Intake depends on the overall SAF manpower needs. When the other
units are sorely lacking then the band gets a few guys, say, maybe
as little as 3 per batch. However when the band has a shortage
they'll get as many as 30. So it all depends on batch to batch,
also whether you're a musician-infested batch, whether you are poly
or JC batch etc.
First of all get yourself selected for the audition about 2 weeks
before your POP. if you entered your ECA as band during sch days
chances are your name will be in the list. Just make sure your OC
doesn't hide the list from you guys. Then, come for audition, play
your best, and pray hard.
I say that because everything really lies with CPC (personnel
control) after that, how many guys they want to post to band or
OCS/SISPEC etc.