You may specify whether you want to embed a seek table or not: in the Conversion Settings dialog, when the format is set to Vorbis, click on the "Edit..." button and specify a value for the "Seek table granularity (sample frames)" other than "No Seek Table". Refer to this article for a discussion on seek table granularity.
The seek table is stored in each file's header. In order to save up space, you should include a seek table only for sounds that need it.
If, for a given sound, you answer yes to one of these questions, then this sound may be seeked to an arbitrary position, and therefore requires a seek table:
- Explicit seeking is applied on it (using the SDK function AK::SoundEngine::SeekOnEvent(), or a Seek action);
- It is used within an audio clip in a music segment, and the clip's start position was trimmed (using the blue handle in the Segment Editor), or at least one music transition requires that the segment starts at a position which necessitates seeking (see example in the figure below);
- Under volume threshold, the sound is sent to virtual voices "From Elapsed Time" (sounds' advanced settings);
- (Wii only) Under volume threshold, the sound is sent "Continue to play" and you exceed the maximum DSP usage or hardware voice count.
If the sound has no seek table, and it was required at run-time, playback will fail at the time of seeking and the following error message will appear in the Wwise profiler: "Seek table required to seek in Vorbis sources".
If the sound has no seek table and has "Send to Virtual Voice - From Elapsed Time" behavior when under volume threshold, playback fails right from the start and the following error message appears in the Wwise profiler: "Seek table needed for Vorbis audio format with this virtual voice behavior.".
Figure - Seeking files in interactive music segments.
If this segment is used in a Playlist or a Switch Container with a transition rule with "Play Pre-Entry" unchecked, the sound engine will have to jump to the portion of the file that corresponds to the entry cue (the cue with a green arrow). Thus, this file requires an embedded seek table if it is encoded in the Vorbis format.
