php.ini is typically your php config file. This would be a file that comes with ones php package and not with music solutions. That file is not located anywhere within the website folders. It would not be in any of the music collection folders, or any where within your htdocs or website files. It is typically located in bin or php folder usually around where your webserver is installed. The exact location depends on how apache and php are installed, if a certain installer was use, and what operation system was used.

If your hosting your own web server then you would want to read the documentation on how to set it up from where you got the files. If you are using a company to host your website, then you should ask them as they will more than likely have the access to the php.ini file to allow those parameters to be changed. Also note that some hosting companies don't allow the default apache and php config files to be changed.

No.
Please read my post carefully. I know what a php.ini is and where......
I´m running my site on a managed Server and by default there is a 2mb maximum upload.
BUT....I can manually add a php.ini with my own settings in every directory i want to. Then this custom php.ini will become activ for that directory!
So if my Server php.ini is only 2MB on upload, i can make a directory and put my own php.ini with for example 40MB. In this Dir the 2MB restriction is off!
As i said...on the Frontend a user can upload 40MB (like it said in my custom php.ini).
But in the Backend i can only upload the default 2MB. So there must be a "trick" to put the custon php.ini in a directory....but i have no idea where.

escuse the stupid question, but.. you have putted that custom php.ini on the ADMINISTRATOR folder as well, right? (not in administrator/components/com_muscol/, but directly on /administrator)

Germi

Yes.
The php.ini is in the admin root.
I wrote to the support from my server. Hope they have a solution.