BT-2 & BT-4 Bluetooth MIDI Controller

BT-4 is a Bluetooth MIDI foot controller for iPhone and iPad that allows you to control JamUp or other music apps wirelessly.

BT-4 brings the live control solution to iPad®, iPhone® and Mac for just $99. Now guitarists can have a metal case, plug in and play, wireless foot controller at an unprecedented price and experience ultimate tone with the guitar amps and effects in JamUp, BIAS, GarageBand or other compatible applications

Now JamUp users will be able to use BT-4 to toggle between dozens of studio-grade amp and stomp box effects hands free. From toggling amps and effect switches, to switching between presets, controlling Jam Player’s iTunes song playback functions, triggering phrase sampler recording and over-dubbing, and even controlling the built-in metronome or tapping out the tempo, wireless and hands free.


  • Bluetooth MIDI foot controller for iPad and iPhone
  • Solid metal case with 4 assignable foot switches
  • Made for JamUp XT, JamUp Pro XT, GarageBand
  • Send Bank Change, Program Change and Control Changes
  • External expression pedal jack
  • Built-in iOS link for plug and play audio interface
  • Optimized for active/passive pickups for both guitar and bass
  • BT iOS app runs in background on iOS to send MIDI
  • AA x 2 batteries
  • iOS 7 ready

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JamUp, GarageBand, OnSong and more…

Designed for JamUp XT and JamUp Pro XT, the BT-4 foot controller also works perfectly with many music apps. Including* GarageBand, OnSong, AmpliTube, AmpKit and most processing and recording apps.

How it works


Compatible Apps

  • JamUp XT (free), JamUp Pro XT
  • GarageBand, AmpliTube, AmpKit
  • Most Core MIDI apps

Compatible Devices

BT-4 is compatible with iPhone 5s, iPhone 5c, iPhone 5, iPhone 4s, iPod touch 5th generation, iPad Air, iPad 4th generation, iPad 3rd generation and iPad mini. iOS 6.1 or later is required.

BT-4 Technical Specs

  • Connection: Bluetooth 4.0
  • Buttons: 4 buttons
  • Guitar Input: 1/4″ guitar input
  • Line Out: L: mono 1/4″ jack
  • Headphone Output: R: stereo 1/8″ jack
  • Expression Pedal Jack: Yes
  • iOS audio connection: iOS Link 1/8″ jack
  • Battery: AA x 2
  • Size: 280 x 100 x 37 (mm)
  • MIDI messages: Bank Change, Program Change, Control Change

BT-2 Technical Specs

  • Connection: Bluetooth 4.0
  • Buttons: 2 buttons
  • Expression Pedal Jack: Yes
  • Battery: AA x 2
  • Size: 140 x 100 x 37 (mm)
  • MIDI messages: Bank Change, Program Change, Control Change

* All product names used in this webpage are trademarks of their respective owners, which are in no way associated or affiliated with Positive Grid. These trademarks of other manufacturers are used solely to identify the products of those manufacturers are compatible with Positive Grid’s JamUp plug.