Wil Initial turbo speedup bootprocess when underclock RP

[MrHifiTunes]

Here's the official documentation.
https://www.raspberrypi.org/documentatio...locking.md

Thanks for the link.... I read it before but is't confusing.  They talk about overclocking while I want to underclock my PI4 and reduce noise when I play music.   But I also dont want to loose boot up time because of the lower speedlimit of the CPU.

I dont know who has experience in this area...  

 Sometimes I think if its not better to increase the lowest speed of the  CPU.  This way there is enough power to handle music playing and the CPU doenst need to scale up.  The max speed is still there to boot up.   
Very confusing how to set up things.

Im new in these area...no experience...Its my first RP ever and still waiting for my allo boss  (I heard they has issues with the new batch after corona?)  TRUE?

All help is welcome