Musical tone generation apparatus capable of writing/reading parameters at high speed

• US 5,340,940 A
• Filed: 03/20/1991
• Issued: 08/23/1994
• Est. Priority Date: 03/20/1990
• Status: Expired due to Term

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: Iizuka, Akira, Kawakami, Keiji
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): DONELS, JEFFREY
• Application Number:
  US07/673,129
• Time in Patent Office: 1,252 Days
• Field of Search: 84/600-604, 84/615, 84/618, 84/622, 84/653, 84/656
• US Class Current: 84/622
• CPC Class Codes: G10H 1/06 Circuits for establishing the harmonic content of tones , or other arrangements for changing the tone colour
• CPC Class Codes: G10H 7/00 Instruments in which the tones are synthesised from a data store, e.g. computer organs

Abstract

A musical tone generation apparatus is provided with a plurality of tone generation channels, a first memory for storing musical tone parameter including tone color specifying parameter, i.e., tone color name or number of tone color, in units of the tone generation channels, and a second memory for storing tone color parameter data. When tone color change is designated, the first parameter memory outputs tone color specifying parameter to the second parameter memory. In response to this, the second memory outputs the changed tone color parameter data to the tone generation channels to thereby generate tone having new tone color. As a result, tone color change is easily performed.

Claims

1. A musical tone generation apparatus comprising:

a plurality of tone generation channels for generating musical tones on a time-division basis;

first parameter memory means for storing voice numbers, each of said voice numbers representing a tone color of each of said tone generation channels; and

second parameter memory means for storing tone color control parameters for different tone colors, which parameters can be read out for each time division channel in correspondence with the respective voice number stored in said first parameter memory means;

wherein each of said tone generation channels receives the tone color control parameters read out from said second parameter memory means for the channel, and forms a musical tone according to the parameters.

2. An apparatus according to claim 1, wherein said first parameter memory means stores only said voice numbers.

3. An apparatus according to claim 1, wherein said first parameter memory means stores musical tone formation parameters in addition said voice numbers, and

said tone generation channels form musical tones according to the musical tone formation parameters and the tone color control parameters read out from said second parameter memory means.

4. An apparatus according to claim 1, wherein said first and second parameter memory means comprise a random access memory.

5. A musical tone generation apparatus having time divisional tone generation channels, comprising:

address generating means for generating address data;

first and second parameter memory means for storing parameters for characterizing musical tones to be generated, wherein addresses of said first and second parameter memory means are designated by a first part of said address data;

selecting means for selecting one of said first and second parameter memory means in accordance with a second part of the address data, and for reading out designated parameters from a selected memory means; and

musical tone forming means for receiving the parameter data outputted from said selecting means, and forming sample values constituting a musical tone according to the parameter data.

6. A musical tone generation apparatus according to claim 5 wherein said first part of said address data is upper bits of said address data and said second part of said address data is a lower bit of said address data.