Initial starting points (random):

Cluster 0: 0.500956,1.995918,0.330672,2.991837,SawOsc
Cluster 1: 0.111734,2.997379,0.037972,4.994758,TriOsc
Cluster 2: 0.952587,1.996575,0.877507,2.993151,PulseOsc
Cluster 3: 0.003912,7.027607,0.003831,19.945808,SinOsc
Cluster 4: 0.50249,1.999307,0.333605,2.998614,SawOsc

Missing values globally replaced with mean/mode

Final cluster centroids:
                         Cluster#
Attribute    Full Data          0          1          2          3          4
             (10005.0)   (2001.0)   (2001.0)   (2001.0)   (2001.0)   (2001.0)
=============================================================================
ampl2           0.3802     0.3334     0.1112     0.9511     0.0051        0.5
freq2           5.4805      2.997     2.9969     1.9984    17.4116     1.9984
ampl3           0.2902     0.2001       0.04     0.8728     0.0048     0.3334
freq3            6.671      4.994     4.9938     2.9967    17.3738     2.9967
toosc         PulseOsc     SqrOsc     TriOsc   PulseOsc     SinOsc     SawOsc