SoundJam MP is a discontinued MP3 player for classic Mac OS-compatible computers and Rio-compatible hardware synchronization manager that was released in July 1999 and was available until June 2001.

[1] Kincaid created Mac-compatible hardware and device driver support for the Diamond Rio line of digital audio players.

"[5] SoundJam received positive reviews,[6] and won the Best of Macworld award in 1999;[7] it eventually secured 90% of the Mac MP3 software market.

[13][11] Turning instead to Casady & Greene, Apple purchased the rights to the SoundJam MP software in a deal covered by a two-year secrecy clause.

After a request from Robbin and Kincaid, Casady & Greene ceased distribution of SoundJam MP on June 1, 2001.