I “rediscovered” my old German violin that I had not played for years and – inspired by some baroque pieces – tuned it down quite a lot. With the lower pressure this 300 year old violin sounds much more open and full. It is very fun to play although a bit tricky to not choke the sound because of the loose strings.
Here is the video of J.S. Bach’s Andante from the 2nd Sonata for violin solo: