# Copy channels to virtual channels to filter them while keeping the originals
Copy: L2=L R2=R
# Select channels for filtering
Channel: L2 R2
# Limit frequency range for delay
Filter: ON HP Fc 200 Hz
Filter: ON LP Fc 2000 Hz
# Apply delay
Delay: 500 ms
# Add the delayed signal back to the original channels
Copy: L=0.5*L+0.5*L2 R=0.5*R+0.5*R2