K-0_0_1_1_1_1_1_0.wav
K-0_0_1_1_1_1_1_1.wav
K-0_1_0_0_0_0_0_0.wav
K-0_1_0_0_0_0_0_1.wav
K-0_1_0_0_0_0_1_0.wav
K-0_0_0_0_0_0_0_2.wav
K-0_0_0_0_0_0_0_3.wav
K-0_0_0_0_0_0_1_2.wav

rm -- *[23]*

rm K*[23]*.wav

rm -i K*[23]*.wav

rm *2* *3*

find . -type f -iname "*[32]*.wav" -delete

find -maxdepth 1 -type f -iname "*[23]*".wav -delete