How to set the Timing options of an Audio shape? about shapecrawler HOT 2 OPEN

                        IEnumerable<DocumentFormat.OpenXml.Presentation.Timing> animationTimings = slidePart.Slide.Descendants<DocumentFormat.OpenXml.Presentation.Timing>();
                        foreach (DocumentFormat.OpenXml.Presentation.Timing animationTiming in animationTimings)
                        {
                            animationTiming.Remove();
                            //^ Remove any pre-existing slide animations
                        }

                        var slide = slidePart.Slide;
                        string timing = @"<p:timing xmlns:p=""http://schemas.openxmlformats.org/presentationml/2006/main""><p:tnLst><p:par><p:cTn id=""1"" dur=""indefinite"" restart=""never"" nodeType=""tmRoot""><p:childTnLst><p:seq concurrent=""1"" nextAc=""seek""><p:cTn id=""2"" dur=""indefinite"" nodeType=""mainSeq""><p:childTnLst><p:par><p:cTn id=""3"" fill=""hold""><p:stCondLst><p:cond delay=""indefinite""/><p:cond evt=""onBegin"" delay=""0""><p:tn val=""2""/></p:cond></p:stCondLst><p:childTnLst><p:par><p:cTn id=""4"" fill=""hold""><p:stCondLst><p:cond delay=""0""/></p:stCondLst><p:childTnLst><p:par><p:cTn id=""5"" presetID=""1"" presetClass=""mediacall"" presetSubtype=""0"" fill=""hold"" nodeType=""withEffect""><p:stCondLst><p:cond delay=""2000""/></p:stCondLst><p:childTnLst><p:cmd type=""call"" cmd=""playFrom(0.0)""><p:cBhvr><p:cTn id=""6"" dur=""indefinite"" fill=""hold""/><p:tgtEl><p:spTgt spid=""4""/></p:tgtEl></p:cBhvr></p:cmd></p:childTnLst></p:cTn></p:par></p:childTnLst></p:cTn></p:par></p:childTnLst></p:cTn></p:par></p:childTnLst></p:cTn><p:prevCondLst><p:cond evt=""onPrev"" delay=""0""><p:tgtEl><p:sldTgt/></p:tgtEl></p:cond></p:prevCondLst><p:nextCondLst><p:cond evt=""onNext"" delay=""0""><p:tgtEl><p:sldTgt/></p:tgtEl></p:cond></p:nextCondLst></p:seq><p:audio><p:cMediaNode vol=""80000""><p:cTn id=""7"" display=""0""><p:stCondLst><p:cond delay=""indefinite""/></p:stCondLst><p:endCondLst><p:cond evt=""onStopAudio"" delay=""0""><p:tgtEl><p:sldTgt/></p:tgtEl></p:cond></p:endCondLst></p:cTn><p:tgtEl><p:spTgt spid=""4""/></p:tgtEl></p:cMediaNode></p:audio></p:childTnLst></p:cTn></p:par></p:tnLst></p:timing>";
                        //^ For id=""6"", the dur has been set to ""indefinite"", rather than the duration of the audio.
                        XElement xElt = XElement.Parse(timing, LoadOptions.PreserveWhitespace);

                        var newChild = new DocumentFormat.OpenXml.Presentation.Timing(timing);
                        slide.AddChild(newChild);