#68 is cool! A couple things:
1) The waveform is too small/fine and complex, it won't print well at that size. Make it simpler, kind of like this image:
https://si0.twimg.com/profile_images/1877829002/SBT_Logo_2012_Waveform_only.png2) Maybe make the waveform break outside the oval shape a little bit to make it more interesting.
Thanks!