[music-dsp] simple bandpass code ?

[Tebjan Halm]

hi all,

to help a friend for his pre-diploma in design, i implemented a simple
music analysis patch with the graphical language vvvv. we try to detect
beats in low, mid and high frequency bands of a music input.

for now i do FFT on the input with 256 output slices, than i sum up the
desired spectral bands to get three ouput signals.

but i think its a little oversized, isn't it ?

we just have to split the music input in three bands. therefor i think
its faster to have three simple bandpass filters.

we dont need musical quality but speed for realtime. i am just interested in
the energy envelope of the three bands for beatdetection. so can anybody 
link me
to a short code that i can rebuild with vvvv ?

i browsed the music-dsp source code archive, but couldn't find one,
or are they build up with a low and a high pass ?

many thanks and greets,
tebjan