Wuilly Arteaga, 23, has orders to report to court every eight days to make sure he is complying with the order, according to the head of the Foro Penal group, Alfredo Romero.
Arteaga was released on Tuesday after being held for 19 days on charges of instigating violence and carrying an incendiary device.
He had become an offbeat regular at the chaotic rallies that have sent shockwaves through Venezuela, as the opposition tries to force early elections to push President Nicolas Maduro out of office.
The violinist was among some 50 people arrested in late July on the second day of a 48-hour strike orchestrated by the opposition against Maduro and his plans to elect an assembly packed with loyalists to rewrite Venezuela's constitution.
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"I can't be free because my country is NOT free and because political prisoners aren't free either. This 'freedom' suffocates," Arteaga wrote on Twitter.
Romero criticized the bail condition and rejected prosecutors' allegations that the violinist carried any weapon.
He slammed an order saying Arteaga could only have a public defender instead of one offered by Foro Penal, and repeated an allegation that the violinist had been tortured while in custody.