found the fix, auto gain control on the cm108 is getting turned on. Question is why is it getting turned on? If I open alsamixer and turn it off, no echo. On restarting asterisk, it comes back on. I tried storing the current settings with alsactl store and rebooting. Same thing. At least I know what's causing it. I was going crazy thinking it was some wiring crosstalk or something. -- Don Russell, CBRE CBNT W9DRR - ARRL OES, Technical Specialist http://www.socialengineer.us On Sat, Feb 23, 2013 at 10:11 PM, Don Russell <w9drr.ham@gmail.com> wrote:

I am building a new node from scratch. atom pc, uri-x, 2 SM50's.. nothing fancy.

I am getting a 1/2 second echo, like you have another radio on in the room.

I did the normal tuneup. got these parameters. rxmixerset=125 txmixaset=400 txmixbset=0 rxvoiceadj=2.725307 rxctcssadj=4.019996 txctcssadj=300 rxsquelchadj=850

I tried with/without the rxboost. no change. I have battled this in the past and I just don't remember what the fix was. It's been a 2 years since I have had a node up. trying to get back in the swing of things again.

I did bring up alsamixer, the card looks good, mic is not in playback mix.

-- Don Russell, CBRE CBNT W9DRR - ARRL OES, Technical Specialist http://www.socialengineer.us