Custom sound for Retroachievements

I'm a big fan of Retroarch and have recently been trying Manic EMU. I just bought the lifetime option because I'm so impressed.

However, with Retroarch you can change the Retroachievement unlock sound to any sound you want. It seems that with Manic, there is no sound when a retroachievement is unlocked.

Please would it be possible to implement our own sound file for achievement unlocks? Thank you

Just for reference, in Retroarch, you open the Files app and navigate to RetroArch > assets > sounds and then you can replace the unlock.ogg file with any sound you want.