MuseScore 3 music notation software is free.

What I think you are talking about is the site to download scores written in MuseScore. I use this a lot and it’s a wonderful resource! My church chamber orchestra is odd instrumentation and I have to arrange and orchestrate everything we play.

You can get music in MIDI or Music XML as well as MuseScore format, along with an MP3. You can post your own too. It’s like Sheet Music Plus in many respects.

There is a free trial. https://musescore.com/


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