###Web MIDI Synth Host This is a Web MIDI application, written in HTML5 and Javascript. It can be tried out at
http://james-ingram-act-two.de/open-source/WebMIDISynthHost/host.html

This project is unofficial, but is intended to further the discussion about software synths at Web MIDI API issue 124.
It can also be used to develope any new Web MIDI Synth [1] without having to create a GUI:

1. clone this project
2. create a new directory, at the top level of the project, for the new synth's files
3. create a file that describes the new synth's interface using one the existing top-level files [2] as a model.
4. implement the interface, and include the synth's file(s) at the bottom of the host.html file

Web MIDI synths (including the resident synthesizers) can easily be lifted out of this host and used in other Web applications that work "out-of-the-box". There are some simple applications, demonstrating how this can be done at:
SimpleSoundFontSynthHost, (GitHub), SimpleMIDISynthHost, (GitHub) and SimpleMIDISynthHost2, (GitHub)

####Resident Synthesizers:

• Sf2Synth1
  This is almost entirely gree's sf2synth.js synthesizer, but I have changed both the soundFont and synthesizer code so that soundFonts can be cached and changed at runtime.
• consoleSf2Synth
  This is a minimal synth that simply echoes the messages it receives to the console without producing sound. It could be used as a stub when writing a new synthesizer.
• MIDI synth (Chris Wilson)
  This is Chris' MIDI synth without its original GUI. I have tried to keep closely to the code in the original files while using simple MIDI controls whose values are in the range 0..127. It would, of course, be possible to get nearer to the original settings by using hi- and lo-byte controllers (as standard MIDI does).
• monosynth (Chris Wilson) A very simple synth. The original is here.
  

####Remarks:

1. The soundFonts directory has been seeded with .sf2 files created from the Arachno soundfont using the Viena soundfont editor. Any soundFont can, of course, be used.
   
2. There are 3 types of issue that can arise:
   • Issues relating to the WebMIDISynth API should be raised here in this repository.
   • Issues relating to my version of Chris' MIDI synth (cwMIDISynth) should be raised in the SimpleMIDISynthHost repository.
   • Issues relating to my version of the gree sf2Synth.js (sf2Synth1) should be raised in the SimpleSoundFontSynthHost repository.

I am not a Web Audio specialist, so would really welcome some help in developing the resident synthesizers' code. I think its especially important that Sf2Synth1 gets optimised.

December 2015
James Ingram

[1] A "Web MIDI Synth" is a software synth that uses the Web Audio API to implement the Output Device interface defined in the Web MIDI API. Web MIDI Synths can be used online independently of browser implementations of the Web MIDI API. Standard Web MIDI Synths can be used interchangeably with the hardware synths supplied by browser implementations of the Web MIDI API.

[2] The top-level files containing Web MIDI Synth interface definitions are:

• sf2Synth1/sf2synth1.js
• consoleSf2Synth.js
• cwMIDISynth/cwMIDISynth.js
• cwMonosynth.js