Adverb
By means of an instrument or agency; as means to an end.
With instruments of music; as, a song instrumentally accompanied.
Source: Webster's dictionaryIndustry was regarded entirely instrumentally by party, state and military, in terms of its ability to provide the sinews of war... The business community was characterized by a defensive opportunism in the face of state power. Richard Overy
You cannot dance without music though you can sing instrumentally without dancing. African Proverb
Instrumentally, the band favors the reverb of SoCal surf-rock and the buzzsaw distortion of early Nirvana, with Preston's airy, psychedelic-tinged vocals floating somewhere up above. Source: Internet
Some of his chansons were doubtless designed to be performed instrumentally. Source: Internet
Sacred music, both a capella and instrumentally accompanied, is at the heart of the tradition. Source: Internet
Other times the issue is avoided by having the performer(s) play the anthem instrumentally instead of singing it. Source: Internet