Tania Giannouli studied piano (Soloist Diploma with honours and 2nd Prize), Advanced Theory and Composition (Diploma with distinction and 1st Prize), at the Athenaeum and Orfeion conservatories. Her main area of interest is mixed-media, and she is frequently engaged (both as a performer and composer) in projects that combine music with visuals, text and speech. Her music for theatre, film and video has been performed at festivals, galleries, Biennales and museums throughout the world (notably in Greece, France, Germany, Iran, Romania, Bosnia, Italy, Ukraine, Switzerland, Bulgaria, UK, USA, Egypt, Turkey, Indonesia, Spain, Lithuania, Kenya, Morocco, China, Poland, India, Cuba, Mexico, Israel, Ecuador, Colombia, Chile, Argentina and Brazil). She has collaborated with several award-winning video artists and filmmakers, including Istvan Horkay and Marcantonio Lunardi.
Improvisation plays a major part in her musical life. Tania's compositions have been described as lyrical, inspired, complex, eclectic, and highly original – "intoxicating orchestrations characterised by a European sensibility that evokes the colour of the Mediterranean". Her concert music has also been performed by Camerata/Armonia Atenea String Orchestra, Dissonart Ensemble, the Athens Youth Orchestra, and the Galaxy String Quartet.