Test site
The test site is a separate front-end of the site for testing new instruments and features before pushing them to the main branch. You can access it by adding test.onlinesequencer
to the URL of a page. On the test site, profile pictures and playlist thumbnails will not load, the interfaces for sequence pages are older, and the forum/wiki lacks formatting or are not found respectively.
Synthesizer
Main Article: Synthesizer
Currently being tested is an adjustable synthesizer instrument (ID 55). Similar to the 8-bit instruments, it makes use of the Web Audio API instead of samples. It would allow for users to create custom sounds that will expand the user experience.