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Building a MIDI to LSDJ Web App in Flask & React
Continuing on from the work I’d done turning a MIDI file into LSDJ commands I set myself a goal to fix some of the issues I had with printing the entities to the CLI.
My main bugbear with the CLI was the fact that it was hard to keep track of which phrase/chain you were on and if there were many phrases you could easily make mistakes due to how clunky things looked.
Another restriction I found with the CLI approach was the fact that it required someone to download Python and the package to run it.
In order to allow the tool to be used by more people and make it easier to visualise the output of the tool I decided to build a web app to handle a MIDI file upload and return a series of screens representing the phrases, chains and song that make up the LDSJ version of that song.
Serialising LSDJ
In order to display the LSDJ entities in a web app I first needed to refactor the existing CLI so that it could provide a serialised version of the LSDJ structure I used to create the CLI output.
I started by breaking out the original script into multiple modules that would allow me to have a common MIDI to LSDJ translation ‘core’ and then pass that data structure into different ‘presentation’ layers.
