SHOWTIMES: 7:30pm and 9:30pm. He started rocking out as a kid, found jazz early and wound up playing in a country band.

Clearly, Jason “Slim” Gambill is not one to be constrained by limitations. Or expectations.

The Nebraska-born, Colorado-raised guitarist is, of course, best known for his 13 years of working with country hitmakers Lady A, a key adjunct in the trio’s rise to multi-platinum, award-winning fame thanks to his hot licks and his trademark two-foot-long braids. But Gambill draws from a deep musical well, and his recent albums — FAKE JAZZ & THEME SONGS, LCD — as well as his buoyant new single “Up” and music that’s to come are the work of someone with endless ambition and no boundaries on his ambitions or imagination.