From owner-freebsd-multimedia Fri May 17 00:20:58 1996 Return-Path: owner-multimedia Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id AAA22558 for multimedia-outgoing; Fri, 17 May 1996 00:20:58 -0700 (PDT) Received: from mail.rwth-aachen.de (mail.RWTH-Aachen.DE [137.226.144.9]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id AAA22551 for ; Fri, 17 May 1996 00:20:53 -0700 (PDT) Received: from gilberto.physik.rwth-aachen.de (gilberto.physik.rwth-aachen.de) by mail.rwth-aachen.de (PMDF V5.0-4 #13110) id <01I4T2F1TO8W0015HF@mail.rwth-aachen.de> for multimedia@freebsd.org; Fri, 17 May 1996 09:14:20 +0100 Received: (from kuku@localhost) by gilberto.physik.rwth-aachen.de (8.6.11/8.6.9) id JAA12644 for multimedia@freebsd.org; Fri, 17 May 1996 09:21:10 +0200 Date: Fri, 17 May 1996 09:21:10 +0200 From: "Christoph P. Kukulies" Subject: full duplex observations To: multimedia@freebsd.org Message-id: <199605170721.JAA12644@gilberto.physik.rwth-aachen.de> Content-transfer-encoding: 7BIT Sender: owner-multimedia@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Now after doing some testing with a colleague I found out that the nasty echo effect doesn't stem from the GUS wiring mic to local speakers. It's simple. You hear your own voice delayed by the packet travel time fed back to your opponents mic. When he switched off his speakers the echo was gone. So either you use a head set on both sides or you refrain from using full duplex. Using a telephone you have that environment anyway plus the near light speed signal travel time so that with national connection not even a switching to room speakers would disturb. --Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de