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想用c6748的fft库函数处理音频数据，然而音频数据是整数类型的，库函数是处理浮点数的，中间是否需要做一些处理才能使用库函数？库函数的输出也是浮点数，如何输出到耳机？
您有没有fft处理音频的例程啊？可以给发一个吗？我用的omapl138，只用dsp。
