In that post they are talking about commercial stations very slightly speeding up a song to make it fit a time slot. Most of the time when this is done it is almost unnoticeable. Someone mentions pirate stations doing it also, personally I have never heard an HF pirate do it other than as a bit/skit.
If you had a recording it might help a bit to narrow down what is going on. Was this music twice as fast as normal? 50% faster? etc
Also, since your profile does not have a location it might help if you tell people in such a post where you are, that can give folks an idea if they might have a chance to hear the same station you heard. If you are using a remote to hear this mention the location of the remote.
T!
(edit) OK, a possible answer here. Have you ever heard the Firedrake Chinese jammer? Portions of its program can sound "speeded up".
What is scheduled on that freq (16160 kHz) and that time is Sound of Hope out of Taiwan, in Chinese. Mainland China does not like this station and generally jams it using either CHR1 or Firedrake. Firedrake almost always stops at the top of the hour. It generally stays off for 5 to 25 minutes before coming back to jam. I believe that during this time they are confirming that the program they want to jam is on the target frequency, what is called "listen time" in some jamming applications.