The collection contains 249 cassettes featuring performances either by Mikhashoff or of his music, 801 non-commercial cassettes and 115 commercially-released cassettes that do not contain performances or works by Mikhashoff.

The collection contains 155 reel to reel tapes featuring performances either by Mikhashoff or of his music, 31 reels that do not contain performances or works by Mikhashoff, and 19 reels containing tape parts to accompany performances. Five LP sound recordings and nine compact discs are also included in the collection.

The collection contains thirty-one video and eight audio recordings on video cassettes, most with Yvar Mikhashoff present as performer. One video title is missing, represented only by photocopied leaves of the container.