Digital Audio Processing System for Stringed Instruments

Abstract

The invention relates to a digital audio processing method for a string instrument. The system comprises a power supply circuit and a signal processor. An audio input end and an audio output end are arranged on the signal processor. The signal processor comprises an audio digital signal processor DSP, a central processing unit CPU and a front-mounted amplifier. After receiving analog audio signals which are playing sounds of the string instrument and are picked up by the audio input end, the audio digital signal processor DSP converts the analog audio signals into digital signals, then converts back into the analog audio signals and then transmits the analog audio signals to the front-mounted amplifier; after signal amplification is carried out to the analog audio signals, the analog audio signals are output by the audio output end as the playing sounds of the string instrument; the central processing unit CPU is used for storing frequency response curve combinations of various styles; after the audio digital signal processor DSP combines multiple inputs, the audio digital signal processor DSP converts the signals into the analog signals; and the output volume is amplified by the front-mounted amplifier. According to the method, better control and tone adjustment can be realized; the flexibility is higher; and the original sound restoring effect is better.

Description

technical field [0001] The invention relates to an application system for electroacoustic amplification of acoustic stringed instruments and frequency response equalization of acoustic stringed instruments. Background technique [0002] In the 1940s, people created the "electric guitar". The goal is to allow guitar performance to reach a wider audience than the volume of an acoustic guitar can. [0003] The bands that were favored at the time generally consisted of wind instruments and drums, because the acoustics of these instruments (not amplified electronically) were loud enough to be heard by more people at events such as dance parties. [0004] At that time, electroacoustic amplification was still in its infancy. This period is known as the "Big Band Era". [0005] The body (or resonant chamber) of an acoustic guitar is used to amplify the vibrations of the strings, without electrical amplification. However, the sound pressure levels produced by a guitar resonator a...

AI Technical Summary

Problems solved by technology

[0008] The main technical defect is: since the body of the guitar is a resonant cavity, when the volume of the guitar is amplified, the amplified sound will vibrate the cavity, and at the same time, it will be "picked up" by the sensor in the guitar again and re-amplified, and then passed through again. The amplifier system is reproduced, forming a loop, or "feedback" (often called "howling" by performers)

[0016] From the impact of the development of the electroacoustic amplification technology of the above-mentioned acoustic musical instruments, it can be seen that its technical improvement is relatively complicated, and its electroacoustic amplification effect will also be affected by the following factors

[0017] 1. There are many types of acoustic guitars, and the quality varies

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