The raw recordings of the SYNCHRONOUS condition consisted of a stereo file per speaker pair (one channel per speaker). Each stereo file contained the whole read material (short fables and sentences), with one speaker on each channel. In order to preserve the time alignment between the two speakers' recordings, left and right channels have been edited in time aligned fashion before splitting into individual files. Again, pauses are often the result of editing operations, and are not as produced.
http://chains.ucd.ie/corpus.php
