The BOSS eBand JS-8 is the ultimate jam-along companion for guitarists that facilitates practice and performance with a diverse set of features. As a portable all-in-one audio player, it allows users to load and play audio files in WAV and MP3 formats while offering the flexibility to alter tempo and pitch. With a powerful onboard COSM preamp and an extensive array of over 100 BOSS effects derived from the GT-10, guitarists can enrich their sound in innovative ways. The device includes a Center Cancel feature to diminish pre-recorded guitar or vocal parts for a customized play experience. Additionally, users can record and save their jams, taking advantage of the onboard library of backing tracks and rhythms, as well as built-in tuner and metronome functionalities.