World-renowned guitarist Jon Hemmersam joins forces with international daf-player Asal Malekzadeh and virtuoso percussionist Dame Evelyn Glennie, CH DBE. Together they combine 7,000 years of Persian musical culture with ancient and new sounds from Scotland and Denmark. Open Barrier is an improvisational album portraying the idea that there are no barricades in improvised music, only an 'open barrier' that allows for music from around the world to come together in any desired form or structure.