I checked all the demos, projects, templates, whatever, inside the Cube package for F4 devices but couldn't find anything similar to the F4 demo builder package. Audio playback layer in particular. Aside from decoders involved, the audio playback layer is not the same across the aforementioned packages. Some are built with HAL, some with SPL, some with RTOS, some without RTOS, etc..
What I need is an audio playback demo/template project that I can build upon, based on HAL and FreeRTOS.