Newby Question about iCloud

[asimmd]

Hi All

I want to get a New iPad to use Garageband to compose music.

I then want to upload the music I create onto my PC,and into my
DAW which is Sonar X1D.

The guy at the Apple store seems to think that music saved to iCloud is saved as an MP3,and I could
just download the MP3 file to Sonar on the PC,and carry on from there.

Can anyone please tell me if I write a track in Garageband,and then upload it to iCloud,
what format would it be in.

Thanks

Alan