AK_MusicSyncBeat                = 0x0100,   // Enable notifications on Music Beat.
AK_MusicSyncBar                 = 0x0200,   // Music Bar の通知を有効にします。
AK_MusicSyncEntry               = 0x0400,   // Music Entry Point の通知を有効にします。
AK_MusicSyncExit                = 0x0800,   // Music Exit Point の通知を有効にします。
AK_MusicSyncGrid                = 0x1000,   // Music Grid の通知を有効にします。
AK_MusicSyncUserCue             = 0x2000,   // Music User Cue の通知を有効にします。
AK_MusicSyncPoint               = 0x4000,   // Music 同期ポイントの通知を有効にします。
AK_MusicSyncAll                 = 0xff00,   // AK_MusicSync登録に関するすべての通知を受信する場合は、このフラグを使用します。

AkPlayingID AK::SoundEngine::PostEvent(
    AkUniqueID in_eventID,                  // Unique ID of the event
    AkGameObjectID in_gameObjectID,         // Associated game object ID
    AkUInt32 in_uFlags = 0,                 // Bitmask: see AkCallbackType
    AkCallbackFunc in_pfnCallback = NULL,   // Callback function
    void * in_pCookie = NULL                // Callback cookie that will be sent to the callback function 
                                            // along with additional information
);

static void MusicCallback(
    AkCallbackType in_eType,            // Type of callback reason, in this case it could be AK_MusicSyncBeat
    AkCallbackInfo* in_pCallbackInfo    // Pointer to callback information structure, in this case
                                        // AkMusicSyncCallbackInfo*.
    )

/// Callback information structure corresponding to Ak_MusicSync
struct AkMusicSyncCallbackInfo : public AkCallbackInfo
{
    AkPlayingID playingID;          ///< Playing ID of Event, returned by PostEvent()
    AkCallbackType musicSyncType;   ///< Would be either AK_MusicSyncEntry, AK_MusicSyncBeat, AK_MusicSyncBar, AK_MusicSyncExit, AK_MusicSyncGrid, AK_MusicSyncPoint or AK_MusicSyncUserCue.
    AkReal32 fBeatDuration;         ///< Beat Duration in seconds.
    AkReal32 fBarDuration;          ///< Bar Duration in seconds.
    AkReal32 fGridDuration;         ///< Grid duration in seconds.
    AkReal32 fGridOffset;           ///< Grid offset in seconds.
};

AK_MusicPlaylistSelect          = 0x0040    // Callback triggered when music playlist container must select the next item to play.

/// Callback information structure corresponding to Ak_MusicPlaylistSelect
struct AkMusicPlaylistCallbackInfo : public AkEventCallbackInfo
{
    AkPlayingID playlistID;         ///< ID of active node in music playlist container
    AkUInt32 uNumPlaylistItems;     ///< Number of items in playlist node (may be segments or other playlists)
    AkUInt32 uPlaylistSelection;    ///< Selection: set by sound engine, modified by callback function (if not in range 0 <= uPlaylistSelection < uNumPlaylistItems then ignored)
    AkUInt32 uPlaylistItemDone;     ///< Playlist node done: set by sound engine, modified by callback function (if set to anything but 0 then the current playlist item is done, and uPlaylistSelection is ignored)
};