US 5,056,401 A · Electronic musical instrument having an automatic tonality designating function

Abstract

An electronic musical instrument provides an automatic tonality designating function capable of automatically designating a desirable tonality based on a chord and a rhythm kind which are respectively designated. The chord is designated by simultaneously depressing plural keyboard keys, while desirable one of plural rhythm kinds which are predetermined in advance is designated by the performer. In addition, a desirable mode can be determined based on the designated chord. Based on the mode, chord and rhythm kind, an automatic accompaniment can be performed. Further, this electronic musical instrument can also provide a chord detecting apparatus capable of automatically detecting a desirable chord based on plural notes (or note names) designated by the performer. In such chord detection, an evasive note is automatically omitted from all notes designated by the performer, so that the desirable chord can be detected with accuracy.

Claims35

Dependent claims

An electronic musical instrument having an automatic tonality designating function comprising:

(a) chord designating means for designating a chord;
(b) chord information storing means having plural storing areas which can store plural chord information in a period of time, said chord information storing means replacing the oldest chord information stored therein with another new chord information indicative of the chord which is newly designated by said chord designating means;
(c) judging means for judging whether or not said chord information storing means stores all chord information indicative of plural specific chords each of which is predetermined for each key;
and
(d) tonality data setting means for automatically setting tonality data indicative of a tonality corresponding to said specific chord based on a judgement result of said judging means,
whereby a desirable tonality is automatically designated by said tonality data.

3 more elements

An electronic musical instrument comprising:

(a) chord designating means for designating a chord;
(b) mode determining means for determining a mode in response to the chord designated by said chord designating means;
(c) rhythm designating means for designating a rhythm kind of a rhythm performance to be performed;
(d) accompaniment pattern generating means for generating pitch difference data in response to the mode determined by said mode determining means and the rhythm kind designated by said rhythm designating means, said pitch difference data indicating a pitch difference from a tone pitch of a base note which is preset for the mode, said pitch difference data being outputted in accordance with a rhythm progression;
(e) adding means for adding said pitch difference data with root data indicative of a root of the chord designated by said chord designating means to thereby obtain accompaniment tone data indicative of a tone pitch of an accompaniment tone to be performed;
and
(f) accompaniment tone signal generating means for generating an accompaniment tone signal having the tone pitch indicated by said accompaniment tone data,
whereby an automatic accompaniment is performed in accordance with said accompaniment tone signal.

5 more elements

An electronic musical instrument comprising:

(a) chord designating means for designating a chord;
(b) key designating means for designating a key;
(c) mode determining means for determining a mode in response to the chord designated by said chord designating means and the key designating by said key designating means;
(d) rhythm designating means for designating a rhythm kind of a rhythm performance to be performed;
(e) accompaniment pattern generating means for generating pitch difference data in response to the mode determined by said mode determining means and the rhythm kind designated by said rhythm designating means, said pitch difference data indicating a pitch difference from a tone pitch of a base note which is preset for the mode, said pitch difference data being outputted in accordance with a rhythm progression;
(f) adding means for adding said pitch difference data with root data indicative of a root of the chord designated by said chord designating means to thereby obtain accompaniment tone data indicative of a tone pitch of an accompaniment tone to be performed;
and
(g) accompaniment tone signal generating means for generating an accompaniment tone signal having the tone pitch indicated by said accompaniment tone data,
whereby an automatic accompaniment is performed in accordance with said accompaniment tone signal.

6 more elements

In an electronic musical instrument which inputs plural note name information each indicative of each of note names within a scale so that a chord is to be detected in response to a combination of said plural note name information, said electronic musical instrument comprising:

(a) chord storing means for storing chord information indicative of the chord to be detected;
(b) key designating means for designating a key;
(c) chord extracting means for extracting plural chords each having a root whose note name is designated in response to the combination of said plural note name information to be inputted;
and
(d) chord designating means for newly designating a desirable chord among the plural chords extracted by said chord extracting means based on the key designated by said key designating means and a precedingly designated chord indicated by said chord information stored in said chord storing means, wherein said desirable chord has a predetermined chord progression relation to the precedingly designated chord in the designated key, said chord designating means writing new chord information indicative of said desirable chord into said chord storing means.

2 more elements

(a) chord storing means for storing chord information indicative of the chord to be detected;
(b) key designating means for designating a key;
(c) chord extracting means for extracting plural chords each having a root whose note name is designated in response to the combination of said plural note name information to be inputted;
and
(d) chord designating means for newly designating a desirable chord among the plural chords extracted by said chord extracting means wherein each chord has its own tension degree which is determined in response to the key designated by said key designating means, wherein said tension degree of said desirable chord has a predetermined relation to a tension degree of a precedingly designated chord indicated by said chord information stored in said chord storing means, said chord designating means writing new chord information indicative of said desirable chord into said chord storing means.

2 more elements

An electronic musical instrument having an automatic key designating function comprising:

(a) plural performance members each corresponding to each of plural note names included in a scale;
(b) chord detecting means for detecting a chord in response to a combination of said performance members to be simultaneously operated;
(c) chord information storing means for storing chord information indicative of the chord detected by said chord detecting means;
(d) note name information storing means providing plural storing areas each capable of storing note name information indicative of said note name, said note name information storing means capable of storing plural groups of simultaneously operated note name information, each group of simultaneously operated note name information indicating simultaneously operated note names corresponding to said performance members to be simultaneously operated, said note name information storing means replacing the oldest group of simultaneously operated note name information with the newest group of simultaneously operated note name information;
(e) chord progression detecting means for detecting a predetermined specific chord progression in response to a preceding chord and a current chord, wherein said preceding chord is indicated by said chord information stored in said chord information storing means and said current chord is newly designated by said chord detecting means;
(f) means for determing plural temporary keys based on said specific chord progression detected by said chord progression detecting means and said note name information stored in said note name information storing means, said means then examining whether said note name information storing means stores said note name information concerning said note name adequate to or inadequate to said temporary key;
and
(g) key data setting means for setting key data key data indicative of one of said temporary keys which is selected based on an examination result of said means for determining,
whereby a desirable key is automatically designated by said key data.

6 more elements

Dependencies are inferred from the claim text.

Electronic musical instrument having an automatic tonality designating function

Life of this patent

Electronic musical instrument having an automatic tonality designating function

Life of this patent

Abstract

Claims35