At this festival music is played with horns, percussions, cellos, talatuts, harps and other instruments – all carved of ice blocks, except for the strings of course. It is amazing how ice musicians manage to find the necessary string on the harp wearing a glove or how they blow into the trumpet and do not stick to the icy instrument. The concert is actually a great improvisation as you can never know for sure which sound the ice instrument will produce, for the quality of ice music depends largely on the temperature. The festival is held annually in late January in the small mountainous village Geilo.