Just the forks and some pure sine waves of the frequencies we use in our music: 174, 285, 396, 417, 528, 639, 741, 852 and 963 Hz, plus a weighted OM at 136.1 Hz and a 432 Hz sine. Use them for tuning, meditation or layering into your own practice.
Research on sound therapy and 528hz: soundlovealchemy.ca.