Some tidbits I figured out after working at getting a few customs in:
My chart scrolls too fast/too slow!
Naturally one would use the "Scroll Speed" setting in the RawkSD "Edit Custom" option, but the slightly unintuitive part is that if you want your chart to scroll faster you have to put in a lower number. RawkSD defaults to 2300, so try something like 1800 or 1600. Conversely if you need to slow your chart down, increase it to around 3000.
How come the crowd claps out of time/my characters sway out of time to the music?
These tempos are controlled by the BEAT track in the chart, but RawkSD only puts in a basic beat for you, so chances are it's out of whack. I'm not a programmer so I don't have a way to do this automatically, but you can brute force it with Anvil Studio if you need to. After RawkSD has done its thing, use Anvil Studio, go to the rawkSD\customs\ folder, and find your song's folder. Open up the file titled 'chart' (no extension) inside. Go to the BEAT track and view it in Piano Roll Editor mode. Find where RawkSD has placed a couple of notes. You'll want to remove those notes and put down new ones that actually match up with the tempo of your song. Use C1 for the first beat in a measure and C#1 for subsequent beats, like so:
Use 16th notes and place four per measure. Do that for the entire song. Then reimport your custom onto your SD card - the crowd should now clap in time to the music, and the character animations should be timed better now.
If your time signature is not 4/4, or if there are wild tempo changes, you will have to also alter the notes placed in BEAT accordingly, but I haven't experimented with this yet so I don't want to say concretely what you have to do.
How come my singer stage dives like 7 times during the song?
As the info for RawkSD states, the animation controls are entered completely randomly. This means that animation controls that aren't used that often, like the stage dive, may pop up multiple times during the song. These can be edited again using Anvil. Open up the 'chart' file for your custom as described. This time go to the VENUE track, and choose the Event List mode in the View menu. You should be able to see the animation control events for both lighting and animations. Some of them are rather self-explanatory. In our example, a stage dive is indicated by the comment:
[do_directed_cut directed_stagedive]
If you would rather not your singer stage dived there, if for example it's the very beginning of the song, double click on the event. You can change it to something else. For instance:
[do_directed_cut directed_duo_gb]
will instead change the camera/animation to one of the duo-playing shots of your guitarist and bassist. I don't have a complete list of the possible events, but just look around the other events RawkSD placed. Or, you may be able to take out the event completely. If you look at a "real" RB song (such as a song extracted from a track pack by RawkSD) the real songs tend to have much fewer directed_cut events and several lighting change effects. I'm guessing the game changes the camera randomly until it hits a directed change effect, so you may be able to remove a lot of the directed cut events if you want the animations to vary each time you play it. Not sure how much you can remove though - RawkSD puts in these events for a reason, because without them the songs freeze up in quickplay.
How come my drummer just sits there?
This is the one major thing I haven't figured out yet. Judging from what people figured out for GH customs, I've tried inserting a [play] comment at the beginning of the PART DRUMS track, a [verse] comment in the VENUE track, and [section intro] (for example) comments in the EVENTS track, but I have yet to be able to actually get the drummer to look like they're playing. If anybody has any other guesses/advice on this question I'd love to hear it.
(crossposted to ScoreHero)