Five 5.1 VOB demos — Train Long is the most downloaded SD file in the section
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The Dolby Train Long demo is the standout on this page and, with over 56,000 downloads, the most downloaded SD demo in the entire Dolby section so far. At 47 seconds and 34.5MB it’s one of the longer files in the SD library, and the combination of low-frequency content and directional surround effects makes it genuinely useful for testing a 5.1 setup rather than just confirming decoding is active.
Train Short covers the same material in 34 seconds at 20MB — about half the download count of the Dolby Train Long demo at around 19,600. Worth having both if you want to do a quick check without committing to the full file, though the long version is the one people consistently come back to.
Waterfall comes in second on this page at around 24,000 downloads. Shorter at 23 seconds but the continuous nature of the audio — no hard cuts or sudden effects — makes it a decent test for how cleanly a system handles sustained ambient surround content.
Virtual Speaker is 24 seconds and sits just above Waterfall in downloads at 20,000. The name refers to Dolby Virtual Speaker technology, which simulates a surround soundfield from fewer physical speakers. On a standard 5.1 setup it plays as a normal 5.1 file — the virtual speaker processing happens in the encoder, not the playback device.
Wizzard is the smallest of the five at 4.36MB and 7 seconds. Same category as Fire, Optimizer and Enlighten from earlier pages — a quick decoding check, not a demo.
All five are Dolby Digital 5.1 in MPEG-PS (VOB) at 720×480 NTSC. No PAL files this time, no 2.0 variants — straightforward across the board.