Occasional audio cracking (intermittent?) + Mortal Kombat II having weird warped controls

[Seiik]

Hey, first off, thank you for this core, it's a pleasure to play and it's running very well so far!

The first game I tried with the core was Chrono Trigger, and as soon as the pendulum showed, I started hearing some small sound cracks here and there. The kind of sound you hear when a sound is too loud for a speaker for example, but still there no matter if the volume is high/low. It wasn't due to any sounds in particular because I was hearing those even in total silence, for example when transitioning from the world map to the fair or the forest. (EDIT: Just attached a video where it did it in a percectly silent moment after rescuing Marle for the first time.)

received_5506292116072811.mp4

I tried a bunch of other games like Turtles in Times, Space Megaforce, Killer Instinct, Castlevania Dracula X, Star Fox, some had very few of these stutters the first minute in, then were totally fine for the rest of the gameplay.

Before reporting it here, I tried Chrono Trigger again, and this time, it sounded perfectly normal, suggesting an intermittent problem maybe? (EDIT: Apparently even if it doesn't do it in the beginning, it seems it can happen later on. I had a two hours Chrono Trigger session and these are coming out randomly.)

I'm using a fairly old 4GB SD cart, so it could be this acting up, therefore I just ordered a new one to try it out and will report back when it. Adam asked to post the issue anyway, so here I am. :)

Another weird thing that happened is that when I tried playing Mortal Kombat II for a first time and my first match's second round ended with me having 3 face buttons mapped as 'block'. When I retried it later on the evening, it didn't do it. So another weird one!

Pocket Firmware: 1.1-beta-3
All the ROMs used on this were dumped from the original cartridges via the COPYSNES application on the Super Nt's latest jailbreak firmware.

Don't hesitate if you have any questions!

[Seiik]

About the sound crackling, I did receive the new SD cart and the problem remains unfortunately.