Audio signal processor
First Claim
1. A combined audio processor and sampler comprising:
- an analog input for receiving audio input signals to be processed;
an analog-to-digital converter (ADC) for digitizing the audio input signals received from the analog input into samples;
a two function memory for receiving the samples from the ADC having;
a circulating store having a plurality of sequential locations for temporarily delaying the samples a predetermined amount, anda fixed store having independently addressable locations for storing the samples for playback;
a digital-to-analog converter (DAC) for receiving the samples from the two function memory and converting them to analog output signals;
a processing means for controlling manipulation of the samples, the processing means controlling the predetermined amount of delay imparted by the circulating store and selectively addressing the independently addressable locations in the fixed store; and
,output means under the control of the processing means for selectively combining the audio input signals and the output of the DAC into a final output signal to achieve time delay effects.
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Accused Products
Abstract
An audio signal processor capable of both sampling and audio processing external audio signals is disclosed. The audio signal processor can sample an audio signal and store it in a fixed store in a two function memory for later playback or manipulation. The processor can also audio process external signals in real time by splitting an incoming signal into two parts; processing one part such that it is time delayed and/or pitch shifted, or both, with respect to the unaltered part; and recombining the processed part and the unaltered part to achieve time delay effects such as flanging, chorus and echo. Moreover, the audio signal processor can output samples from the fixed store and real time processed signals simultaneously to achieve complex sound combinations and auditory effects.
34 Citations
23 Claims
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1. A combined audio processor and sampler comprising:
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an analog input for receiving audio input signals to be processed; an analog-to-digital converter (ADC) for digitizing the audio input signals received from the analog input into samples; a two function memory for receiving the samples from the ADC having; a circulating store having a plurality of sequential locations for temporarily delaying the samples a predetermined amount, and a fixed store having independently addressable locations for storing the samples for playback; a digital-to-analog converter (DAC) for receiving the samples from the two function memory and converting them to analog output signals; a processing means for controlling manipulation of the samples, the processing means controlling the predetermined amount of delay imparted by the circulating store and selectively addressing the independently addressable locations in the fixed store; and
,output means under the control of the processing means for selectively combining the audio input signals and the output of the DAC into a final output signal to achieve time delay effects. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An audio processor for imparting time delay effects to audio signals comprising:
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an analog input for receiving audio input signals to be processed; an analog-to-digital converter (ADC) for digitizing the audio input signals received from the analog input into samples at an ADC rate; processing means for controlling manipulation of the samples; a sample clock associated with the ADC for setting the ADC rate; digitally controllable modulation means for selectively producing a plurality of continuous modulation waveforms in accordance with commands received from the processing means and coupled to the sample clock for modulation thereof; a memory for receiving samples from the ADC having a circulating store having a plurality of sequential locations for temporarily delaying the samples a predetermined amount in accordance with commands received from the processing means; a digital-to-analog converter (DAC) for receiving the samples from the memory and converting them to analog output signals; and
,output means under the control of the processing means for selectively combining the audio input signals and the output of the DAC to achieve time delay effects. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A combined audio processor and sampler comprising:
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an analog input for receiving audio input signals to be processed; an analog-to-digital converter (ADC) for digitizing the audio input signals received from the analog input into samples at an ADC rate; processing means for controlling manipulation of the samples; a sample clock associated with the ADC for setting the ADC rate; digitally controllable modulation means for selectively producing a plurality of continuous modulation waveforms in accordance with commands received from the processing means and coupled to the sample clock for modulation thereof; a two function memory for receiving samples from the ADC having; a circulating store having a plurality of sequential locations for temporarily delaying the samples a predetermined amount in accordance with commands received from the processing means, and a fixed store having independently addressable locations for storing the samples for playback, the independently addressable locations being selectively addressable by the processing means; a digital-to-analog converter (DAC) for receiving the samples from the two function memory and converting them to analog output signals; output means under the control of the processing means for selectively combining the audio input signals and the output of the DAC to achieve time delay effects. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification