Q: how do i uninstall iTunes 12.2 and go back to 12.1?

First you need iTunes 12.1 which you will no longer find linked on Apple's web site since who in their right mind would prefer anything except the newest and best?  Apple does not like third party sites providing iTunes downloads (and will get them removed) and you need to be leery of those anyway since there is potential for other things to be installed too.  This, however, is Apple's server -->   https://secure-appldnld.apple.com/itunes12/031-19002.20150409.9C24E/iTunes12.1.2 .dmg

One person said all they did was delete the new application using Terminal commands and install the old one. I wonder about this.  Typically a new version will install things all over the place which only work with the newer version and when you install an older one the installer will complain or fail or at best result in all kinds of errors when you try to run iTunes. 

More typically you have to use special steps and helper applications to run a complete downgrade.

Then you also need old copies of your library files which get irreversibly updated when opened by a newer iTunes.

A general web search for something such as "iTunes downgrade" will uncover detailed instructions.

I would like to uninstall iTunes 12.2 as well -- I can no longer access my playlists in Sonos.  I upgraded only on my macAir which is currently my primarily computer.  I have not yet upgraded my desktop mac to 12.2.   If I managed to uninstall 12.2, couldn't I airdrop the old version of iTunes to my laptop? 

Has anyone tried to uninstall?

Uninstall? Is that something on a Mac?  I use an older OS but I have never heard of uninstall.  Even if it exists I doubt it would work with iTunes which has now become part of the operating system.

iTunes installs many files in many places, some of which require special administrator access. I would be extremely surprised if you could just drop the main application from another computer onto iTunes and have it work (in fact it would require special administrator access to do even that).

iTunes > Preferences > General > disable the Show Apple Music option. It basically hides all the new features of v.12.2.

While there, make sure you did not enable iCloud Music Library. That would explain the slowness, as iTunes is uploading/downloading your library.

Thank you for the response Rysz.  Hopefully that helped jayessemm.  Unfortunately, still no playlists in Sonos.  Any other ideas?

If it is slow because you have a huge library, well, select half of your library and delete it. Problem solved.   Well, that, or disable the feature as Rysz instructed.  Doing things on computers takes a finite amount of time per item and the more you have the longer it takes unless you go out and buy the fastest computer you can.

Can you use Time Machine to restore the older copy before 12.2 was installed?

It wasn't really advice - I was asking. I do use Time Machine, but I don't know if I can restore from the Application folder. I was hoping someone here would know.

I wrote a blog post on this, it's actually not that hard. I used Time Machine but finding the 12.1.2 version of iTunes shouldn't be too hard on your back up system or online

http://audiotexture.blogspot.com.es/2015/07/how-to-downgrade-from-itunes-122-to- 1212.html

I disabled the Show Apple Music option in Preferences, and also did not enable iCloud Music Library. But it still looks like iTunes 12.2, and is not showing me the annotations that I need for my study of music and dance. I will keep trying. Thanks everyone on this thread.