This week´s VGBA-Android 3.9.43 release fixes a big bunch of bugs many users complained about:

https://play.google.com/store/apps/details?id=com.fms.vgba

The sound echoes are now gone, and the app should no longer try checking the license on each run. I have fixed glitches in four games: Breath of Fire 2, Prisoner of Azkaban, Golden Sun, and Fire Emblem: The Sacred Stones. Finally, Ghouls and Ghosts and Megaman Battle Network 5 have been added to the Cheatopedia.

What´s in this version:

• Removed echo and lowered sound latency.
  
• Added buffered DMA source/destination registers (Breath of Fire 2).
  
• Stopped enforcing compression types in BIOS (Prisoner of Azkaban).
  
• Now properly mirroring writes to OAM and PRAM (Golden Sun).
  
• Made CPUSet() BIOS routine verify source address (Fire Emblem).
  
• Fixed licensing check problem where app tried checking license on every run.
  
• Added Super Ghouls ´n Ghosts and Megaman Battle Network 5 to the Cheatopedia.
  
• Fixed sound after restore