Megadev audio

Choose the sound path from the game's needs, not the Lab's music or appearance. Sega CD adds CD-DA and an eight-channel PCM chip; the base console's FM/PSG still exist. These paths have different data formats, owners and loading constraints.

• Read Sound paths for actual Megadev APIs, sample encoding, mixed-mode discs and the FM/PSG boundary.
• Read Runtime ownership for voice priorities, Main/Sub requests and CD music/data handoffs.
• Read Validation for asset checks, executable tests, PAL/NTSC auditions and remaining hardware evidence.

Use ewrogers/megadev:latest and inspect its selected source before teaching an API. The audited revision and primary links are in the references. Do not port SGDK XGM/SND calls or imply that Megadev bundles an equivalent music driver.

Essential contracts: