I fucking love Smart EQ4. It's everything I'd hoped it would be in an update, as my primary use-case is carving out space in the frequency spectrum for the most important elements. Sometimes I like what the spectral balancing EQ does at the track level, sometimes I don't. Usually only end up using part of the smart filter curve in most instances since it wants to boost irrelevant frequencies (like sub bass on a violin).
The expansion of the groups to 10 tracks is super welcome, as is the ability to customize how the Smart Filters are applied (track only, group + track, group only). I was hoping for group-level dynamic filters, but they're still static. At least the learn time can be a full minute, and the results feel like that makes a big difference versus the old system that listened for 6 seconds.
Here's a 3-way comparison of an old piece where Smart EQ3 was used. The only EQ work done was Smart EQ3 on the 6 section busses (vocals, band, brass, perc, keys, strings). In Smart EQ4 I was able to set up the group with 9 sections (vocals, guitars, bass guitar, drums, brass, timpani, atonal perc, keys, strings).
In the Smart EQ examples, I'm using the fully dynamic/adaptive EQ curves and have not made any manual tweaks (though I'd personally do a few if I were truly redoing this). All tracks in the groups are group + track mode and the only EQ plugins are a few instances of Soothe 2 and Gullfoss.
I recommend comparing clips in 10 second chunks to be able to really hear the difference.
Track without Smart EQ:
View attachment MGS3 OST - Snake Eater (No Smart EQ).mp3
Track with Smart EQ3 on section busses:
View attachment MGS3 OST - Snake Eater (Smart EQ3).mp3
Track with Smart EQ4 on the 9 tracks/busses mentioned above:
View attachment MGS3 OST - Snake Eater (Smart EQ 4).mp3
Track with Smart EQ4 and a mix-bus level EQ matched to the modern pop target:
View attachment MGS3 OST - Snake Eater (Smart EQ 4 with Mix Bus EQ).mp3