I wanted to know which legacy DLC/RBN songs in my library were missing keys, so I went ahead and listened to all of the stems to see. With the help of Linos Melendi, we were able to create this spreadsheet that outlines about 250 songs and specifies whether they do or do not have keys in the actual song. Initially I just made this for my personal use, but I wanted to share it here because it may be helpful to some.
Here's the link: https://drive.google...CLQTwyUZXQlfHsg
As I said before, this is only a list of the songs in my own library, but it puts a pretty significant dent in the legacy DLC list. I tried to be as thorough as I could, but it may be possible that a couple of them are incorrect. If anyone spots a mistake, feel free to let me know so I can correct it. There are also a handful of songs that are blank or have "?" marks. These are songs that I could not figure out for sure, so if anyone wants to lend a hand with those I would be truly grateful. I tried to lean on the side of caution, so if I was unsure, I went ahead and marked it as "yes" (needs keys). I also included a notes section in order to make comments about specific songs.
I know that many songs only have keys/strings/brass/synth for a very short amount of time (Roxanne for example), so I had to establish a bare minimum cut-off point. Basically, if a song only features keys/brass/strings/synth for less than 20 seconds total, I did not count it as needing keys. I know this may be up for debate, but I personally don't think it makes any sense for a player to only have 20 seconds of notes for a 4 minute song. However, any song that is marked as "no" that features any chartable keys has a note that outlines exactly how long it is played for. So for example, "Beck" by E-Pro has about 10 seconds of synth towards the end of the song, so I marked it as "no" with an asterisk and wrote down how long the keys are playing for in the notes section. If anyone has any questions, feel free to ask. Thanks.