Abstract: Disclosed is apparatus comprising at least two elements whose positions relative to each other are alterable, and in which at least a portion of each element is visible during use of the apparatus, and wherein a first of said elements exhibits an indicated sequence, and a second of said elements exhibits at least one of a group of musical representations comprising:an alphabetic representation of musical notes;a representation of a keyboard;a representation of finger positions on an instrument;an accepted musical notation;and wherein the relative positions of said first and second elements may be altered so that correlating said indicated sequence with a said musical representation indicates at least one of a scale or chord. Various embodiments of apparatus may be used in determining scales, and variations and modes thereof, find use in creating and determining chords, find use in key transposition and/or determining fingering on keyboards and frets.

Abstract: A transposition rule for musical theory for the visual indication of the sequence of notes of musical scales and/or chords in the various keys of a tone system. The transposition rule includes an elongated base member which is provided with fixed scales, wherein the scales include the notes of the tone system arranged with a uniform division, and replaceable sliding scales which are displaceably guided in the base member and are provided with the sequences of notes of the musical scale and of the chords in a division corresponding to the division of the fixed scales. The slide member is arranged in the base member in an on-edge position.

Abstract: A music learning aid has a base and a sliding template. The template has windows which allow viewing of musical information imprinted on the base at different positions. Each position is selected by being able to view a keynote through a window so that the cut-out slots in the template then show the musical information for that keynote and scale or chord. The musical information may include the musical notation and the musical instrument playing instructions. In another embodiment, a learning aid takes the form of an electronic calculator where different information sets may be displayed on a liquid crystal display according to instructions inputted on a keypad.

Abstract: In a method of and means for producing musical note relationships there is provided an array of staggered lines or rows (1) of symbols, in which each symbol represents a musical note. Each line (1) comprises a repeated series of twelve symbols forming a musical series of semitones known as a chromatic scale, and each line is staggered with respect to adjacent lines such that groups of the symbols which represent the same musical note relationship, such as intervals, scales, chords, etc, form the same visual configuration, for example diagonal configurations (6 to 9) or vertical configuration (14 to 19), at respective locations in the array. In one embodiment, a device including means bearing such an array may be used as a learning aid comprising two overlapping members slidably movable relative to each other. Alternatively the contact positions of a keyboard of a keyboard musical instrument or a fingerboard of a stringed musical instrument may be arranged in accordance with the array.

Abstract: A device for demonstrating musical scales and chords in various tonics for use with a fretted stringed musical instrument. A housing is of a slide-rule nature and has a transparent simulated fingerboard positioned within a display window. This fingerboard is reticulated, with an imprinted series of uniformly-spaced parallel string lines extending longitudinally and representing the strings of the instrument. These lines are regularly interrupted by an imprinted series of position alignment indicia and tone letters. A series of uniformly-spaced printed parallel lines transverse the longitudinal lines and represent the nut and frets of the instrument. Additional display windows disclose a plurality of related information; these windows are used primarily to identify certain tonal characteristics. A plurality of displaceable medial sliding members is provided, each having a system of tone indicators printed in a predetermined manner. These indicators are used to identify tonality.

Abstract: This invention consists of a device for composing, decomposing, retransposing and retranscribing all chords and scales contained in music. The device in question comprises two superimposed disks of different diameters, joined at their center by a pin enabling the disks to rotate independently. The twelve musical notes of the diatonic scale are written on the lower disk with the larger diameter. Intervals, interval qualifications, degrees of intervals and various indexed scales are written on the upper disk with the smaller diameter. Whatever the composition, decomposition, retransposition and retranscription information required for a given chord or scale, the user, by rotating the disks, matches the chosen note with the "FUNDAMENTAL" interval, on which all chord or scale building is based. This allows him to see the position, degree, interval and qualification of the other notes of the chord or scale. This device may be used for all diatonic, monophonic and polyphonic instruments.

Abstract: A modulation rule having a member marked with a keyboard including white keys and black keys arranged in a similar manner to that of a keyboard musical instrument, and an indication table in which the names of keys are marked, for which the keys marked on each division, from left to right, are consecutively higher by one semitone; a movable member having divisions marked with numeral notes respectively, capable of being moved to have one division thereof aligned with a first division marked with a given key to provide the indication of scale at the given key; a plurality of indicating elements arranged in a certain relation with the keyboard and capable of being adjusted to provide visual indications concerning the keys, corresponding to the indicating elements which respectively should be lowered or raised by one semitone.

Abstract: A Harmonic Conversion Wheel is disclosed comprising a circular disk, a faceplate and attaching means joined together along a common axis which is the centerpoint of said elements. By rotation of the disk about said axis and proper registration of said disk with the windows positioned in the faceplate, an artist, composer, student of music, performer or arranger has at their disposal a multitude of information regarding the law of intervals and similar musical relationships concerning tonics, chords, scales and notes within a scale. Thus, a person without analogous skills can perform, rearrange, transpose or learn music to the best of his ability while developing his own caliber of musical knowledge and expertise.

Abstract: There is disclosed a device of the calculating rule type that is useful in music analysis to assist in spelling chords and determining scales, transposing of chords or notes, identifying key signatures, determining minor keys relative to their major keys, performing chord analysis, determining relationships among chords, and writing of music. The device comprises a base plate member with at least one movable member mounted thereon. There is provided a plurality of 12 indicia representative of the 12 notes of an octave of the musical scale disposed on one of the members in a linear, circle of fifths progression. The other of the members bears an index mark and a plurality of 11 calibration marks in linear progression thereon. Also disposed on the other of the members is a plurality of indicia cooperative with the first plurality of indicia to perform the functions of spelling of chords and scales and of transposing of chords or notes.

Abstract: A chord inversion coordination aid comprises a plurality of dials of increasing diameter and each representing a particular chord type and having a peripheral array of the scale tone names of the chord in its root and inverted positions arranged in sectors, whereby upon aligning various sectors of the discs a given chord progression can be arranged according to the most easily played chord inversions. The dial may be centrally pivoted behind a cover sheet having a window therein to expose the dial sectors, and a pad of staff paper may be mounted on the cover sheet.

Abstract: The invention is a musical aid used to simplify the comprehension of chord inversion structure and enable the composer to more readily visualize the keyboard location and fingering of chords and their inversions used in a composition, the device having a frontal panel display of the scale tones of a particular key signature and a sliding member behind the panel which is provided with numbered, pivotal indicators to select a triad orderd in the root or an inverted position from the Scale tones on the panel, the invention including a rotatable disc on the sliding member having selectively exposeable chords displayed on the periphery thereof naming the triads and their inversions occuring in the key signature of the panel.