Ana S
Google
Lovely music museum containing so many instruments in a chronological order. The main part can be visited during the normal working hours and you can click on the displayed buttons to hear how some of the exhibited instruments sound (a very practical touch).
But you may wish to find out when they offer guided tours, as part of the museum is only open for the public with a guide, which really makes all the difference. We were lucky to catch such a guided tour, and the guide was amazing, took us through all the rooms while playing some of the instruments.
The cafe is not good. If on time, I recommend taking the 15 min stroll towards the fjord and enjoy some good coffee and food at Sponhuset. If you really need a coffee here, don't take the espresso - maybe the Norwegian filter coffee is better. :)