But any will be appreciated. In certain states of mind, I really enjoy ultra ultra mellow songs like Ian Matthews “Woodstock”- aural valium like nothing else, but in a good way- “May I” by Kevin Ayers, and the entire Mark-Almond catalog, but can’t think of many others. Any recommedations of similarly mellow tunes would be appreciated.
shame-filled one time bump- anyone? 
Elton John’s entire Tumbleweed Connection album. “Where to Now, St. Peter?”, “Come Down in Time”, and “Love Song” with Leslie Duncan are all especially mellow and beautiful.
http://www.eltonography.com/albums/tumbleweed_connection0.html
Gordon Lightfoot
Loreena McKennitt
The Windham Hill 1981 Sampler. A favorite of mine.
Almost anything by the Carpenters as well. One definition of mellow would be “Karen’s voice”.
Nick Drake works for me.