Abstract
The 3D sound played a very vital role in the development of audio effects. Mentioning 3D sound, people would think of the stereo sound - one way to mislead people’s ears in psychology acoustics - whose function is to make people’s ears feel the position of the sound source, but the 3D sound is more complex than it. The 3D sound is widely used in our life. Thanks to the 3D sound effect, such multi-media equipment as mobile phone, MP3, PDA, could impress people with different audio effect. Now how to develop low cost 3D sound effect processor is a socially difficult task.
The paper focuses on the AT89S51 MCU based on ATMEL Corporation. We use the MCU to control the LM4857 which is produced by the American Nation company to make the 3D sound effect processing and introduce the front 3D sound effect processor manufacture process at details, which has succeeded in 3D sound effect processing and manage to storage the current 3D processing information displayed on the character liquid crystal screen without electricity. This article also introduces the basic application method of KEIL, the popular MCU translates software and the process that the 3D sound effect processor debugs with the hardware debugging and software debugs.
This article first embarks from the 3D sound effect history, and then discusses about the selection of components and the design of hardware electric circuit and software, considering the design of hardware electric circuit and use of the MCU′s I/O. Again software compiles convenience has been considered to save the design cost by reducing the hardware at maximum. Software design has been used in the module -like performance history and increase the software’s operating speed at maximum. Appeared BUG the system the probability to fall has been lowest. The paper gives a detailed introduction in the 3D sound effect processor design manufacture.
Key words: 3D sound; LM4857; save; software
