With the DT-01 , DTronics introduces hardware Controller for Roland D-05 / D-50 / D-550 that makes all parameters of LAS synthesis (Linear Arithmetic Synth) tangible. With 56 controls and 12 buttons, you have access to all the sound-relevant parameters of the Roland classic and the new edition in the Boutique series: thanks to the INIT button, you can Controller start the new sound with the current settings at the beginning and do this for one or more parts at the same time. Surfing the menu of the D-05/50/550 is Controller finally a thing of the past! By the way, the operation of the many knobs is simply more fun.
The back of the Dtronics DT-01 features MIDI In & Thru and USB. The case itself is made of high quality metal; it is almost the same size as a D-05 and fits on the right, printed surface of the D-50.
It can be a little tricky to set up but it works really well, and editing parameters across the four partials is so time saving and opens this synth up to performance. The manual says not to play keyboard notes through the midi in as there's a risk of stuck notes, but it works fine for me and I can't see what use this would be without that functionality, as you wouldn't be able to hear the synth while editing parameters.