Source:
Source 1 by Titan_Wang: Cell phone > AAC (129kbps) Location: The left side of the second floor Source 2 by wuming_shi: Cell phone > WAV (48/16) Location: To the left rear of the mixing console, directly opposite Efrim
Lineage:
all 2 sources > REAPER (Source 1 panned 13% left, Source 2 panned 35% left, EQ, adjust volume, fades out, splits) > FLAC (44/16, level 8) > foobar2000 (tagging)