Source:
4 Channel Audience Matrix: source 1: Nakamichi CM-300 (CP-1)> Tascam DR-680mkII @16/48 (channels 1 and 2), source 2: Tascam PE-120 (omni caps, spaced @ 14")> Tascam DR-680mkII @16/48 (channels 3 and 4)
Lineage:
Tascam DR-680mkII> USB> PC> Audacity v2.3.3> wav> CDWave > Traders Little Helper> flac (level 8 compression)