1 Apple ID only for music, 1 Apple ID for iCloud

Question

Am I doing it right?
Dear All,
I keep all my music on a Mac Mini directly linked to a Weiss Converter and to my Burmester. I would like to maintain everything sync on iCloud, nevertheless, I would like to purchase music under a separate Apple ID as you can't stay logged into the store and I don't want to disclose my PW to whom downloads music from the iTunes at home. Currently I had 1 Apple ID and Music Match.
Steps that I took:
Created a new Apple ID which I used as iTune store account. DO I HAVE TO CREATE A NEW iTUNES MATCH OR CAN I TRANSFER IT FROM THE APLE ID THAT I USE AS ICLOUD?
I changed only the music preferences on my iPad and iPhone inserting the new Apple ID. DOES THIS ALLOW ME, WHEN I PURCHASE MUSIC EITHER AT HOME OR VIA IPHONE OR IPAD, TO HAVE IT AUTOMATICALLY DOWNLOADED IN MY HOME MAC?
WHAT HAPPENS TO THE ALREADY PURCHASED MUSIC? IF I ACTIVATE A NEW MUSIC MATCH ON THE NEW APPLE ID, WILL THIS AUTOMATICALLY CONSIDER THE WHOLE LIBRARY THAT I ALREADY HAD PLUS THE NEW MUSIC DOWNLOADED? IF I WANT TO HAVE THIS MUSIC ALSO ON MY MACBOOK RETINA, WHO SHOULD IPROCEED? ALSO USE THE NEW APPLE ID AND IT GOES AUTOMATICALLY? DO I THEN HAVE TO AUTHORIZE THE MACBOOK RETINA WITH 1 OF THE 5 AUTHORISATIONS WHICH ARE MADE AVAILABLE?
WILL THE PREVIOUS MUSIC STAY IN MY IPHONE/IPAD LIBRARY WHEN I CHANGE ID?
WHAT HAPPENS WHEN I PLUG THE IPHONE INTO MY RETINA? SHOULD I DISABLE MUSIC SYNC/ICLOUD MUSIC SYNC BECAUSE IT GETS THE MUSIC THROUGH THE NEW APPLE ID AUTOMATIC DOWNLOAD/ MUSIC MATCH?
CAN I RESIGN THE MUSIC MATCH FOR THE ICLOUD APPLE ID?
Thank you all for your help in sharing experiences

Answer 1

You have to delete the existing iCloud account, then set up a new one with a different ID.  To do this and migrate your data to a new account, first decide which device(s) will be changing accounts and which will be keeping the existing account.  On the one(s) that will be changing, if there any photos in photo stream that are not in the camera roll that you want to keep on the device you'll need to save these to the camera roll first, by opening the photo stream album in the thumbnail view, tapping Edit, then tap all the photos you want to save, tap Share and tap Save to Camera Roll. 
Once this is done, one each device that will be changing accounts, go to Settings>iCloud, scroll to the bottom and tap Delete Account.  (This will only delete the account from this device, not from iCloud.  The device(s) that will be keeping the account will not be effected by this.)  When prompted about what to do with the iCloud data, be sure to select Keep On iPhone.  Next, set up a new iCloud account using a different Apple ID (if you don't have one, tap Get a Free Apple ID at the bottom).  Then turn iCloud data syncing for contacts, etc. back to On, and when prompted about merging with iCloud, choose Merge.  This will upload the data to the new account.
When you're finished migrating the device(s) to the new account(s), if you have any merged data that you don't want on your device(s) you will then have to go to icloud.com on your computer and sign into each iCloud account separately and manually delete the data you don't want (such as deleting the other device's contacts from your account, and vice versa).