Ping 75. A fm wave at 20 Hz, originating from Urban Grid. Recorded in a cathedral environment, era: 1970s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #0371 — Ping 75
ID#371
Rarity
LO:75%
Frequency
20 Hz
EX:4%
Wave Type
FM
EX:4%
Resonance
Dense
X-HI:6%
Era
1970s
X-HI:6%
Origin
Urban Grid