Disclosed are a spiral curve type music sheet in which different notes are displayed at different positions on a spiral curve based on the pitches of notes, and an apparatus and method for providing a spiral curve type music sheet. The apparatus for providing a spiral curve type music sheet may include a memory configured to store a spiral curve type music sheet in which different notes are displayed at different positions on a spiral curve based on the pitch of the note and note data, and a processor configured to determine the note symbol position related to the note data on the spiral curve in the spiral curve type music sheet based on the frequency of the note data.

A system is provided for adaptive demarcation of a selectively defined tonal scale on a musical instrument having a set of note actuators which span at least one musical octave. A scale acquisition portion acquires a tonal scale characterized at least by a predetermined mode and predetermined key signature, to define a predefined ordered series of tone components. The tone components are represented by different musical notes, and are successively separated in pitch by tonal intervals. A scale delineation portion coupled to the scale acquisition portion adaptively maps the tone components to a corresponding subset of the note actuators within at least one musical octave. A plurality of marker portions coupled respectively to the note actuators are selectively enabled according to the tone components' mapping to visually indicate the subset of note actuators corresponding thereto. Visual indication is thereby adaptively maintained for the note actuators of the acquired tonal scale.

An apparatus, method, and computer-readable storage medium that generate a harmonized musical piece. The method includes receiving a chord selection including a musical key and a scale selection, generating, within a digital audio work session, a chord progression sequence based on the received chord selection, in response to a detected chord selection change, modifying the chord progression sequence to include a chord progression corresponding to the chord selection change, setting the chord progression sequence as a master sequence, in response to detecting a second progression sequence within the digital audio work session, transmitting an identifier to the second progression sequence setting it as a slave sequence, and establishing a synchronized communication link between the master and the slave sequences such that changes made in the master sequence are automatically effectuated in the slave sequence, and combining the master sequence and the slave sequence to form a composed musical piece.

A modular stringless guitar includes a keyboard, a speaker, a guitar body, a chord board, a guitar neck, a tuning device, and a light indication system. The guitar body is a box structure. The keyboard and the speaker are disposed in the guitar body. A plug-in portion disposed on the guitar neck is movably connected to an interface of the guitar body. The tuning device is disposed on the guitar neck. The tuning device includes a rocker and a sensor. A first end of the rocker is connected to the sensor. A second end of the rocker extends out of a side surface of the guitar neck. The light indication system includes a first indicator light and a second indicator light. The first indicator light indicates playing positions on the keyboard. The second indicator light indicates playing positions on the chord board.