Hi there - I have a couple of questions I'd like to ask, as I'm taking up the double bass, but am a bit worried about it. Here is the question/problem. I'm now 17, and I've played violin since I was 5 years old, so I'm quite good now, musical theory is fine and my technique is good too. I've only ever been classically-trained in the technique and type of music I've played. Now, though, I want to play double bass, as my friends have a small jazz band and they want one. So I'm planning on taking lessons on the double bass, and I'm extremely motivated to learn, so I will practise 3 or 4 hours a day. The question is whether or not having learnt classical violin for 12 years will make it harder to learn jazz on the double bass? Is learning double bass after violin a problem in itself? And also, how long, with lessons and motivated practice, should it take to really start to get good? When I learnt guitar, It took me a while to get anywhere at the beginning, but then I started to improve rapidly; is the double bass similar? Thanks a lot in advance, and sorry for the long-winded question.