Midi to analog sound processor interface
First Claim
1. An audio processing system for processing one or more audio inputs according to one or more parameters, the audio processing system receiving one or more signal processing parameters for one or more audio channels in a digital format and providing the processed version of the audio inputs as audio outputs, the audio processing system comprising:
- a microprocessor for receiving, storing and outputting each of the one or more signal processing parameters for the one or more audio channels, the signal processing parameters being received, stored and output in a digital format;
a converter coupled to said microprocessor and receiving the digital output signal processing parameters, said converter converting each of said digital output signal processing parameters into respective analog parameter signals;
a plurality of parameter conversion circuits coupled to said converter, said parameter conversion circuits modifying each of said analog parameter signals as appropriate for each parameter;
analog signal processors, one analog signal processor for each of the audio channels, said analog signal processors coupled to said conversion circuits to receive said analog parameter signals for the respective audio channel, said analog signal processors processing the audio inputs in accordance with said analog parameter signals and providing the processed audio outputs; and
each analog signal processor receiving a plurality of analog parameter signals generated by a corresponding plurality of said parameter conversion circuits.
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Accused Products
Abstract
An apparatus for automatically recalling audio parameter setup is disclosed. A processor is coupled between a MIDI interface and one or more analog level controlled audio processor channels. The setup parameters, previously entered and stored by the composer in a host computer, are transmitted via the MIDI interface to the processor. The parameters are subsequently converted into an analog signal by a converter. The analog signal is provided to a parameter conversion array which converts the analog signal based on a transformation function. The outputs from the parameter conversion array are provided to one or more analog multiplexers. The outputs of the multiplexers are provided to the control inputs of the analog signal processing channels. Each control input of each analog signal processing channel includes a small capacitor, which in combination with an operational amplifier, forms a sample-and-hold circuit to temporarily store the analog output for the analog processor channels.
During operation, the processor repeatedly scans all channels and provides all parameters for each channel within an allocated time frame. The overall scan rate is fast enough so that the droop in each control input of each analog signal processing channels, as maintained by the small capacitor in the sample-and-hold device, is within one bit resolution of the converter.
201 Citations
20 Claims
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1. An audio processing system for processing one or more audio inputs according to one or more parameters, the audio processing system receiving one or more signal processing parameters for one or more audio channels in a digital format and providing the processed version of the audio inputs as audio outputs, the audio processing system comprising:
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a microprocessor for receiving, storing and outputting each of the one or more signal processing parameters for the one or more audio channels, the signal processing parameters being received, stored and output in a digital format; a converter coupled to said microprocessor and receiving the digital output signal processing parameters, said converter converting each of said digital output signal processing parameters into respective analog parameter signals; a plurality of parameter conversion circuits coupled to said converter, said parameter conversion circuits modifying each of said analog parameter signals as appropriate for each parameter; analog signal processors, one analog signal processor for each of the audio channels, said analog signal processors coupled to said conversion circuits to receive said analog parameter signals for the respective audio channel, said analog signal processors processing the audio inputs in accordance with said analog parameter signals and providing the processed audio outputs; and each analog signal processor receiving a plurality of analog parameter signals generated by a corresponding plurality of said parameter conversion circuits. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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3. An audio processing system for processing one or more audio inputs according to one or more parameters, the audio processing system receiving one or more signal processing parameters for one or more audio channels in a digital format and providing the processed version of the audio inputs as audio outputs, the audio processing system comprising:
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a microprocessor for receiving, storing and outputting each of the one or more signal processing parameters for the one or more audio channels, the signal processing parameters being received, stored and output in a digital format; a converter coupled to said microprocessor and receiving the digital output signal processing parameters, said converter converting each of said digital output signal processing parameters into respective analog parameter signals; analog signal processors, one analog signal processor for each of the audio channels, said analog signal processors coupled to said converter to receive said analog parameter signals for the respective audio channel, said analog signal processors processing the audio inputs in accordance with said analog parameter signals and providing the processed audio outputs; a parameter conversion array coupled between said converter and said analog signal processors, said parameter conversion array modifying each of said analog parameter signals as appropriate for each parameter; and an analog multiplexer array coupled between said parameter conversion array and said analog signal processors, said analog multiplexer array coupling the modified analog parameter signals for each parameter to each of said analog signal processors.
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13. An audio processing system for processing one or more audio inputs according to one or more parameters, the audio processing system receiving one or more signal processing parameters for one or more audio channels in a digital format, the audio processing system having an analog signal processor in each audio channel for processing the audio inputs and providing the processed version of the audio inputs as audio outputs, the audio processing system comprising:
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a microprocessor for receiving, storing and outputting each of the one or more signal processing parameters for one or more audio channels, the signal processing parameters being received, stored and output in a digital format; a converter coupled to said microprocessor and receiving the digital output signal processing parameters, said converter converting each of said digital output signal processing parameters into a respective analog parameter; a parameter conversion array coupled to said converter, said parameter conversion array modifying each of said analog parameter signal as appropriate for each parameter; and an analog multiplexer array coupled between said parameter conversion array and said analog signal processor in each audio channel, said analog multiplexer array coupling the modified analog parameter signals for each parameter to said analog signal processor of each audio channel. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification