My motto is keep it simple. I have one binder for each language, and I file all the photocopies of songs in each language in the binders alphabetically by title (of song/aria). At the front of each binder I have an evolving table of contents so I can quickly scan to see what I have. The table of contents also lists composer, what opera if any it's from, etc. I also put translations (eg if I've photocopied one from a book or downloaded one off the net) with the songs/arias in this binder.
Additionally, I have some specialty binders based on what I would use the music for - Christmas, wedding, funeral, generic sacred, more than one singer. I do lots of church stuff, so this is helpful for me.
For books, I have them on my bookshelf, not arranged in any particular order at this time since I don't have enough of them to worry about not being able to find something. Individual sheet music (the purchased kind you don't want to put holes through), I put in magazine holders in alphabetical order.
I also am developing a computerized database that has the title, composer, key, if I have a computerized version (I often transpose songs with my notation program), if I have performed it, in which book or binder it is located, etc. Once this is completed, I won't have to look through various books to know if I have the music - I can quickly look up the title, or the composer, or the opera, etc. and will know exactly where to go.
I think the most important considerations in developing a filing system (as someone who used to be a secretary who has created filing systems for several people/companies) are what you will use it for and what is the most likely way you will look things up. If you read through the suggestions so far, we all have our different methods, and they all work for us. But what works for you might be different. I'd suggest starting by writing down how you normally look for music - do you go by specific composer? opera? genre? title? Do you have certain things you do with the music? For example, I sing at funerals, so I have one binder with music appropriate for funerals so I can quickly look through it when I'm asked to suggest something. Also, what format is your music in? Is it mostly photocopies, books? Once you can answer these questions you'll have a better basis for figuring out what will work for you. It doesn't matter if anyone else can find your music, as long as you can!
In response to one of the other vocalisters who mentioned providing her pianists with a binder with all of the music in clear plastic sheet protectors - It's great in theory but here's a cautionary tale: A couple of weeks ago my pianist and I performed impromptu at a fundraiser (and won some theatre tickets :o). She has all of her music in a binder in clear plastic sheet protectors, which in this case was a very bad thing, because the lights reflected off the protectors and she couldn't see much of the music. Fortunately for me, she faked fairly well. She has now removed the sheet protectors and hole punched the music :o).
Jennifer
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