This tool is back to mostly working! please check it out and let me know if any issues arise
to use the preview pattern method which will render patterns as mp3's you must pip install simpleaudio. will add this to requirements.txt soon.
spEdit is a tool for modifying and creating binary pattern files for the Roland SP-404SX. For more information check out my series of blog posts about the sp404SX pattern format and the spEdit tool : spEdit blog posts!