Importance

Loading Importance Indicators...

Abstract

A chord or scale indicating device includes at least one fixed member and at least one movable member. On one of the fixed or movable members a scale is provided of at least one octave including both the white and black notes of the octave. In this octave, the white notes A, G and D, are greater in transverse or radial extent than the white notes E, F, B, and C by a factor of about 1.5. The other of the fixed and movable members includes a series of indicating positions which indicate at least one scale or chord position for a given input key. Relative movement between the fixed and the movable member will enable the scale and or chord positions to be determined for each of the notes in the ocatve by such relative movement. Some of the embodiments disclosed in the specification are linear where the relative movement between the fixed and the movable member is either lateral or vertical and some of the embodiments disclosed are radial embodiments wherein rotational movement between the fixed and the movable member occurs. The embodiments disclosed include the major scale positions and both minor scale positions. The embodiments further include all of the chords for the given input key and related chords for the input key including the subdominant chord and dominant seventh related chord. For the given input key the major and minor tonic chords, the augmented chords, the sixth chords, the major and minor seventh chords, the diminished chords, the dominant and diminished ninth chords are included. The device is particularly useful in teaching students the relationship of the scales and chords illustrate. In a preferred embodiment the keyboard positions for both the treble clef and bass clef are included for all of the chords of all input keys.

Loading the Abstract Image...

First Claim