Circuits to process music digitally with high fidelity
The present invention provides a complementary bifurcated circuit to process and optimize music digitally with high fidelity yet with wireless elements. In a particular embodiment, an audio transducer in close proximity to a musical instrument or vocalist's mouth transforms audible music to analog electrical signals, which are digitized and then filtered to remove external noise at the frequencies of alternating current as well as internally generated noise. A FPGA encoder optimizes the signal's latency and formats the signal for wireless transmission, which is then accomplished with a transmitter and receiver. A transmitter control interface programs one or more of the digital encoder, digital processor, FPGA encoder and wireless transmitter. The signal received wirelessly at a remote location is stripped of formatting by a FPGA decoder, corrected to remove nonlinearities in amplification, further optimized for sound latency, and amplified as needed to drive an external audio apparatus such as a loud speaker, mixing board, or professional recording device. A receiver control interface programs one or more of a receiver, FPGA decoder, digital audio CODEC, and digital audio amplifier. The invention is particularly well suited for stringed instruments but is not so limited.
1. A complementary bifurcated circuit to process music digitally with high fidelity, wherein the circuit comprises:
(a) an audio transducer that is located in close proximity to a musical instrument or a vocalist's mouth;
(b) a proximate circuit subset comprising:
(i) an audio digital encoder that is in electronic communication with the audio transducer;
(ii) a digital signal processor that is in electronic communication with the audio digital encoder;
(iii) a field programmable gate array encoder that is in electronic communication with the digital signal processor;
(iv) a wireless transmitter that is in electronic communication with the field programmable gate array encoder; and
(v) a transmitter control interface that comprises a microcontroller and that is in electronic communication with one or more of the audio digital encoder, digital signal processor, field programmable gate array encoder and wireless transmitter;
(c) a remote circuit subset comprising:
(i) a wireless receiver that is in wireless communication with the proximate circuit subset's wireless transmitter along an over-the-air path;
(ii) a field programmable gate array decoder that is in electronic communication with the wireless receiver;
(iii) a digital audio CODEC that is in electronic communication with the field programmable gate array decoder;
(iv) a digital audio amplifier that is in electronic communication with the digital audio CODEC; and
(v) a receiver control interface that comprises a microcontroller and that is in electronic communication with one or more of the wireless receiver, field programmable gate array decoder, digital audio CODEC and digital audio amplifier; and
(d) an external audio apparatus that is in electronic communication with the digital audio amplifier of the remote circuit subset.
2. The complementary bifurcated circuit of claim 1 , wherein the audio transducer is attached to a musical instrument and is configured to transform the instrument's musical sounds to an electrical analog signal, and wherein the audio digital encoder is configured to transform the analog signal to a sampled digital format having a plurality of binary bits suitable for further processing for audio fidelity optimization.
3. The complementary bifurcated circuit of claim 1 , wherein the digital signal processor is programmed to serve as a digital 60 Hz notch filter for a sampled audio digital stream.
4. The complementary bifurcated circuit of claim 1 , wherein the field programmable gate array encoder is programmed to modify a sampled audio digital stream by modifying its sound latency, adding digital timing information, and formatting the digital stream for wireless transmission.
5. The complementary bifurcated circuit of claim 1 , wherein the wireless transmitter is configured to transform a sampled audio digital stream input to a wireless signal for receipt by the wireless receiver with high fidelity.
6. The complementary bifurcated circuit of claim 1 , wherein either the wireless transmitter or wireless receiver may transmit or receive wireless signals.
7. The complementary bifurcated circuit of claim 1 , wherein the field programmable gate array decoder is programmed to modify a sampled audio digital stream by removing its formatting for wireless transmission.
8. The complementary bifurcated circuit of claim 1 , wherein the digital audio CODEC is programmed in one or both of the following ways:
(a) the digital audio CODEC is programmed to modify a sampled audio digital stream's binary audio intensity in specific incremental audio frequency bands, to render the binary audio intensity essentially equal across the entire audio spectrum; or
(b) the digital audio CODEC is programmed to insert a programmed delay in a sampled audio digital stream by routing the stream in a reiterative loop between an electronic output and electronic input of the CODEC until the stream reaches a desired degree of latency.
9. The complementary bifurcated circuit of claim 1 , wherein the digital audio amplifier is programmed to increase the coded sound intensity of a sampled audio digital stream to provide sufficient audio power to drive one or more loud speakers at a desired volume of sound.
