John Ro Myung (/ˈmaɪ.əŋ/ MY-əng;[1] born January 24, 1967) is an American bassist and a founding member of progressive metal band Dream Theater.

Myung's favorite bands include the Beatles, Black Sabbath, the Who, Iron Maiden, Rush, Yes, Jethro Tull and Genesis.

[2][3] He cites bassists Geezer Butler, John Entwistle, Chris Squire, Steve Harris, Geddy Lee and Jaco Pastorius as main influences on his playing style.

The StingRay (his main live instrument in that period) was customized with an added front pickup driving a clean bass amp, while the bridge signal was sent to the effects chain.

For the Awake album and tours, Myung used basses produced by a small company formed by former Tobias luthier Nicholas Tung.

The natural-finish Wingbass II was his main live instrument in this period, and all three appear in his "Progressive Bass Concepts" instructional video.

On July 23, 2007, Sterling Ball announced that Myung was moving to Music Man, writing that "John has fallen in love with the prototypes that we made of the Bongo 6 and is now playing them exclusively.

Dream Theater sources report that Myung routinely brings the Stick to the studio and has sometimes made it so far as tracking (the song "Home" from Scenes from a Memory was originally recorded with a Stick, being replaced with a bass guitar for the final version), but it has not appeared on a Dream Theater studio album since Falling into Infinity.

Myung used a fretless bass on the Dream Theater songs "Through Her Eyes", "Far From Heaven", "Hollow Years", "Peruvian Skies", "Hell's Kitchen" and "The Silent Man".