tf = hasdata(device)
returns logical 1 (true) if there is data
available to read from the mididevice specified by
device. Otherwise, it returns logical 0
(false).
Create a mididevice object to interface with your MIDI device. Query your system for available MIDI devices.
mididevinfo
MIDI devices available:
ID Direction Interface Name
0 output MMSystem 'Microsoft MIDI Mapper'
1 input MMSystem 'nanoKONTROL2'
2 input MMSystem 'USB Uno MIDI Interface'
3 output MMSystem 'Microsoft GS Wavetable Synth'
4 output MMSystem 'nanoKONTROL2'
5 output MMSystem 'USB Uno MIDI Interface'
device = mididevice('USB Uno MIDI Interface')
device =
mididevice connected to
Input: 'USB Uno MIDI Interface' (2)
Output: 'USB Uno MIDI Interface' (5)
As soon as your mididevice object is created, it begins listening for MIDI messages and storing them in a buffer. When you call midireceive, MIDI messages are retrieved from the buffer and returned. You can use hasdata to query whether your mididevice object buffer contains unread MIDI messages.
