Walk On is the only Boston album not to feature Brad Delp on lead vocals, and though his presence is sorely missed, the band’s fourth album is a worthy showcase for the talent of Tom Scholz, the band’s resident mastermind. Although he had support from other musicians, Scholz plays every instrument on Walk On, and while some songs lean too much towards studio noodling (“Walkin’ at Night” and “Get Organ-Ized”) others, like “I Need Your Love,” capture the brand of orchestral hard rock that is distinctively Scholz. While Delp doesn’t appear on the album he is credited as co-writer on “Walk On,” the best track here where as replacement singer Fran Cosmo does his best to approximate Delp’s towering vocals, Scholz delivers a track that has enough might to summon the band’s ‘70s heyday. For all the myriad legal and creative battles that dogged Boston for decades, the title track to “Walk On” shows that Tom Scholz still holds a singular vision of rock ’n’ roll splendor.