because i can't link the graph to mp3 tech, i will load the curve of spreading function here.
if you are interested the topic, you can go mp3_tech, where there is a topic about
" Is spreading function in lame mp3 wrong"!
please download the attached file which is a graph about mp3 spreading function with different coefficient.
i upload three lines which wholly come from lame sourc code:
green line is to calculating the 10th sub-critical band' masking curve, and the masking comes from all sub-critical bands;
others lines are with same meaning.
red line is for the 9th band
red line and green line come from original source code
blue line comes from modified source code;