I experienced this same thing within the last couple of weeks. We live in AZ and the HVAC unit for the master bedroom and the library/main listening room had not been turned on all winter because we like to "sleep cold" and I'm comfortable in the listening room with a sweatshirt if needed. Unknown to me my wife had turned the thermostat to 68 to just take the chill off. This coincided exactly with the phenomenon you're describing.
All of a sudden the air was much drier and static was much more present. It took a couple of days for me to figure out the connection. As with what you describe the static would build up and be noticeable in the middle of the record. Part of what I discovered was that if I lifted the stylus and cleaned it the effect seemed to be far less. Probably this took the static off the system. I simply rehumidified the library/main listening room and the phenomenon like what you described completely disappeared and all was back to normal.
I don't know where you live but if something like that has gone on in terms your living situation leading to having much dryer rooms and therefore more static it might be a solution for you. Hope this helps.
Happy listening!
All of a sudden the air was much drier and static was much more present. It took a couple of days for me to figure out the connection. As with what you describe the static would build up and be noticeable in the middle of the record. Part of what I discovered was that if I lifted the stylus and cleaned it the effect seemed to be far less. Probably this took the static off the system. I simply rehumidified the library/main listening room and the phenomenon like what you described completely disappeared and all was back to normal.
I don't know where you live but if something like that has gone on in terms your living situation leading to having much dryer rooms and therefore more static it might be a solution for you. Hope this helps.
Happy listening!