voice-engine\ec_hw incompatible with 4 mic linear array

hi

i have a problemi with 4 mic lineat array and voice-engine\ec

i have installed the 4 mic lineat

i have installed the voice-engine\ec

i need use as alsa default device

the asound.conf in voice-engine\ec seems made for ec and not for ec_hw, so i modified it a bit



i use this asound.conf

if i run ec_hw:

and next, try to run audio i get this error:

if i try to run audio without run ec_hw, i ear sound correctly