And plugins are by definition not part of the source. Plus its more than just Drums, its Bass and other instruments so the learning curve is much higher than just a drum solution. Some love it, others like me find its results too fake sounding. But I would note absolutely nothing about being open source prevents one from charging for something. Band-in-a-Box is a 'software arranger': in other words an automatic accompaniment program, today still unsurpassed in ease of use and the musical quality it achieves. Band in the Box has issues, so there is a learning curve and a frustration with how stable it is. If the link you mean is the preview of what MuseScore 4 might look like at some point months down the road, the answer to any question about details is pretty much, we don't know yet, we're still busy inventing it :-). Also creating educational materials, also simply recopying existing music. Composing for sure, also arranging, and also transcribing. There are many, many, many use cases for MuseScore. But these are all things you can do on any score without needing to have used the template. Generally, the most RB-like results would be obtained by starting from the Jazz Lead Sheet template, since this sets up a number of appropriate style settings - to use a handwritten-type font, to make certain lines thicker, add 'wings' to repeats, etc. You can create them as ordinary scores that just happen to have only one staff (maybe splitting into two occasionally to notate a bass line or lother accompaniment or harmony part) and happen to contain chord symbols. MuseScore doesn't have or need a special 'mode' to create lead sheets.

Maybe I'm missing something, it seems like this would be useful. Simply enter chords to a song, choose a style of music, and Band-in-a-Box generates a full band arrangement complete with Bass, Piano, Drums, Guitar, Strings, and more. I'm curious if there's an expectation that the generated harmony would be merged back into the original MS file, so that the melody and harmony would play at the same time. Band-in-a-Box is an intelligent automatic accompaniment and arranging program, which means that you can go from nothing to complete song arrangements in as little as a few seconds. console.log('buffering Harmony '+elt.text+' at ' + currentTick)

I got around this by inserting the following code into the plugin, which seemed to work ok for the charts I've done so far. I ran into an issue that I use a variety of chord symbols such as Ct, F-, E07, etc, that MMA doesn't seem to recognize. I've just started using BandInMuseScore, and was able to get it installed on Windows and working in MS.

What is band in a box