Yes, but you can in fact just put the song 3 or 4 times in the 1st round and it’ll work.
For example; Ken’s arranged stage music appears like this on the AFS file:
01_A_NYC.adx <— 1st round song IN THE MENU
01_A_NYC_01.adx <-- 1st 10sec. sample of the menu song (from 0" to 10" for example)
01_A_NYC_02.adx <-- 2nd 10 sec. sample of the menu song (from 10" to 20")
02_B_NYC.adx <— 2nd round song IN THE MENU
02_B_NYC_01.adx <-- 1st 10sec. sample of the menu song (from 0" to 10" for example)
02_B_NYC_02.adx <-- 2nd 10 sec. sample of the menu song (from 10" to 20")
03_C_NYC.adx <— 3rd round song IN THE MENU
03_C_NYC_01.adx <-- 1st 10sec. sample of the menu song (from 0" to 10" for example)
03_C_NYC_02.adx <-- 2nd 10 sec. sample of the menu song (from 10" to 20")
If you replace 01_A_NYC.adx / 02_B_NYC.adx / 03_C_NYC.adx with one of your songs, this will only appear in the menu, but you’ll still be hearing the “real” track when playing.
You should replace 01_A_NYC_01.adx & 01_A_NYC_02.adx for in game music.
And I think that’s all you need to do, I also changed 02_B_NYC_01.adx, 02_B_NYC_02.adx, 03_C_NYC_01.adx & 03_C_NYC_02.adx for the 2nd and 3rd round but I don’t think it’s necessary if the new 01_A_NYC_01.adx & 01_A_NYC_02.adx are long enough.
Right now the only stage where the music plays twice is Hugo’s stage because the song I used is 1’10"; but for all the others, the match finishes before the song.
Note that in training mode, you eventually hear a small sample of the real tracks, but this can be avoided by replacing everything with your songs, but you could end up with a game weighing 6 gigas or something