Method and apparatus for dynamic reproduction of transient and steady state voices in an electronic musical instrument

In an electronic musical instrument having a greater number of selectively actuable key switches than tone generators to cause the production of sounds corresponding to the notes in a musical scale, an apparatus for reproducing the complete attack transient and steady state portions of a waveform comprising:

• means for detecting the depression and release of a key switch;
• means for storing a complete attack transient of a waveform and a predetermined number of full cycles of the steady state of said waveform, said waveform containing envelope characteristics and being of an harmonically and non-harmonically varying content changing with time;
• means for generating a set of addresses for selectively causing the reading from said storage means each cycle of the attack transient of the waveform and each cycle of the steady state of the waveform, said each cycle comprising a group of amplitude samples;
• means for detecting the completion of the reading of the complete waveform and the continued depression of the key switch for selectively causing the continued reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of the waveform until release of the depressed key switch, said repeated reading of the number of cycles being a recirculation of the steady state portion of the waveform;
• means for generating addresses for selectively causing the continued repeated reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of said waveform during the decay transient of the waveform until audio ceases.

In an electronic organ having a greater number of selectively actuable switches than tone generators to cause the production of sounds corresponding to the respective notes of a musical scale, an apparatus for reproducing the complete attack transient and steady state portions of a waveform comprising:

• means for detecting the depression and release of a key switch;
• means for storing a complete attack transient of a waveform and a predetermined number of full cycles of the steady state of said waveform, said waveform containing envelope characteristics and being of an harmonically and non-harmonically varying content changing with time;
• means for generating addresses for selectively causing the reading from said storage means the complete attack transient of the waveform and the predetermined number of full cycles of the steady state of said waveform, and for generating addresses for selectively causing the repeated reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of said waveform until release of the depressed key switch;
• means for generating addresses for selectively causing the continued repeated reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of said waveform during the decay transient to the waveform until audio ceases.

In an electronic organ having a greater number of selectively actuable switches than tone generators to cause the production of sounds corresponding to the respective notes of a musical scale, an apparatus for reproducing the complete attack transient and steady state portions of a waveform comprising:

• means for detecting the depression and release of a key switch;
• means for storing a complete attack transient of a waveform and a predetermined number of full cycles of the steady state of said waveform, said waveform containing envelope characteristics and being of an harmonically and non-harmonically varying content changing with time;
• means for generating a set of addresses for selectively causing the reading from said storage means each cycle of the attack transient of the waveform and each cycle of the steady state of the waveform, said each cycle comprising a group of amplitude samples;
• means for detecting the completion of the reading of the complete waveform and the continued depression of the key switch for selectively causing the continued reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of the waveform until release of the depressed key switch, said repeated reading of the number of cycles being a recirculation of the steady state portion of the waveform;
• means for generating addresses for selectively causing the continued repeated reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of said waveform during the decay transient of the waveform until audio ceases.

In an electronic musical instrument having a greater number of selectively actuable key switches than tone generators to cause the production of sounds corresponding to the notes in a musical scale, a method for reproducing the complete attack transient and steady state portions of a waveform comprising the steps of:

• detecting the depression and release of a key switch;
• storing a complete attack transient of a waveform and a predetermined number of full cycles of the steady state of said waveform, said waveform containing envelope characteristics and being of an harmonically and non-harmonically varying content changing with time;
• providing means for generating addresses for selectively causing the reading from said storage means the complete attack transient of the waveform and the predetermined number of full cycles of the steady state of said waveform, and for generating addresses for selectively causing the repeated reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of said waveform until release of the depressed key switch;
• providing means for generating addresses for selectively causing the continued repeated reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of said waveform during the decay transient of the waveform until audio ceases.

In an electronic musical instrument having a greater number of selectively actuable key switches than tone generators to cause the production of sounds corresponding to the notes in a musical scale, a method for reproducing the complete attack transient and steady state portions of a waveform comprising the steps of:

• detecting the depression and release of the key switch;
• storing a complete attack transient of a waveform in a predetermined number of full cycles of the steady state of said waveform, said waveform containing envelope characteristics and being of an harmonically and non-harmonically varying content changing with time;
• providing means for generating a set of addresses for selectively causing the reading from said storage means each cycle of the attack transient of the waveform and each cycle of the steady state of the waveform, said each cycle comprising a group of amplitude samples;
• providing means for detecting the completion of the reading of the complete waveform and the continued depression of the key switch for selectively causing the continued reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of the waveform until release of the depressed key switch, said repeated reading of the number of cycles being a recirculation of the steady state portion of the waveform;
• providing means for generating addresses for selectively causing the continued repeated reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of said waveform during the decay transient of the waveform until audio ceases.

In an electronic organ having a greater number of selectively actuable switches than tone generators to cause the production of sounds corresponding to the respective notes of a musical scale, a method for reproducing the complete attack transient and steady state portions of a waveform comprising the steps of:

• detecting the depression and release of a key switch;
• storing a complete attack transient of a waveform and a predetermined number of full cycles of the steady state of said waveform, said waveform containing envelope characteristics and being of an harmonically and non-harmonically varying content changing with time;
• providing means for generating addresses for selectively causing the reading from said storage means the complete attack transient of the waveform and the predetermined number of full cycles of the steady state of said waveform, and for generating addresses for selectively causing the repeated reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of said waveform until release of the depressed key switch;
• providing means for generating addresses for selectively causing the continued repeated reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of said waveform during the decay transient of the waveform until audio ceases.

In an electronic organ having a greater number of selectively actuable switches than tone generators to cause the production of sounds corresponding to the respective notes of a musical scale, a method for reproducing the complete attack transient and steady state portions of a waveform comprising:

• detecting the depression and release of a key switch;
• storing a complete attack transient of a waveform and a predetermined number of full cycles of the steady state of said waveform, said waveform containing envelope characteristics and being of an harmonically and non-harmonically varying content changing with time;
• providing means for generating a set of addresses for selectively causing the reading from said storage means each cycle of the attack transient of the waveform and each cycle of the steady state of the waveform, said each cycle comprising a group of amplitude samples;
• providing means for detecting the completion of the reading of the complete waveform and the continued depression of the key switch for selectively causing the continued reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of the waveform until release of the depressed key switch, said repeated reading of the number of cycles being a recirculation of the steady state portion of the waveform;
• providing means for generating addresses for selectively causing the continued repeated reading from said storage means, either randomly or in a predetermined pattern, a number of cycles of the steady state of said waveform during the decay transient of the waveform until audio ceases.