Echo
代码说明：
dsp上实现的音频经典混响算法,四个梳状滤波加两个全通滤波器实现(dsp audio to achieve the classic reverb algorithms, 4 comb filter plus two all-pass filter to achieve)
文件列表：
Echo
....\5509.h
....\aic23.c
....\audio.c
....\audio.cmd
....\audio.paf
....\audio.pjt
....\c5509.h
....\c55xxdefs.h
....\cc_build_Debug.log
....\clk_init.c
....\Debug
....\.....\aic23.obj
....\.....\audio.map
....\.....\audio.obj
....\.....\audio.out
....\.....\clk_init.obj
....\.....\i2c.obj
....\.....\sdram_init.obj
....\.....\util.obj
....\.....\vectors.obj
....\Debug.lkf
....\Debug.lkv
....\func.h
....\i2c.c
....\ICETEK-VC5509-EDU.h
....\myapp.h
....\readme.txt
....\scancode.h
....\sdram_init.c
....\SY.wks
....\util.c
....\util.h
....\vectors.asm
....\XINT.paf
....\XINT.pjt
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