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Pocket Midi for the midi piano on Windows

loopMIDI for the virtual MIDI port forwarding, forwarding notes you play in Pocket MIDI to e.g. VirtualMIDISynth

MIDI-OX -> midi devices -> send loopMidi Port 1 and/or Port 2 to Microsoft Wavetable Synth or other software synth

Next >> ability to pipe output to webaudio instead of a midi out

Next >> hook up onscreen keyboard to midi input channel to allow playing of notes directly

Next >> consider last n unique notes rather than last n notes

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loopMIDI - creates virtual Port 1 and Port 2 Pocket MIDI - has keyboard onscreen which can send notes to Port 1 website choooses Port 1 as input and Port 2 as output

Midi Ox - route Port1 to MS Wavetable Synth so that you can hear both of them. Open another software synth e.g. OB-Xd and route Port 2 to that.

d and dsharp over and over then e caused empty array at guessNoteNumber