----

        struct ast_dsp *talkdetector = NULL;          /* talk detector dsp */
        int talkbreakpoint = 1000;
        int talkthreshold = 256;
        int talksilencecount = 0;
        int talksilence = 0;
        int talkgotsilence = 0;

----

                talkval = pbx_builtin_getvar_helper(chan,"MEETME_TALK_BREAKPOINT");
                if (talkval)
                        talkbreakpoint = atoi(talkval);

                talkval = pbx_builtin_getvar_helper(chan,"MEETME_TALK_THRESHOLD");
                if (talkval)
                        talkthreshold = atoi(talkval);

----

        talkdetector = ast_dsp_new();
        if (!talkdetector) {
                ast_log(LOG_WARNING, "Unable to create silence detector :(\n");
                return -1;
        }
        ast_dsp_set_threshold(talkdetector, talkthreshold);


----

                                if (f->frametype == AST_FRAME_VOICE) {

                                                talksilencecount = 0;
                                                ast_dsp_silence(talkdetector, f, &talksilencecount);
                                                if (talksilencecount) {
                                                        talksilence = talksilencecount;
                                                } else {
                                                        talksilence = 0;
                                                }

                                                ast_dsp_silence(noisedetector, f, &noisesilencecount);
                                                if (noisesilencecount) {
                                                        noisesilence = noisesilencecount;
                                                        noisegotsilence = 1;
                                                } else {
                                                        noisesilence = 0;
                                                } 

                                                if (talksilence > talkbreakpoint) {

                                                        if (!talkgotsilence) {
                                                                manager_event(EVENT_FLAG_CALL, "MeetmeSilent",
                                                                                "Channel: %s\r\n"
                                                                                "Uniqueid: %s\r\n"
                                                                                "MeetmeConf: %s\r\n"
                                                                                "MeetmeUser: %i\r\n",
                                                                                chan->name, chan->uniqueid, conf->confno, user->user_no);

                                                                talkgotsilence = 1;
                                                        }

                                                } else {

                                                        if (talkgotsilence) {
                                                                manager_event(EVENT_FLAG_CALL, "MeetmeTalking",
                                                                                "Channel: %s\r\n"
                                                                                "Uniqueid: %s\r\n"
                                                                                "MeetmeConf: %s\r\n"
                                                                                "MeetmeUser: %i\r\n",
                                                                                chan->name, chan->uniqueid, conf->confno, user->user_no);
                                                                talkgotsilence = 0;
                                                        }
                                                }