Abstract: An electronic musical apparatus is designed for using original music contents kept under protection. In the apparatus, an editing section is operable to edit an original music content into a variational music content. A content judging section compares the variational music content with the original music content and judges a degree of difference therebetween to provide a judgment. A transfer control section operates based on the judgment for permitting transfer of the variational music content to an external apparatus beyond the protection.

Abstract: An electronic musical apparatus is designed for using original music contents kept under protection. In the apparatus, an editing section is operable to edit an original music content into a variational music content. A content judging section compares the variational music content with the original music content and judges a degree of difference therebetween to provide a judgment. A transfer control section operates based on the judgment for permitting transfer of the variational music content to an external apparatus beyond the protection.

Abstract: A musical tone control apparatus includes a sound source having a delay feedback synthesis circuit for forming musical tone signal by performing arithmetic processing of musical tone control data on the basis of a nonlinear table, a coordinate designation device capable of designating an arbitrary position and outputting a coordinate position corresponding to the designated position, a coordinate display device for displaying the coordinate position outputted by the coordinate designation device, and a table forming unit for forming the nonlinear table on the basis of the coordinate position outputted by the coordinate designation device.

Abstract: In an automatic rhythm performing apparatus, pattern memory stores rhythm pattern data of respective rhythm patterns for respective rhythm instrument tones as identified by channel numbers. Selected rhythm pattern data are read out together with the channel numbers and are supplied to corresponding tone generation channels for respective instrument tones according to the selected rhythm kind. There is provided a rewritable data memory storing channel alteration data for altering the channel number included in the read-out pattern data to another channel number. The rhythm pattern data read out from the pattern memory are supplied, as modified by the channel alteration data read out from the rewritable data memory, to the tone generation channels of the alteredly designated channel number. The channel alteration data of the data memory are rewritten by the manipulation of keys in the performance keyboard, whereby the rhythm patterns of the instrument tones are easily altered.

Abstract: An electronic musical instrument having automatic bass chord accompaniment performance in which bass tones are generated in different manners depending on the state of the keyboards of the device. Chord and bass notes are selected using lower and pedal keyboards, respectively. The chord type and root note are identified from the depressed keys of the keyboards. The bass tone is generated with consideration of whether the identified root note coincides with the selected bass note. In the situation where the root note coincides with the bass note, a bass tone is generated based on a stored predetermined bass pattern corresponding to the particular chord type and root note identified. In the situation where the root note does not coincide with the bass note, or if a chord type has not been identified, a bass tone is generated based on the depressed bass note key.

Abstract: A rhythm tone source assigning apparatus for use in an electronic musical instrument comprises a memory having a plurality of storing regions corresponding to a plurality of input operating manipulators each being comprised of a keyboard key or a switch. Arrangement is provided so that by writing a tone source identifying datum corresponding to desired one of a plurality of rhythm tone sources in one of the storing regions corresponding to an input operating manipulator one after another, rhythm tone sources can be assigned to the plurality of input operating manipulators. Thus, this electronic musical instrument greatly facilitates its user of his performing or inputting operations in a hand percussion or a rhythm sequence programming by using these manipulators. This is, for each rhythm, the user is able to obtain his favorite convenient arrangement of operating manipulators.

Abstract: Tones of percussion instruments produce different timbres, i.e. different tone waveshapes, depending on the strength of percussion. An automatic rhythm apparatus includes a rhythm tone generating unit which stores the tone waveshape produced from a hard percussion and also that from a soft percussion performed on a same percussion instrument. A rhythm pattern is constructed by rhythmically aligned tone command signals, for various percussion instruments, designating timings and volumes of tones to be produced. At each tone production, these two kinds of waveshapes are read out by mixing them appropriately. That is, when a loud tone is to be reproduced, its waveshape is read out from the waveshape memory for loud tones, while a soft tone is read out likewise from the waveshape memory for soft tones, and a tone of an intermediate volume therebetween is reproduced by reading out the loud tone and the soft tone at a mixing ratio complying to the desired degree of volume.

Abstract: Waveshapes of plural periods for plural channels having characteristics different from each other are stored in a waveshape memory and read out from it when a musical tone is to be produced. Read out waveshapes are respectively weighted by weighting data supplied from a weighting data generator and thereafter a desired tone waveshape is obtained by electrically or acoustically combining these weighted waveshape. As an example, the waveshapes are composed of plural attack waveshapes equal in number to channels and only one sustain waveshape. In this case, the attack portion of the musical tone is formed by the combined one of the attack waveshapes and the sustain portion is formed by the sustain waveshape. This enables the memory capacity of the waveshape memory to be reduced and facilitates the complex tone color control in the attack portion. In another case, each of the waveshapes is composed of an attack portion and a sustain portion, sustain waveshapes forming the sustain portions being matched in phase.

Abstract: An automatic musical accompaniment playing system for use in an electronic musical instrument with an auto rhythm system changes a tone color of accompaniment tones when the state of operation of the auto rhythm system is changed. The automatic accompaniment playing system comprises a tempo clock generator for generating tempo clock pulses having a frequency proportional to a tempo of a rhythm to be generated and a register for storing a flag indicative of a state of operation of the auto rhythm system. The tempo clock pulses are counted by a tempo counter when the auto rhythm system is in operation, and the state of operation of the auto rhythm system is detected in accordance with the state of the flag. A memory stores two groups of tone color data, one of which is selected when the auto rhythm system is in operation, and the other of which is selected when the auto rhythm system is not in operation.

Abstract: A rhythm tone source assigning apparatus for use in an electronic musical instrument comprises a memory having a plurality of storing regions corresponding to a plurality of input operating manipulators each being comprised of a keyboard key or a switch. Arrangement is provided so that by writing a tone source identifying datum corresponding to desired one of a plurality of rhythm tone sources in one of the storing regions corresponding to an input operating manipulator one after another, rhythm tone sources can be assigned to the plurality of input operating manipulators. Thus, this electronic musical instrument greatly facilitates its user of his performing or inputting operations in a hand percussion or a rhythm sequence programming by using these manipulators. That is, for each rhythm, the user is able to obtain his favorite convenient arrangement of operating manipulators.

Abstract: An automatic rhythm performance device of an electronic musical instrument having an expression pedal is constructed of an operation amount detector, a rhythm selector, and a rhythm tone generator. The operation amount detector detects the operation amount of the expression pedal. The rhythm selector selects a rhythm to be performance among a plurality of rhythms. The rhythm tone generator generates rhythm tones which have rhythm patterns determined by the selected rhythm respectively, the number of rhythm tones to be sounded increasing automatically in proportion to the operation amount. This increment of rhythm tones further enriches a musical tone produced by manual performance whose volume is increased by the expression pedal operation.