QUOTE(Charlie Cello @ Feb 4 2007, 10:32 PM)

Does anyone have any experience of learning the double bass after playing the cello.
Yes, in a sense, but I was never a very good 'cellist, so I didn't have much to change.
QUOTE
I'm considering learning the double bass because our orchestra desperately needs double bass players and the cello section is ok at the moment. How long do you think it would take to get to a reasonable standard on the double bass - so I could play in the orchestra. Are we talking three months? six months? more? Hard work and time isn't a problem and I could easily get a good teacher.
How soon you can play in an orchestra depends partly on your musical skills and partly on the standard required. If you know what a part should sound like just by looking at it, you can join orchestral rehearsals as soon as you can hold the bass, and play in concerts as soon as you can look as if you're playing it even when you are not. You play what you can and fake what you can't play.
Our local amateur orchestra went through a period when I was the only regular bass player. For concerts, invited players and professionals made up the section. I continued to lead the section, even though many of the other players had much better technique, because I knew how the part should sound (especially for Shostakovich 10,* which rather few of us had played before). However, when we played Mahler 1, one of the visitors played the solo, by agreement among her, the conductor and me.
* One of my favourite musical memories is the sound of seven basses playing the quiet opening, the conductor having asked the 'cellos to play quietly enough to let the bass sound through.