摘要:
A sound effect imparting device for an electronic musical instrument is capable of imparting a plurality of desired sound effect such as vibrato and reverberation effects to a digital musical tone generated from the electronic musical instrument. The device comprises a digital arithmetic operation unit constructed with a combination of adders, multipliers, delay circuits, etc., a control unit, a parameter memory and a read-out unit.By control data and parameter data which are respectively read out from the control unit and the parameter memory by means of the read-out unit, switching of the operation mode of the digital arithmetic operation unit is controlled in a time-sharing manner, whereby a plurality of sound effects are imparted to a musical tone through digital arithmetic operations.
摘要:
An electronic musical instrument effects the slur on several continuous notes when the slur is selected. The slur performance is detected based on performance information which is generated when performing the keyboard. Then, states of musical tones to be generated are varied from the first note to the last note in the slurred notes in accordance with a line or a curve corresponding to the predetermined musical factor to be detected. Preferably, this musical factor may be the tone color, key-depression intensity, pitch difference between the first note and last note in the slurred notes. Further, it is possible to select desirable one of the preset lines or curves whose data are stored in a memory.
摘要:
In a reverberation tone generating apparatus a digital memory device is used as a delay element. Amplitude data obtained by sampling an input musical tone at a predetermined period are sequentially stored in the digital memory device. The readout of the amplitude data stored before a desired delay time is equal to the readout of the data regarding the input musical tone delayed the desired delay time. By imparting the desired reverberation characteristics to the delayed amplitude data, reverberation tone of the input musical tone is produced. In a modified embodiment, an input musical tone is divided into a plurality of frequency bands and different reverberation characteristics are added to the divided input musical tones respectively. This utilization of the digital memory as the delay element prevents degrading S/N ratio even if the delay time or the reverberation time is elongated and makes it possible to easily change the reverberation time, thereby enabling to generate a reverberation tone having the same quality as a natural reverberation tone.
摘要:
The musical instrument is of a waveform memory device read out type and comprises a frequency information generator for generating a plurality of sets of frequency informations each set consisting of a subplurality of frequency informations and corresponding to each of the tone pitches of the depressed keys in a keyboard, a selector for selecting one, at a time and one after another, of the subplurality of frequency informations generated by the frequency information generator for each one key depressed, an accumulator for repeatedly accumulating the frequency information selected by the selector to produce an increasing accumulated value, a waveform memory device for storing the amplitude values at successive sampling points in one period of a sine wave utilized to form a desired musical waveform, a comparator for comparing the accumulated value with a preset value and controlling the selecting operation of the selector during the operation of the accumulator. The increasing accumulated value is used to address the waveform memory device to read out therefrom amplitude samples to form a desired musical tone wave form. The output of the waveform memory means is imparted with a volume envelope generated by an envelope waveform generator and then produced as a performance tone by a sound system.
摘要:
An envelope shape generation device includes an envelope shape memory storing envelope shape data, a touch information generation circuit for generating touch information, an envelope shape data reading circuit for reading out the envelope shape data prestored in the envelope shape memory in response to the touch information to form an envelope shape signal. The envelope shape reading circuit includes a first envelope reading circuit for reading out a waveform section from an attack portion to a portion immediately before starting of a release envelope shape in response to key-on information and a second envelope shape reading circuit for reading out a release envelope shape following the waveform section read by a first envelope reading circuit in response to key-off information, and a release envelope correction circuit for correcting a head value of the read out release envelope shape to agree with the read out envelope shape value of the first envelope shape section so that the second envelope shape section is connected smoothly to the first envelope shape section.
摘要:
An automatic rhythm performing apparatus capable of producing a rhythmic tone of a plural-tone-source rhythmic musical instrument such as a snare drum comprises a plurality of signal producing devices which produce a plurality of rhythmic tone signals corresponding to the respective tone sources of the single instrument. A control device controls respective signal levels of the rhythmic tone signals and a combining device combined the rhythmic tone signals at signal levels controlled by the control device to provide a combined signal corresponding to the rhythmic tone of the instrument, thereby providing a desired volume relationship of the respective component tones constituting the whole rhythmic tone of the instrument.
摘要:
A musical tone forming system includes a waveform storage device for storing data representative of an attack portion of a musical tone waveform and data representative of part of the other portion of the musical tone waveform following the attack portion. An address device addresses the waveform storage device to first read the data representative of the attack portion and to then repeatedly read the part of the waveform from the waveform storage device to thereby form a musical tone signal. There is provided a device for generating data varying with time. The address device feeds an address data to the waveform storage device in accordance with the time-varying data to randomly designate as a starting address one of those addresses of the waveform storage device storing the data of the part of the waveform, thereby realizing a noisy nature characteristic of a percussion instrument.
摘要:
A signal processor stores at least one microprogram having m steps in total smaller in number than n steps which are to be executed within one sampling repetition period. A count corresponding to each of the n steps are generated. M steps of the at least one microprogram stored is executed a plurality of times within the one sampling repetition period to thereby execute the n steps.
摘要:
A musical tone signal generating apparatus provides at least a waveform memory which stores a plurality of fundamental waveform data based on three-dimensional coordinate address system having three coordinate axes to which respective musical tone control parameters are assigned respectively. The desirable fundamental waveform data is read out at an address corresponding to a coordinate position determined by selecting desirable musical tone control parameters. Then, an interpolation operation is carried out on the fundamental waveform data which are sequentially read out so that an interpolated musical tone waveform signal is formed. The waveform of the interpolated musical tone waveform signal is similar to and intermediate to the waveforms of the fundamental waveform data to be synthesized. Thus, the interpolated musical tone waveform signal is converted into a musical tone signal, by which corresponding musical tone is to be sounded.
摘要:
Address memories storing address data, individually, for respective parameter determining factors (e.g., tone color kind, tone pitch, key touch or other factors) are provided for the respective parameter determining factors. Address data stored in at least one of these address memories is read out in accordance with a combination of the parameter determining factor corresponding to the address memory and data corresponding to at least another parameter determining factor. In other words, plural address memories corresponding to parameter determining factors (designated as first parameter determining factors) are provided with an address memory corresponding to another parameter determining factor (designated as a second parameter determining factor). One address memory is designated by data corresponding to a first parameter determining factor and address data is read out from this address memory in correspondence to the second parameter determining factor. Address data read out from respective address memories are operated by an operation circuit and an address signal corresponding to a combination of plural parameter determining factors is thereby formed. A set of parameters is read out from a parameter memory in response to this address signal.