Experiment with Midi Keyboard

Comments

• fladd

  October 2018

  Hi Friedrich,

  there is no particular code for recording musical performances, but there is MIDI input and output available as a plugin (see http://stash.expyriment.org). I am not sure what the latencies will be like, though.

  Best,
  Florian

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• platzf

  October 2018

  Hi Florian!

  Thanks for the quick replay. I'm new to Python as well as too expyriment. How can I access/install those plugins you mentioned? Could you give some hints about the code to use for getting midi information of my keyboard?

  Best,
  Friedrich
• platzf

  October 2018

  As my question has been closed in the OpenSesame forum (which was my mistake, excuse me), is there a way to implement a Midi-Input in Sesame? And how would this routine looks like?
  Best,
  Friedrich
• fladd

  October 2018

  Here is a description of the plugin system in Expyriment: http://docs.expyriment.org/Plugins.html.

  You can use the MIDI input like this:

  import expyriment.io.extras
  
  midi_in = expyriment.io.extras.MidiIn(device, buffer_size=1024)
  

  To get a list of MIDI devices on your system, do:

  expyriment.io.extras.MidiIn.get_devices()
  

  To see what you can do with the midi_in object, do:

  help(midi_in)
  

  There are basically two things to look at, read and wait, which do exactly what they sound like. One is reading (polling) from the buffer, returning [status, data1, data2, data3, timestamp], while the other one is waiting (blocking) until a midi command is received and then returns [status, data1, data2, data3].

  I hope this helps.

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• platzf

  October 2018

  Thank you very much. Is it possible to integrate this approach in opensesame? Or is it only possible to implement this Routine in expyriement? If it is possible to include this, how would this be done in opensesame?

  Best,
  Friedrich
• fladd

  October 2018

  Don't know. Best to ask in the OpenSesame forum. Or maybe @sebastiaan can chime in?

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• sebastiaan

  October 2018

  Hi guys,

  Yes, if you use the xpyriment backend in OpenSesame, then you can use all the expyriment routines in an inline_script item.

  • https://osdoc.cogsci.nl/3.2/manual/backends/#xpyriment

  Cheers!
  Sebastiaan

  
  
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• platzf

  March 2019

  Hi!
  I have tried several times to code such an item, with no luck. Hopefully, you can integrate such device-interfaces in a future version – or easier-to-read examples.
  Cheers!
  Friedrich