10. The complementary bifurcated circuit of claim 1 , wherein one or both of the Transmitter Control Interface and the Receiver Control Interface have microcontroller control parameters that are adjustable by a human operator.
11. The complementary bifurcated circuit of claim 1 , wherein the audio transducer is located in close proximity to a stringed instrument.
12. The complementary bifurcated circuit of claim 1 , wherein the proximate circuit subset is integrated into the construction of an acoustic or electric guitar.
13. The complementary bifurcated circuit of claim 1 , wherein the external audio apparatus is selected from the group consisting of an amplifier, a loudspeaker, a mixing board, a recording device, and head phones.
14. A complementary bifurcated circuit to process music digitally with high fidelity, wherein the circuit comprises:
(a) an audio transducer that is located in close proximity to a performing instrument or a vocalist's mouth, and that is configured to transform audible music into analog electrical signals;
(b) a proximate circuit subset comprising:
(i) an audio digital encoder that is in electronic communication with the audio transducer, and that is configured to transform analog electrical signals into digital electrical signals;
(ii) a digital signal processor that is in electronic communication with the audio digital encoder, and that is programmed to serve as a notch filter for a sampled audio digital stream to sharply attenuate the amplitude of frequency ranges associated with alternating current from power sources and to filter out unwanted internally generated noise from the instrument;
(iii) a field programmable gate array encoder that is in electronic communication with the digital signal processor, and that is programmed to optimize a sampled audio digital stream by modifying its sound latency, adding digital timing information, and formatting the digital stream for wireless transmission;
(iv) a wireless transmitter that is in electronic communication with the field programmable gate array encoder, and that is configured to transform a sampled audio digital stream input to a wireless signal for high fidelity reception by a wireless receiver; and
(v) a transmitter control interface that comprises a microcontroller, and that is in electronic communication with and provides programming and control for each of the audio digital encoder, digital signal processor, field programmable gate array encoder and wireless transmitter;
(c) a remote circuit subset comprising:
(i) a wireless receiver that is in wireless communication with the proximate circuit subset's wireless transmitter along an over-the-air path;
(ii) a field programmable gate array decoder that is in electronic communication with the wireless receiver, and that is programmed to modify a sampled audio digital stream by removing its formatting for wireless transmission;
(iii) a digital audio CODEC that is in electronic communication with the field programmable gate array decoder, and that is programmed in one or both of the following ways:
(A) the digital audio CODEC is programmed to modify a sampled audio digital stream's binary audio intensity in specific incremental audio frequency bands, to render the binary audio intensity essentially equal across the entire audio spectrum; or
(B) the digital audio CODEC is programmed to insert a programmed delay in a sampled audio digital stream by routing the stream in a reiterative loop between an electronic output and electronic input of the CODEC until the stream reaches a desired degree of latency;
(iv) a digital audio amplifier that is in electronic communication with the digital audio CODEC, and that is programmed to increase the coded sound intensity to a level desired for an external audio apparatus that is in line with the remote circuit subset; and
(v) a receiver control interface that comprises a microcontroller, and that is in electronic communication with and provides programming and control for each of the wireless receiver, field programmable gate array decoder, digital audio CODEC and digital audio amplifier; and
(d) an external audio apparatus that is in electronic communication with the digital audio amplifier of the remote circuit subset.
15. The complementary bifurcated circuit of claim 14 , wherein the audio transducer is attached to a musical instrument, and wherein the audio digital encoder is configured to transform the analog signal to a sampled digital format having a plurality of binary bits suitable for further processing for audio fidelity optimization.
16. The complementary bifurcated circuit of claim 14 , wherein the digital signal processor is programmed to serve as a digital 60 Hz notch filter for a sampled audio digital stream.
17. The complementary bifurcated circuit of claim 14 , wherein either the wireless transmitter or wireless receiver may transmit or receive wireless signals.
18. The complementary bifurcated circuit of claim 14 , wherein one or both of the Transmitter Control Interface and the Receiver Control Interface have microcontroller control parameters that are adjustable by a human operator.
19. The complementary bifurcated circuit of claim 14 , wherein the proximate circuit subset is integrated into the construction of an acoustic or electric guitar.
20. The complementary bifurcated circuit of claim 14 , wherein the external audio apparatus is selected from the group consisting of an amplifier, a loudspeaker, a mixing board, headphones, and a recording device.