Elektron Video Klub posted this fun jam with his Elektron Digitone connected to an iPad running Koala Sampler. Koala is providing the drums, which the Digitone is sequencing via its class-compliant USB interface.
Elektron Digitone is handling the melodic and bass parts of the performance, with a few percussive elements thrown in as sound locks. But the main drum and percussion parts are coming from an iOS and Android app called Koala. Digitone is controlling and sequencing the Koala App on an iPad with a USB to lightning adapter. The audio from Koala is being sent back via USB Audio and mixed in with the Digitone.
Throughout the video, FX are being manipulated manually in Koala using the iPad App. When new sounds are introduced with Koala, a screen recording will come up to show how the Digitone's internal midi tracks are sequencing Koala.