Creating a kind of "remote control" for Tempest is simply not possible... It does not have the necessary MIDI control for this.
The main lack is in realtime controllers like CC's... There are simply not enough of these, and those that are there only allow for control of the few beat wide parameters... The sliders do not even send out CC'S!
The only way to control all the data are by SysEx, and here it gets even worse. Only the currently selected sound can be dumped to Tempest, but not requested. Same goes for the current beat, but beats are packed data even beyond the usual SysEx packing scheme, so you would need special software to unpack these and obtain the algorithm from Sequential... Projects are the same, and the sheer size of such a dump is huge.
So forget about ever seeing any editors that will remote control Tempest, it will not happen. The best you will see is a sound editor as this data type is the only one not packed, and even these will be crippled since you cannot dump the sound to any of a beats 16 sounds chosen from the editor... It will allways dump to the currently selected sound you have initialized by pressing the appropriate pad. Also, you cannot change any beat parameters from that editor, so all of those must be changed on the interface.
I have made an editor for sounds using the old Soundiver program from Emagic, but it suffers under all these things I just mentioned, but it does ease the creation of single drumsounds though... Also, any such editor has to dump all single parameter changes as one whole sound as there are no SysEx or CC for changing single parameters... Luckily this is not a problem thru USB because it is very fast, but this will not work using MIDI DIN ... The Tempest has a critical SysEx bug in its MIDI DIN code that DSI decided not to fix when i reported it years back now.
MIDI implementation in Tempest is in my opinion one of its worst design flaws of all second only to user sample support.
I know this is not what people want to hear, but its the truth... You just have to let that sink in, and enjoy what IS there 🙂