HDVD stands for “High-Definition Video Discs” and also for “High-Definition Video Download (Including Streaming).” Voices of Music is a non-profit performance project focused on early music (mostly before 1800) based in San Francisco. Their main activity is giving live performances in California. But thanks to co-director David Tayler, they are also taking a lead in making recordings of early music available to all. Their most important recording initiative is to publish YouTube videos, most of which run from 2 to 15 minutes. Typically, a video is devoted to a single piece of music. The musical forces playing range from soloists to complete chamber orchestras. Usually, each video is supported by a donor who underwrites expenses.

Of the YouTube videos published by May 2019, about 100 were in 4K!