| 2026-08-31 | Lacking a musical key |
| 2026-01-05 | Lacking a key, in music |
| 2025-04-24 | Like some experimental music |
| 2024-03-20 | Like some music that's challenging to sing |
| 2023-08-20 | Keyless |
| 2021-02-03 | Like much avant-garde music |
| 2020-11-18 | Lacking a key, in music |
| 2020-02-26 | Having no musical key |
| 2018-12-02 | Discordant |
| 2018-11-15 | Keyless |
| 2017-12-14 | Like some avant-garde music |
| 2016-03-16 | Hard-to-hum, in a way |
| 2016-02-20 | Like many Second Viennese School works |
| 2014-05-07 | Lacking in harmony |
| 2014-03-10 | Lacking a key, musically |
| 2014-01-13 | Lacking a key, musically |
| 2013-04-21 | Like some noise music |
| 2013-04-04 | Like the opera "Wozzeck" |
| 2012-06-24 | Like much avant-garde music |
| 2012-05-22 | Hard-to-hum, say |
| 2012-02-26 | Discordant |
| 2011-11-30 | Not in any key |
| 2011-08-27 | Missing a key? |
| 2011-05-11 | Like much Schoenberg music |
| 2010-09-07 | Keyless |
| 2010-04-25 | Like Berg's "Wozzeck" |
| 2010-01-30 | Lacking a signature, say |
| 2009-12-06 | Keyless |
| 2009-04-12 | Lacking a key |
| 2008-10-26 | Like Arnold Schoenberg's music |
| 2007-10-30 | Like some music |
| 2007-01-01 | Like some modern music |
| 2006-05-04 | Lacking a key |
| 2006-02-06 | Hard-to-hum |
| 2005-11-08 | Discordant |
| 2005-09-26 | Lacking a key, in music |
| 2004-03-17 | Lacking a musical key |
| 2004-02-06 | Unkeyed |
| 2003-12-20 | Like much of Webern's work |
| 2003-07-20 | Jarring, musically |
| 2001-07-31 | In no particular key |
| 1998-10-15 | Like some music |
| 1997-07-15 | Like Schoenberg's music |
| 1997-05-08 | Like Alban Berg's music |
| 1996-12-19 | Lacking a musical quality |
| 1996-11-03 | Hardly melodious |
| 1996-06-16 | Not keyed |
| 1995-12-11 | Like much Schoenberg music |
| 1995-05-14 | Unkeyed, musically |
| 1995-04-12 | Like some 20th-century compositions |
| 1995-02-17 | Like Schoenberg's works |
| 1994-12-25 | Without a key |
| 1994-06-10 | Lacking a key |