sentences:  Another source close to Vicarious Visions had reported to "Kotaku" that while "Guitar Hero 7" was in development under an Activision studio, the game was considered a "disaster".The cancelled game omitted the additional instruments and used only a guitar peripheral, redesigning the unit to include a 6-button mechanism replacing the strum bar; the resulting unit was considered too expensive to manufacture and purchase.The developers had also started the game development from scratch to try to create new characters and venues that would be more reactive to the actual songs being played to give the feel of a music video, but ultimately this proved too much of a challenge and had to be scrapped.