Full detailed sound at 30 - 40 - 50 dB

Note that creating an unusually quiet environment for a baby can condition the baby to not be able to sleep without utter quiet, sometimes not a good thing. I don't imply anyone should expect a baby to sleep through excessive loudness, but I've seen this happen with one of our grandkids…in a largish house everyone having to whisper if the baby's sleeping…actually a first in my wife's and my experience (raised 3 kids between us), and because we're "all knowing" grandparents, our expertise is, of course, unquestionable, although we could be wrong about everything as all kids are different.

Note that creating an unusually quiet environment for a baby can condition the baby to not be able to sleep without utter quiet, sometimes not a good thing.

I recommend a little background Grateful Dead music from time-to-time. The baby will grow older with that much more love in his/her heart.

@wolf_garcia oh don’t worry. This house definitely is not quiet.  :)

@gdhal lots of Prince and Brian Eno love here. :)

Play complicated jazz so the baby becomes smarter.

@leemaze I have also had to be volume conscious and found that a more sensitive speaker and tube amp make a big difference. I can listen at very low volumes and get all the detail and bass. Speakers are tekton di and they do remarkably well at low volumes.
regards,
greg