For the next one of these they need to get completely out of their comfort zone. In fact completely out of North America. They should play Gryzor on the Amstrad CPC!
Apparently the GBAs audio problems were a combination of moving from chip tunes to (highly compressed) samples and the GBAs DAC being God awful. You could have put CD quality audio on a GBA cart and it still would have sounded like trash going through that thing.
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