mJammer is a WiFi-based wireless MIDI “Jammer-style” control surface for the iPhone/iPod Touch. The scale patterns are very intuitive, and the built-in note guide makes it easy to learn to play! The 52-button keyboard can be configured by a switch on the settings page to play with either the left or right hand. Wikipedia has a great article about this style keyboard, just search for “Jammer Keyboard”. To play, simply touch the buttons. Buttons light up when playing. Multiple buttons may be touched at the same time to play chords. You can slide between the buttons. Touch the ‘?’ icon to show the note names for each button. Touch the MIDI connector icon to show the MIDI parameter control page.
mJammer doesn’t produce any sound on it own, it is designed for controlling hardware or software VST-style MIDI synthesizers via a WiFi connection to a Windows or Mac OS X based computer.
Multiple devices can run mJammer on the same wireless network, each sending messages on its own set of MIDI channels to the hardware or software synthesizer.
While playing, you may also optionally send real-time volume, expression, modulation, or wind controller MIDI messages by tilting the iPhone/iPod Touch to the right or left.
mJammer requires two pieces of software to do its job. The first is the mJammer app itself, running on your iPhone or iPod Touch.
The other is a small free open-source DSWiFiMIDI server application that you run on your PC or Mac before launching mJammer.
The server application receives the MIDI messages from mJammer via WiFi, and sends them along to either an external MIDI interface or a loopback MIDI driver to talk to software synthesizers running on the same computer.
Please read the instructions below for information on downloading and installing the open-source DSMIDIWiFi server application for your system.
For the most reliable performance with the lowest possible latency, I highly recommend that you connect the PC or Mac to the wireless access point that will be used by the iPhone/iPod Touch via a wired ethernet cable rather than use wireless for both the computer and the iPhone/iPod Touch. The computer and wireless gateway that the iPhone/iPod Touch is connected to must be on the same network.
To get the full benefit from mJammer, you should be familiar with the use of MIDI control surfaces, hardware and/or software VST synthesizers.
If you have any concern about the compatibility of mJammer with your own MIDI setup, I recommend first testing with one of the free DSMIDIWiFi-based apps available on the iTunes App Store before purchasing mJammer.