A mobile rehearsal room for all singers: From Taylor Swift to the local church choir, singers, like all other musicians, need to practice regularly. However, unless you've just been named "Person of the Year," you might even annoy your neighbors with your vocal exercises. Rehearsal rooms, however, are expensive and rare. The Munich-based startup Vocalisto has come up with a solution that's not only handy and mobile, but also offers various additional features. In an interview, founder Gerd Birzele explains how his mobile rehearsal room works and how he can help amateur musicians in particular to overcome inhibitions. (Photo: Vocalisto)