[PD] Using py/pyext to call Wavesurfer: Problems to get access to dsp

Hello, I wrote the following simple python script to be used by pd with the py/pyext external. It demonstrates a simple tcl/tk dialogue with the wavesurfer application.

try: import pyext except: print "ERROR: This script must be loaded by the PD/Max pyext external"

from Tkinter import * from Wsurf import * import random

class Application(Frame): """This is the TK application class"""

def load(self):
    file = root.tk.eval('snack::getOpenFile')
    ws.openFile(file)

# Some random commands
def stuff(self):
    ws.xscroll('moveto',0.01)
    ws.configure(selection='1.00 3.00')
    ws.configure(title='Test')
    ws.play(1.00,3.00)
    print ws.cget('selection')

# Create interface stuff
def createWidgets(self):
    self.opFile = Button(self, image='snackOpen',

command=self.load ) self.opFile.pack(side='left') self.ran = Button(self, text='Foo', command=self.stuff ) self.ran.pack(side='left')

# Constructor
def __init__(self,cl):
    print 'init called'
    self.extcl = cl
    Frame.__init__(self)
    self.pack(pady=5)
    self.createWidgets()
    pass

# derive class from pyext._class

class myapp(pyext._class): """This class demonstrates how a TCL/TK can be openened from within a pyext external"""

# how many inlets and outlets?
_inlets = 1
_outlets = 1

# Constructor
def __init__(self):
# detach bang method
    self._detach(1)

def bang_1(self):
    self._priority(-3)
    # display the tcl/tk dialog
    global root
    root=Tk()
    root.tk.eval('package require -exact wsurf 1.8')
    global ws
    ws=Wsurf(root,title='ABC',configuration='')
    ws.pack(expand='yes',fill='both')
    f0 = Application(self)
    f0.mainloop()

I can load sound files into the wavesurfer application which also has the functionality to play this file or to record sound input from a microphone. The only problem is that WaveSurfer can not gain access to dsp for writing or reading. Obviously because it is locked by PD.

Does any one see a possibility to, e.g., root the output of the wavesurfer application through PD or some other solution?

Thanks, Jeannette.