Wil Initial turbo speedup bootprocess when underclock RP

[TheOldPresbyope]

I noticed that RPi4 doestnt have HW acceleration to decode FLAC.  Is this normal? 

I'm not sure what you are referring to. I wasn't aware that any CPU or SBC supported the FLAC codec algorithms directly. The RPi's ARM CPU does have a hardware floating point unit.

By design, the FLAC decoding algorithm is fast even on slow machines.

Regards,
Kent