Help for my Market survey :)

[Aurélia Azoulay]

Hi everybody !
I am working on a project of iPad/Music and I would need to know:

- how many music groups there are in the world?
By music groups I mean: Orchestras, jazz bands, ensembles, pop music bands - professional and non professional
where are the located ?

- What percentage of them use iPads for music ?

- all the survey about musicians

Do you have links, websites or reports to recommend ?
Many many thanks you will help me a lot!!!!!!!