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To play back DTS (Digital Theatre Surround) within AVI/MKV/OGM files you have two options.
1. Use an XForm filter that relays the AC3/DTS data from the AVI/MKV/OGM container into an AC3/DTS Decoder and the second is the Decoder itself.
2. Use The Open-S

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dts audio codec xform filter ac3 decoder