I'll do some further tests on galaxy tab 10.1 and 7.9 soon. So far, I've tested va-beast midi implementation on a nexus 7 v2 and on a galaxy nexus phone using an M-Audio Oxygen Keyboard as well as a Hardware Electribe as external sequencer. Galaxy Nexus: 39ms, Nexus7 v2: 40ms, Galaxy Tab 10.1 v1: 92ms) The latency, audio and midi, strongly depends on your device and Android version (e.g. You can connect external Keyboards, Hardware/Software Sequencers, what ever you up to. To connect an USB compliant device you need an USB 2.0 A Female to Micro B Male Adapter Cable Micro USB Host Mode OTG Cable and optionally, if you want to connect equipment with traditional midi connectors, an USB 2.0 MIDI Interface Cable. To use the USB MIDI connectivity your Android device must support USB Host Mode (most newer devices do, but not all), please check your device specifications for that. G-Stomper VA-Beast supports MIDI over USB. As already mentioned, the VA-Beast supports the connection to external Midi equipment.