# 和弦

Sonic Pi has built-in support for chord names which will return lists. Try it for yourself:

    play chord(:E3, :minor)

Now, we’re really getting somewhere. That looks a lot more pretty than the raw lists (and is easier to read for other people). So what other chords does Sonic Pi support? Well, a lot. Try some of these:

- `chord(:E3, :m7)`
- `chord(:E3, :minor)`
- `chord(:E3, :dim7)`
- `chord(:E3, :dom7)`

## Arpeggios

We can easily turn chords into arpeggios with the function `play_pattern`:

    play_pattern chord(:E3, :m7)

Ok, that’s not so fun - it played it really slowly. `play_pattern` will play each note in the list separated with a call to `sleep 1` between each call to `play`. We can use another function `play_pattern_timed` to specify our own timings and speed things up:

    play_pattern_timed chord(:E3, :m7), 0.25

We can even pass a list of times which it will treat as a circle of times:

    play_pattern_timed chord(:E3, :m13), [0.25, 0.5]

This is the equivalent to:

    play 52
    sleep 0.25
    play 55
    sleep 0.5
    play 59
    sleep 0.25
    play 62
    sleep 0.5
    play 66
    sleep 0.25
    play 69
    sleep 0.5
    play 73

Which would you prefer to write?