I have read in some of the replies here that the half size double bass are only for middle aged school kids.
Well I am afraid to tell you nothing can be further from the truth. My cello teacher, who is a well rounded musician and well known in Atlanta plays a half bass.(She has been playing cello, bass, viola da gamba etc for 50 years). I am only 5 feet tall and a 3/4 would be quite a challenge for me to play!
A half bass instrument is no novel thing. You can have a bad 3/4 just like you would any sized instrument. Any questions!!
