Well, I hope to remedy that here. Basically, what I've done is gone through most of the songs in FE 7 and picked out instruments out of the different maps and combined them into one master map. With this, hopefully, we'll be able to start making midi conversions that sound like they should be in fire emblem. Here's the map:
Just open that in a hex editor and paste it in your ROM pretty much anywhere that's word aligned.
Here are the instruments, with the names of the songs they were pulled from (in case you want to hear an example of said instrument).
For reference, here's the general midi instrument map. If you want your track to be a certain instrument in the above list, you have to make it the instrument of the corresponding number in the below list.
Now, as you can see, the map is really rough right now. Or at least the labeling. Hopefully some of you can clear up some of the specifics on these instruments I was unsure on. Also, if an instrument doesn't work really well with conversion, you can also let me know that too.