Supported chord types and common progressions

Chords & Progressions

Sketchatone supports a wide variety of chord types and includes preset progressions for common musical styles.

Chord Notation

Chords are specified using standard notation:

[Root][Quality][Extensions]

Examples

Notation	Name	Notes
`C`	C Major	C, E, G
`Am`	A Minor	A, C, E
`G7`	G Dominant 7th	G, B, D, F
`Dmaj7`	D Major 7th	D, F#, A, C#
`Em7`	E Minor 7th	E, G, B, D
`F#m`	F# Minor	F#, A, C#
`Bb`	Bb Major	Bb, D, F

Supported Chord Types

Triads

Quality	Suffix	Example
Major	(none)	`C`, `G`, `D`
Minor	`m`	`Am`, `Em`, `Dm`
Diminished	`dim`	`Bdim`
Augmented	`aug`	`Caug`

Seventh Chords

Quality	Suffix	Example
Dominant 7th	`7`	`G7`, `D7`
Major 7th	`maj7`	`Cmaj7`, `Fmaj7`
Minor 7th	`m7`	`Am7`, `Em7`
Diminished 7th	`dim7`	`Bdim7`
Half-Diminished	`m7b5`	`Bm7b5`

Extended Chords

Quality	Suffix	Example
Add 9	`add9`	`Cadd9`
Suspended 2	`sus2`	`Dsus2`
Suspended 4	`sus4`	`Asus4`

Preset Progressions

Pop/Rock

Preset	Key	Chords	Progression
`c-major-pop`	C	C, G, Am, F	I-V-vi-IV
`g-major-pop`	G	G, D, Em, C	I-V-vi-IV
`d-major-pop`	D	D, A, Bm, G	I-V-vi-IV
`a-major-pop`	A	A, E, F#m, D	I-V-vi-IV

Minor Key

Preset	Key	Chords	Progression
`a-minor-pop`	Am	Am, F, C, G	i-VI-III-VII
`e-minor-pop`	Em	Em, C, G, D	i-VI-III-VII

Classic

Preset	Key	Chords	Progression
`c-major-50s`	C	C, Am, F, G	I-vi-IV-V

Using Chords in Configuration

In Strumming Config

Set the chord to strum:

{
  "strumming": {
    "chord": "Am7",
    "midi_channel": 0
  }
}

With Action Rules

Map buttons to change chords:

{
  "action_rules": {
    "rules": [
      {
        "id": "set-dm7",
        "name": "Set Dm7",
        "button": "button:1",
        "action": ["set-chord", "Dm7", 4],
        "trigger": "press"
      }
    ]
  }
}

With Chord Progressions

Map button groups to progressions:

{
  "action_rules": {
    "groups": [
      {
        "id": "chord-buttons",
        "name": "Chord Buttons",
        "buttons": ["button:1", "button:2", "button:3", "button:4"]
      }
    ],
    "group_rules": [
      {
        "id": "progression",
        "name": "C Major Pop",
        "group_id": "chord-buttons",
        "trigger": "press",
        "action": {
          "type": "chord-progression",
          "progression": "c-major-pop",
          "octave": 4
        }
      }
    ]
  }
}

Sketchatone

Turn your drawing tablet into a MIDI strumming controller