Electrical audio signal processing systems and devices – With mixer
Patent
1995-05-22
1998-04-14
Isen, Forester W.
Electrical audio signal processing systems and devices
With mixer
381101, 381103, 381118, H04B 100, G01D 500, H03G 500
Patent
active
057402604
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.
REFERENCES:
patent: 4375776 (1983-03-01), Okamoto
patent: 4677674 (1987-06-01), Snyder
patent: 4781097 (1988-11-01), Uchiyama et al.
patent: 4993073 (1991-02-01), Sparkes
patent: 5054077 (1991-10-01), Suzuki
patent: 5060272 (1991-10-01), Suzuki
patent: 5138926 (1992-08-01), Stier et al.
patent: 5206913 (1993-04-01), Sims
patent: 5208421 (1993-05-01), Lisle et al.
patent: 5212733 (1993-05-01), Devitt et al.
patent: 5227573 (1993-07-01), Nakano
patent: 5260508 (1993-11-01), Bruti et al.
patent: 5291558 (1994-03-01), Ross
That Analog Engine.TM. IC Dynamics Processor, Specifications.sup.1.2, That Corporation (Sep. 30, 1993) pp. 1-8.
Eargle, John, Sound Recording 2d Ed., .COPYRGT. 1980 by Litton Educational Publishing, Inc., pp. 239-244.
Tutorial on MIDI and Music Synthesis, MIDI and Wavetable Synthesis Tutorial, pp. 1-22.
MIDI 1.0 Detailed Specification, Document Version 4.2 Oct. 94, pp. 1-57.
Lancaster, CMOS Cookbook, 1979, pp. 355-356.
Isen Forester W.
Presonus L.L.P.
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