Complete Timeline of all Casey Kasem Countdown Themes 1970–2009

Every Casey Kasem countdown intro and closing theme from 1970 to 2009, covering American Top 40 (AT40), Casey's Top 40, Casey's Countdown, AT20, and AT10 across ABC Watermark, Westwood One, AMFM, and Premiere Networks. This is a complete historical timeline of Casey Kasem's countdown sound, from the original Moog era through Shuckatoom, Coast to Coast Fanfare, JAM and FirstCom packages, and the final AT10 and AT20 broadcasts. Original Run | Watermark Incorporated / ABC Watermark) | 1970-1988 00:20 — July 25, 1970: Original Moog theme 02:52 — March 3, 1973: Early softened Moog era 05:16 — June 15, 1974: Stable Moog-era opening 07:33 — November 8, 1975: Shuckatoom debut 10:50 — October 7, 1978: Dark disco era, first 4-hour show 12:45 — October 13, 1979: Dark disco intro and closing 14:53 — October 20, 1979: Coast to Coast Fanfare introduced 17:20 — February 20, 1982: Updated Coast to Coast Fanfare 19:40 — April 24, 1982: JAM / ABC Watermark vocal theme 21:17 — January 14, 1984: CCTC synth package debut 24:12 — February 2, 1985: Horn and string remix package 26:35 — June 27, 1987: FirstCom high-energy package 27:30 — 1987–1988: End-of-hour theme 29:03 — 1987–1988: Closing theme Westwood One Years | 1989-1998 30:46 — January 21, 1989: Casey's Top 40 debut theme 34:44 — March 7, 1992: Casey's Countdown debut 38:36 — May 16, 1992: Updated Casey's Top 40 42:31 — November 5, 1994: Casey's Hot 20 debut 46:10 — November 25, 1995: Guitar-driven CT40 update Return of AT40 | AMFM Radio Networks & Premier Radio Networks | 1998 - 2004 49:27 — March 28, 1998: AT40 return (AMFM) 51:38 — March 28, 1998: AT20 introduced 54:07 — March 28, 1998: AT20 HAC introduced 56:31 — November 20, 1999: Second AMFM AT40 theme 59:13 — January 4, 2004: Final Casey-hosted AT40 Later Years - AT10 and AT20 | Premier Radio Networks | 2004 - 2009 1:02:50 — March 10, 2004: First AT10 show 1:05:37 — July 4, 2009: Final AT10 theme 1:08:40 — July 4, 2009: Final Casey Kasem countdown (AT20 HAC) If you grew up listening to these shows or collect radio archives, this is the full evolution in one place. Disclaimer: This video is presented for educational, research, and historical archival purposes only. All audio content remains the property of its respective copyright holders.