hello All I believe, more improvements require echo diagnostic script for octave tool. First of all, I found mistyping inside script, where hardcoded size of buffer used for matrix creation (1024) has to be replaced with variable from function parameter. I'm not sure, if octave displaying messages while executing script or only on success completion, however it would be good to have more stages displayed during processing action. It's also not clear why echo_diagnostic function freeze sometimes and after applying Ctrl+C and restarting it again, working fine. final question is, if it's possible to use regular .sw files for aec_rec.sw and aec_play.sw parameters instead of special hardcoded filenames. If yes, what is necessary to do in order to be able to support such files? I'm sending my version of echo_diagnostic.m with more printfs added (some of them may not exactly match activity, so please correct me). thanks -------------- next part -------------- A non-text attachment was scrubbed... Name: echo_diagnostic.m Type: application/octet-stream Size: 2416 bytes Desc: 1917777603-echo_diagnostic.m Url : http://lists.xiph.org/pipermail/speex-dev/attachments/20070414/eb7c5852/echo_diagnostic.obj