I am looking to use this DX7 synth with Tidalcycles (more just as an exercise to better understand how to use custom synths).
However, I don't have a strong understanding of Supercollider, so I was wondering whether anyone has resources for using existing Synths in tidalcycles?
The TidalCycles User docs has a section on Adding Synthesizers to SuperDirt. It is a good starting place, but may not give you all you need to load an advanced synth like the DX7 you reference.
Docs > Configuration > SuperDirt Configuration >
https://tidalcycles.org/docs/configuration/adding_synthesizers
The SuperDirt install comes with a folder called "hacks". It includes SuperCollider code files that show you how to do things relevant to Tidal and SuperDirt. The file core-synth-hacks.scd is relevant and gives examples of the SynthDef syntax and how this reflects back to Tidal.
Look in your SuperCollider directory:
/SuperCollider/downloaded-quarks/SuperDirt