Radio 1.FM Otto's Opera House Music you can listen on this page of our site. Station work in genres: Classical. Listen to over 1000 complete and uninterrupted operas from the baroque era to modern days performances. You will be dazzled by the greatest singers and composers. A great collection of operatic music!. Radio 1.FM Otto's Opera House Music has a rating 4.5. Broadcasting country: Switzerland. The station was rated by 9 listeners. Radio 1.FM Otto's Opera House Music you can also listen in the FMCUBE app for Android.