Mix together spring sunshine, grass and jazz in equal proportions and you’ve got the magic combination for Purdue Bands’ annual Jazz on the Hill concert, 2 p.m. Sunday, April 29, at Slayter Center, on the corner of Stadium and Jischke Drive, West Lafayette.

Admission is free. Blankets and lawn chairs encouraged for comfortable seating.

With five student bands – the Purdue Jazz Band, American Music Repertory Ensemble, Lab Jazz Band, Concert Jazz Band and Studio Jazz Band – as well as the Chameleon Reunion Band, there will be jazz for every taste.

Director Mo Trout expects the music to be continuous for three hours and encourages people to come and go.

For fans who want to hear certain bands, the Jazz on the Hill schedule is: Studio Jazz Band, 2 p.m.; Concert Jazz Band, 2:30 p.m.; Chameleon, 3 p.m.; Lab Band, 3:30 p.m.; American Music Repertory Ensemble, 4 p.m.; Purdue Jazz Band, 4:30 p.m.

Chameleon is a jazz band with Purdue roots dating back to the 1970s. Besides Jazz on the Hill, it will reunite for an 8 p.m. performance Saturday, April 28, at The Muse on Columbia Street across from the Tippecanoe County Courthouse in downtown Lafayette.

In 2011, the band reunited for the first time in 33 years before a large crowd at The Muse. Due to the success of the event, they’re back to play the sounds of the 70s and to re-live their Purdue days when they played for fraternities, sororities, high schools and other organizations from 1974 through 1978. The group played at the Indiana State Fair and performed as the house band for the televised Indiana State Fair Variety Show, starring Nick Clooney, the father of George Clooney. They also opened for The Spinners.

Chameleon is led by Grammy Award winner, and Purdue graduate, Jim Yukich,

and features Lafayette area natives Mary Beth Ellis - Weckerlin, Jane Ellis Anderson, Rick Green, Connie Morre Chalko, Dave “Smitty” Smith and Suzi Smith. The band includes keyboards, bass, drums, guitar, three trumpets, a sax, a trombone and male and female lead vocalists, as well as background vocalists.

On Saturday, the band will play two sets. Admission is free, although donations for the Purdue Jazz Department, where all the band’s members studied, rehearsed and performed) will be collected at the door.