Super Mario Bros. Deluxe - libretro, crackly audio, pause menu issue

[Bangaio65]

Core Version: 0.14.7 9fd4e30
OS: Windows 7 x64
Game: Super Mario Bros. Deluxe (Japan) (En) (Rev 1) (NP).gbc

The audio is crackly when starting a level. Start 1-1 and you'll notice the first few notes don't sound quite right. May happen at other points but it's definitely more noticeable there. Tried changing audio drivers but made no difference.

There's also a bug on the pause menu. I can trigger it more often when jumping then pressing Start.
Original Mode / Challenge Mode

None of this issues happen with the standalone version (SDL), or with the Gambatte core, or with Gambatte standalone.

[radimerry]

Maybe it's fixed as of 0.15.6. Didn't notice any these problems.

[nfp0]

Does it sound similar to the videos uploaded on these issues?
#161
libretro#85

[Awakened0]

I can hear the crackle when a stage starts after selecting it from the map sometimes with a 0.15.8 core build. It's similar to the crackle mentioned in the other issue reports.

[nfp0]

I can also hear this crackle, even though it's inconsistent.