The mixed echo voice which comes from line
The removed echos voice by OAKVC-32 DSP module
The real voice compares
Echo mixed voice
https://switchpi.com/wp-content/uploads/2019/04/before_ecdsp.wav
Removed echos by OAKVE-32
https://switchpi.com/wp-content/uploads/2019/04/after_ecdsp-1.wav