In tomodachi life, i tried fixing my audio using the audio emulation LLE (accurate), now it goes to 0 - 4 fps and 100+ frames (Example: 134,53 ms)
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LLE (accurate) is very recent and is still in development, we have to wait for future updates for now that is the standard speed.
Excuse my bad English.
LLE is significantly slower that HLE by design, as ParZival mentioned, it’s new and may need refining. if i’m not mistaken, however, it is likely to always be slower than HLE anyway. your mileage may vary depending on your CPU’s single core performance (can’t attest to multicore, haven’t noticed an improvement in that mode)
I hope they fix it soon