endChild(span);
	};
	if(!fileData){
		showErr("请选择文件");
		return;
	};
	
	var getVal=function(cls,def,name,min,max,range){
		var val=+document.querySelector(cls).value||def;
		if(range&&range.indexOf(+val)==-1 || !range&&(val<min||val>max)){
			throw new Error("乱填"+name+"："+val+(range?"，"+name+"取值范围："+JSON.stringify(range):""));
		}
		return val;
	};
	try{
		var sampleRate=getVal(".in_sampleRate",0,"采样率",6000,9999999999);
		var bitRate=getVal(".in_bitRate",0,