line before's last, at the start of a line).
Key +1
On its own line: everything after it moves up a half step. Key +2 is a whole step, Key -1 goes down.
Intro, Verse, Pre, Chorus, Bridge, Outro
These names set each section's energy when "Follow section names" is on, and the band arranges itself around them.
Aメロ · Bメロ · サビ · 主歌 · 副歌 · 후렴
Japanese, Chinese and Korean section names work too. 落ちサビ (the hushed chorus) drops the band out.
// a note · # a note
Left out, like the header lines of a chart pasted from elsewhere (Key: E♭, 4/4, Capo 3, Title: …). A line that starts with a chord like #4m7b5 is still chords.

Keyboard shortcuts

Space
Play or stop the band (paused, carry on)
J
Show or hide the mixtape
← →
Move between bars in the chart; Enter plays from that bar
?
Open or close this list

With the mixtape open

  1. ZPrevious
  2. XPlay
  3. CPause
  4. VStop
  5. BNext

The keys stay quiet while you type in the chart. Esc closes this list.