How to use the musictheory.voice function in musictheory

scale = musictheory.scale7()
    progsize = rselect((2,3,4,5,6))
    progcount = rselect((1,2,3,4,5))
    csize = wselect({2:5, 3:10, 4:20, 5:10, 6:5})
    bpm = wselect({80:5, 100:10, 120:20, 140:10, 160:5, 180:5})   
    palett = musictheory.palette(scale, progsize, progcount, csize)
    palett._bpm = bpm
    palett.autoProgs()    
    centre = rselect(musictheory.listNotes(inst))
    ncount = wselect(musictheory.chordicCWeights())
    palett._n1.addVoice(inst, centre, "chordic", ncount)  
    
    inst = rselect(ipack("guitars"))
    centre = rselect(musictheory.listNotes(inst))
    ncount = wselect(musictheory.chordicCWeights())
    voic = musictheory.voice(inst, centre, scale, "chordic", 0, 0)
    voic.mimic(palett._n1._voices["chordic"][0])
    palett._n1.addVoiceAsIs(voic)      
    
    inst = rselect(ipack("cellopack"))
    centre = rselect(musictheory.listNotes(inst))
    ncount = wselect(musictheory.chordicCWeights())    
    palett._n1.addVoice(inst, centre, "chordic", ncount)  
    
    play(palett._n1.previewAudio(bpm))    
    print(palett._n1._voices["chordic"][0]._cent)
    print(palett._n1._voices["chordic"][1]._cent)

for inst in pinsts:
        for them in themes:
            centre = rselect(musictheory.listNotes(inst))
            ncount = wselect(musictheory.percussionCWeights())
            them.addVoice(inst, centre, "percussion", ncount)
    for inst in ginsts:
        for them in themes:
            centre = rselect(musictheory.listNotes(inst))
            ncount = wselect(musictheory.genericCWeights())
            them.addVoice(inst, centre, "generic", ncount)    
    for inst in miminsts:
        for them in themes:
            toCopy = rselect(them._voices["chordic"] + them._voices["smelodic"])
            centre = rselect(musictheory.listNotes(inst))
            ncount = wselect(musictheory.chordicCWeights())
            voic = musictheory.voice(inst, centre, scale, "chordic", 0, 0)
            try:
                voic.mimic(toCopy)
                them.addVoiceAsIs(voic)                  
            except:
                print("could not mimic!")
    for t in themes:
        t.shuffleSort()
            
    filezart.makeFolder("../exports/song_" + name)
    palett.infoToFolder(bpm, "../exports/song_" + name)

    print("done with", name)
            
    return palett

print("Qq - Quit")
        inp =  usrinp()
        if inp in "Vv":
            print(path + " > Voice Creation")
            print("Choose the type of the voice you are going to create:")
            typ = requestTypeMenu() 
            if typ == None:
                print("Returning")
            else:
                print(path + " > "+typ+" Voice Creation")
                inst = chooseInstMenu() 
                centre = chooseCentreMenu(musictheory.listNotes(inst))
                mtype = typ
                print("Creating Voice")
                print("...")
                voic = musictheory.voice(inst, centre, theme._scale, mtype)
                voic.autoProg(theme._cprog, theme._progc, theme._csize, 0, None, None)
                print("Your Voice,", voic, ", was created, are you sure you want to add it? Yy Nn")
                while True:
                    inp = usrinp()
                    if inp in "Yy":
                        print("Adding voice")
                        theme.addVoiceAsIs(voic)
                        print("Voice Added")
                        print("Last Voice in its category")
                        print("Last Voice in sorting")
                        break
                    elif inp in "Nn":
                        break
        elif inp in "Ee":
            while True:
                print("Chordic Voices:      ", len(theme._voices["chordic"]))