iPhone Screenshots


MIDIKeys is a MIDI piano keyboard control surface for the iPhone .

MIDIKeys doesn't produce any sound on its own, it is for playing hardware or software VST-style MIDI synthesizers via MIDI hardware interfaces connected to the iPhone dock connector or virtual MIDI instruments like IK Multimedia SampleTank® for iOS or ThumbJam running in the background on your iPhone.

The entire range may be transposed up or down up to one octave in semitone increments using the "Transpose (semitones)" slider on the settings page or shifted a full octave (up to the two octave limit) by touching the 8va -/+ buttons on the main screen.

Both fixed or variable note MIDI Note On event velocity based on touch position within the key are available as options on the settings page.

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.

Set the transmit channel using the MIDI Channel slider. Any channel from 1-16 may be selected. Channel 1 is the default.

Choose between "Omni" sending MIDI data to all CoreMIDI apps or "Virtual Port" sending to a named CoreMIDI virtual output port. When the "Virtual Port option is selected, MIDIKeys will show up as an input option labeled "MIDIKeys" in apps that support virtual ports like Sonosaurus ThumbJam and MIDIBridge. "Omni" mode is selected by default.

If you want to transpose the pitches being sent out, you may set a transpose value up to +/- one octaves in semitone increments on the Transpose (semitones) slider. No transpose is the default.

Note-on events may be sent with either a fixed or variable velocity based on where you touch on the key. Set the maximum velocity using the Velocity slider. Any value from 0-127 may be selected. Default value is 100.

Select between fixed or variable velocity mapped to the touch position using the selector. When the velocity is mapped to touch, the minimum velocity is approximately 20% of the value set on the Velocity slider and the max is 100% of the value. Touching lower or higher on the key (area below the black keys only for the white keys) results in lower or higher velocity values sent in the MIDI Note On event for the key.

MIDIKeys can send Volume, Expression, Modulation, or Breath Control message by tilting the device to the right or left.

Select a controller on the Tilt Controller selector. Default is no controller messages.

When a controller is enabled, tilting the device to the right or left will send the selected controller messages to the external device. Values increase as the device is tilted farther to the right.

You may set the tilt sensitivity using the Tilt Sensitivity slider. The range is from 1 to 4, with higher values being more sensitive. Default value is 1.5.

If you ever have "stuck" notes, you may touch the "Shhh" icon on the main screen to send a MIDI "All Notes Off" message and stop the sounds.

All settings are saved when exiting MIDIKeys and restored the next time it is run.

What's New

Version 3.0.1

Minor bug fixes.

Ratings and Reviews

The seller is extremely responsive.


Ok. It happens that when i press one key it responds like i was pressing it twice. But the seller is extremely responsive and is trying to resolve this issue and for that i'll raise my other review. My setup is correct ( i had followed the instruction on the website). I'll try to resolve this.

Uptdate: Ok, i think i got it. I restored one iphone and choose to start as if were a new iphone (without restoring it from a backup) and it worked... Before that my iphones were restored directly from a 3x backup to the new 4.0 ios. I think it is somehow related... I only wish that i could chose the size of the keys 'cause i think they're kind small ( just like the other guy that had reviewed MIDIkeys)

thanks for the help.

Really fast, surprisingly useful


This app is surprisingly fast and useful. I use Sibelius 6 music notation software, and the notes are instantly entered into the score when I touch them in MIDIKeys. I was worried the notes would be too close together, but it is very accurate; I rarely press the wrong key. Computer setup was easy; I downloaded the software, ran it, and it appeared as a MIDI controller in Sibelius's input options. I am already entering notes faster with this than with the qwerty keyboard input option in Sibelius, and since I always carry my phone with me, I can use this instead of a portable MIDI keyboard for traveling. The developer is very responsive.

Problems with............latency

Tyranny of Dave

Would be exactly what I'm looking for to use to work on parts away from my keyboard except latency issues make it near useless. Was trying to plot out a simple drum part in Logic but near random latency from note to note made it difficult to get anything done. Sigh. Won't someone just make a simple wireless MIDI controller that works?


Michael Eskin
4.7 MB
Requires iOS 7.1 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2016 Michael Eskin


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