My Experience with the ESI Xkey 25 and Xkey 37 MIDI Controllers: An In-Depth Hands-On Review

As a music producer always on the lookout for portable yet powerful gear, I’ve tried various MIDI controllers over the years. But the ESI Xkey series—particularly the Xkey 25 and Xkey 37—has received such high praise for their polyphonic aftertouch, portability, and design that I had to try them both.