Elm Chords

Parse chords sheets for guitar and ukulele in Elm!

Installation

elm install Arkham/elm-chords

Example

Here's an example of what you could do:

import Html exposing (Html)
import Chords exposing (Chord, Voicing)
import Chords.Chart
import Instruments.Guitar as Guitar

chords : List String
chords =
    [ "Am"
    , "E"
    , "C"
    , "Dm7"
    , "G"
    , "F"
    , "A#"
    , "C#"
    ]


view : Html msg
view =
    Html.div []
        (chords
            |> List.map
                (\name ->
                    ( name, Chords.parseChord name )
                )
            |> List.map
                (\( name, result ) ->
                    case result of
                        Ok chord ->
                            viewChord chord

                        Err err ->
                            Html.span []
                                [ Html.text ("Could not parse " ++ name)
                                ]
                )
        )


viewChord : Chord -> Html msg
viewChord chord =
    let
        config =
            { tuning = Guitar.defaultTuning
            , numFrets = 10
            }

        name =
            Chords.toString chord
    in
    case Guitar.voicings config chord of
        [] ->
            Html.span []
                [ Html.text
                    ("Could not find voicing for chord " ++ name)
                ]

        first :: rest ->
            Chords.Chart.view name first

This will parse the chords, generate some voicings and display the charts. You should see something like this!

If you'd like to use Ukulele instead, import Instruments.Ukulele and use it in the same way!

Tests

Pull the repo and run elm-test