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updated aubiocut
aubiocut now seeks local minima before the peak, to cut at the beginning of the
attack rather than at an arbitrary three frames ahead of the peak.

--- a/python/aubiocut

+++ b/python/aubiocut

@@ -7,9 +7,10 @@

 from aubio.aubioclass import *

 import sys

+bufsize   = 1024

+hopsize   = bufsize/2

+

 def getonsets(filein,threshold):

-        bufsize   = 1024

-        hopsize   = bufsize/2

         frameread = 0

         filei     = sndfile(filein)

         srate     = filei.samplerate()

@@ -20,20 +21,27 @@

         #newname   = "%s%.8f%s" % ("/tmp/",0.0000000,filein[-4:])

         #fileo     = sndfile(newname,model=filei)

         mylist    = list()

+	ovalist   = [0., 0., 0., 0., 0., 0.]

         while(readsize==hopsize):

                 readsize = filei.read(hopsize,myvec)

                 isonset,val = opick.do(myvec)

+		ovalist.append(val)

+		ovalist.pop(0)

                 if (isonset == 1):

-                    now = (frameread-4)*hopsize/(srate+0.)

-                    #del fileo

-                    #fileo = sndfile("%s%f%s" % ("/tmp/",now,filein[-4:]),model=filei)

-                    mylist.append(now)

+			print frameread

+			i=len(ovalist)-1

+			# find local minima 

+			while ovalist[i-1] < ovalist[i] and i > 0:

+				i -= 1

+                    	now = (frameread-i+1)*hopsize/(srate+0.)

+                    	#del fileo

+                    	#fileo = sndfile("%s%f%s" % ("/tmp/",now,filein[-4:]),model=filei)

+                    	mylist.append(now)

                 #writesize = fileo.write(readsize,myoldvec)

                 frameread += 1

         return mylist

 def cutfile(filein,onsets):

-        hopsize   = 512

         frameread = 0

         readsize  = hopsize 

         filei     = sndfile(filein)