I was curious about the name "glissotar" (less self-explanatory than the in-development glissoflute and glissoboe) but it appears to refer to the Hungarian Tárogató https://en.wikipedia.org/wiki/T%C3%A1rogat%C3%B3

Here's a playlist of songs composed for glissotar: https://www.youtube.com/playlist?list=PLHQMlBq9OKeXINkPCOrLy... (found at https://sonus.foundation/en/page/show/call-for-scores-new-pi...)