CHRT is a true tube analogue with full MIDI control and unique Natural Synthesis architecture, designed by a saxophonist in search of an instrument with distinct full-bodied and naturally electric sound and expressive experience like an acoustic wind instrument. Though primarily built for a windcontroller, it comes with a keyboard adapter or MIDI implementation version, also inspiring for sequencing (e.g. good bass sounds). The audio path and patch controls are pure tube. The format is 2U 19" or custom. CHRT is open hardware, every instrument hand-made and DIY kits are also available.