Thankfully I found this thread as I could not verbalise to anyone around me how the volume changes within the first 4-5 seconds of any song. ~85/90% of my collection is on Apple's Lossless format and even playing a song in AIFF behaves in the same manner.
Bear in mind, these are all songs either ripped from CDs or purchased through Music app. I am not using Apple Music's streaming services whatsoever.
I am running on a MacBook Pro 13-inch 2019 with the following specifications:
MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)
iOS: macOS Monterey Version 12.4
Processor: 2.8 GHz Quad-Core Intel Core i7
Memory: 16 GB 2133 MHz LPDDR3
Startup Disk: Macintosh HD
Graphics: Intel Iris Plus Graphics 655 1536 MB
I am running Apple Music Version 1.2.4.3
I have unchecked and rechecked "Sound Enhancer" and also unchecked/rechecked "Sound Check." I typically do not use "Sound Check" at all as it makes my music collection sound like someone turned on the Dolby Noise Reduction from a sound system from the 1980's (which is not a good thing).
Also, Apple Music used to run through newly imported music and determine the volume level (in decibels). It has ceased to do so within the past week. Is this feature no longer available?
Please advise, anyone.