I bought Heat very much for the sound treating / warming up aspect of it… and boy does it deliver!!
I have been using it on a Roland Fantom, which has nice clarity but it severely lacks balls. The heat makes it sound SOOO much better. It went beyond my expectations of what was possible. It instantly bring back that analog fizzy feel that it is very much missing.
Fantom goes from thin and uninspiring to lush and girthy. Harmonics really glisten and are brought to life and much needed weight is added. It even adds more clarity on top of this if you want… impressive.
The filter is amazing very “warm” and comforting. The EQ is also amazing and very useful.
The only thing I don’t like is the resonance is too much. It can ring even without audio playing WTH! - in headphones this extremely, damagingly piercing!! I wish that could be tamed so you have more control over that knob and it becomes much more useful.