Your brain was likely tired, that is what is really doing the listening. IME many people including myself have rather unrealistic expectations of how frequent one can really "get in the zone" and the duration one can spend there. Our hearing changes quite a bit throughout the day, sometimes by the minute. Some of it is physical, some mental.
I've been mixing music professionally for somewhere around 15 years and I'm frustratingly sensitive to any hearing changes, but I know when my ears are done, sometimes it's after just one song, sometimes it's after 100. One can get themselves caught in analysis mode and that can fatigue you pretty quick regardless of content or playback device. I've long been a proponent of the best upgrade you can do is get good sleep. If my sleep is bad I just forget about working on or listening to music all together and try again tomorrow.
I've been mixing music professionally for somewhere around 15 years and I'm frustratingly sensitive to any hearing changes, but I know when my ears are done, sometimes it's after just one song, sometimes it's after 100. One can get themselves caught in analysis mode and that can fatigue you pretty quick regardless of content or playback device. I've long been a proponent of the best upgrade you can do is get good sleep. If my sleep is bad I just forget about working on or listening to music all together and try again tomorrow.
