KAT Percussion KTMP1 Multipad Drum and Percussion Pad Bundle with SC-EMMP Electronic Drum Module Mounting Plate

The MIDI plug is for output only, and the only signal it sends is 0x99 (NOTE_ON). None of the control knobs or buttons will produce any MIDI output other than the 4 pads and 2 foot pedals themselves.The USB-D plug can both send and receive, but again, the only MIDI signal it responds to is 0x99 (NOTE_ON).You can indeed trigger the KTMP1 internal sounds from an Android smartphone, but ONLY for the 5 notes that are currently configured onto the 4 pads plus pedal. And unfortunately, the only way to choose those 5 notes is to manually press the up/down "SELECT" buttons on the unit.The 0x99 (NOTE_ON) signal DOES include the velocity volume, but there is no aftertouch, breathing, reverb, or any other parameters either transmitted or received by the KTMP1. Refer to the last page of the 10-page User Manual for a complete "MIDI Implementation Chart". It's not super obvious, but it does spell out that NOTE_ON is the only MIDI capability that KTMP1 can send and receive.Also, be aware that the unit has no memory, so every time you turn it on you have to press buttons several dozen times just to get it going with the sounds you prefer. And if you don't touch it for about 5 minutes, the unit automatically shuts off and loses your settings! Then you have to stop everything and press several dozen button presses all over again, to get the sounds setup again. ENORMOUS PAIN, every time you sit down and turn it on. MIDI control change messages have no effect, so you have to enter your entire sound configuration manually by hand every time you turn it on just to get started.If all your samples and drum sounds are already working on your computer, tablet, or smartphone, then the KTMP1 can trigger those sounds with a simple NOTE_ON message through either USB or MIDI-to-USB cable. Nothing more.