BASS_CONFIG_OGG_PRESCAN config option
Pre-scan chained OGG files?
|prescan||If TRUE, chained OGG files are pre-scanned.
This option is enabled by default, and is equivalent to including the BASS_STREAM_PRESCAN flag in a BASS_StreamCreateFile call when opening an OGG file. When disabled, the scanning of chained OGG files will be delayed until the first BASS_ChannelGetLength or BASS_ChannelSetPosition call, for faster stream creation.
BASS_GetConfig, BASS_SetConfig, BASS_StreamCreateFile