| Source | Explanation |
| include/uart401.h | Definitions for the MPU-401 UART driver |
| include/remux.h | Definitions for the audio remux engine |
| include/eq1.h | This header file contains some coefficients for the 4 band equalizer |
| include/grc3.h | GRC library version 3.1 internal definitions |
| include/udi.h | USB abstraction structures and functions used by OSS |
| include/midi_core.h | Structure and function definitions for OSS MIDI core |
| include/oss_exports.h | Source file oss-current/kernel/framework/include/ossddk/oss_exports.h |
| include/ossddk.h | Source file oss-current/kernel/framework/include/ossddk/ossddk.h |
| include/audio_core.h | Internal definitions for the OS audio core |
| include/mixer_core.h | Mixer specific internal structure and function definitions. |
| include/midiparser.h | Definitions for the MIDI message parser |
| include/internal.h | Definitions for internal use by OSS |
| include/ac97.h | Definitions for the AC97 codec support library |
| include/oss_config.h | The top level header file for compiling OSS itself. |
| include/oss_memblk.h | OSS memory block allocation and management routines. |
| include/oss_version.h | OSS version ID |
| include/oss_calls.h | Prototypes for various internal routines of OSS. |
| include/spdif.h | Definitions for S/PDIF (IEC958) control bit and mixer extension manager |
| include/oss_pci.h | Definitions of various PCI specific constants and functions |
