FFt analizer and max content in spectrum var.

Hi.
I am tring to biuld a spectrum monitor with FFT from www.apetech.de.
Could you tell mi what is the maximum content in spectrum variable
after using function  fft_output(bfly_buff, spectrum); from file fft.S

Please reply something, because I don't know german and I don't know
if someone is reading this.

I reali need your help.

Slawek