i found another beta sound, looks like it was a testing track for half life 2, it was in the file name test/temp/soundscape_test with a few other beta stuff in Half-Life 2's Sound Files.
i found another beta sound, looks like it was a testing track for half life 2, it was in the file name test/temp/soundscape_test with a few other beta stuff in Half-Life 2's Sound Files.