Adjust volume on autoplay with a playlist xml ?

use playingsong.setVolume():

playingsong.setVolume(50);  // 50%

for loaded sounds, you should assign a volume after loading is complete.  you'll need to start a loop (eg, onEnterFrame) and check the getBytesLoaded() with getBytesTotal() to find when loading is complete.

also, it looks like you're already adjust the volume using a slider (though that code may not be correct).

when you adjust your volumne slider from one extreme to the other, what trace output do you see (copy/paste) using:

stop();
var songs:Array = new Array();
var curtrack:Number = 0;
var playingsong:Sound = new Sound();

loadSongs();
loadplaylistbox();
loadSong(curtrack);
if (_root.autostart == "false") {
  toggleplaypause();
}

function loadSongs() {
for (songIndex=0; songIndex<_root.playlistXml.childNodes[0].childNodes[0].childNodes.le ngth; songIndex++) {
  var songdata:Object = new Object();
  for (songNode=0; songNode<_root.playlistXml.childNodes[0].childNodes[0].childNodes[son gIndex].childNodes.length; songNode++) {
   switch(_root.playlistXml.childNodes[0].childNodes[0].childNodes[songI ndex].childNodes[songNode].nodeName){
   case "creator":
    songdata.artist = _root.playlistXml.childNodes[0].childNodes[0].childNodes[songIndex].c hildNodes[songNode].childNodes[0].nodeValue;
    break;
   case "title":
    songdata.title = _root.playlistXml.childNodes[0].childNodes[0].childNodes[songIndex].c hildNodes[songNode].childNodes[0].nodeValue;
    break;
   case "location":
    songdata.location = _root.playlistXml.childNodes[0].childNodes[0].childNodes[songIndex].c hildNodes[songNode].childNodes[0].nodeValue;
    break;
   }
  }
  songs[songIndex] = songdata;
}
}
function loadSong(track) {
playingsong = new Sound();
playingsong.loadSound(songs[track].location, true);
playingsong.start(0);
updatevolume();
playingsong.onSoundComplete = function() {
  loadSong((curtrack+1)%(songs.length));
};
playpause.gotoAndStop(1);
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
songdisplay.text = songs[track].artist+" - "+songs[track].title;
eval("playlistbox.playlistitemcontainer.playlistitem"+curtrack+".play listitemhighlight")._alpha = 100;
eval("playlistbox.playlistitemcontainer.playlistitem"+track+".playlis titemhighlight")._alpha = 1;
curtrack = track;
}
function loadplaylistbox() {
for (songIndex=0; songIndex<_root.playlistXml.childNodes[0].childNodes[0].childNodes.le ngth; songIndex++) {
  playlistbox.playlistitemcontainer.attachMovie("playlistitem", "playlistitem"+songIndex, playlistbox.playlistitemcontainer.getNextHighestDepth(), {_x:0, _y:15*songIndex});
  eval("playlistbox.playlistitemcontainer.playlistitem"+songIndex+".pla ylistitemtext").text = songs[songIndex].artist+" - "+songs[songIndex].title;
  eval("playlistbox.playlistitemcontainer.playlistitem"+songIndex).song index = songIndex;
}
}
playpause.playpausebutton.onPress = function() {
toggleplaypause();
};
function toggleplaypause() {
if (playpause._currentframe == 1) {
  playpause.gotoAndStop(2);
  playpause.curpos = playingsong.position;
  playingsong.stop();
} else {
  playpause.gotoAndStop(1);
  playingsong.start(playpause.curpos/1000, 0);
}
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
}
onEnterFrame = function () {
if (songdisplay.movingright) {
  //songdisplay.hscroll -= 10;
  if (songdisplay.hscroll<=0) {
   //songdisplay.movingright = false;
  }
} else {
  //songdisplay.hscroll += 10;
  if (songdisplay.hscroll>=songdisplay.maxhscroll) {
   //songdisplay.movingright = true;
  }
}
if (!draggingslider) {
  progressslider._x = (playingsong.position/playingsong.duration)*182-89;
  //if (progressslider._x == 0) {
   //progressslider._x = 61;
  //}
}
if (draggingplaylistscroller) {
  updateplaylistscroll();
}
if (draggingvolmeslider) {
  updatevolume();
}
tempsongtime = "";
if (Math.floor(playingsong.position/60000) == 0) {
  tempsongtime += "0";
} else {
  tempsongtime += Math.floor(playingsong.position/60000);
}
tempsongtime += ":";
if (Math.floor((playingsong.position/1000)%60)<10) {
  tempsongtime += "0";
}
tempsongtime += Math.floor((playingsong.position/1000)%60);
tempsongtime += "/";
if (Math.floor(playingsong.duration/60000) == 0) {
  tempsongtime += "0";
} else {
  tempsongtime += Math.floor(playingsong.duration/60000);
}
tempsongtime += ":";
if (Math.floor((playingsong.duration/1000)%60)<10) {
  tempsongtime += "0";
}
tempsongtime += Math.floor((playingsong.duration/1000)%60);
songtime.text = tempsongtime;

};
progressslider.onPress = function() {
draggingslider = true;
progressslider.startDrag(true, -89, progressslider._y, 93, progressslider._y);
};
progressslider.onRelease = progressslider.onReleaseOutside=function () {
progressslider.stopDrag();
playingsong.start(((progressslider._x+89)/182)*playingsong.duration/1 000, 0);
playpause.gotoAndStop(1);
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
draggingslider = false;
};
progressbar.onPress = function() {
playingsong.start(((this._xmouse+2)/182)*playingsong.duration/1000, 0);
playpause.gotoAndStop(1);
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
};
volumebar.onPress = function() {
draggingvolmeslider = true;
volumebar.volumeslider.startDrag(true, 0, volumebar.volumeslider._y, 47, volumebar.volumeslider._y);
};
volumebar.onRelease = volumebar.onReleaseOutside=function () {
draggingvolmeslider = false;
volumebar.volumeslider.stopDrag();
updatevolume();
};
function updatevolume() {

trace((volumebar.volumeslider._x / 47) * 100)

playingsong.setVolume((volumebar.volumeslider._x/47)*100);
}
previoussong.onPress = function() {
loadprevioussong();
};
function loadprevioussong() {
var loadtrack = (curtrack-1)%(songs.length);
if (loadtrack<0) {
  loadtrack = songs.length-1;
}
loadSong(loadtrack);
}
nextsong.onPress = function() {
loadnextsong();
};
function loadnextsong() {
var loadtrack = (curtrack+1)%(songs.length);
loadSong(loadtrack);
}
playlistscroller.onPress = function() {
draggingplaylistscroller = true;
playlistscroller.startDrag(true, 452, -80, 452, -59);
};
playlistscroller.onRelease = playlistscroller.onReleaseOutside=function () {
draggingplaylistscroller = false;
playlistscroller.stopDrag();
};
playlistscrollup.onPress = function() {
playlistscroller._y = Math.max(-80, playlistscroller._y-0.5);
updateplaylistscroll();
};
playlistscrolldown.onPress = function() {
playlistscroller._y = Math.min(-59, playlistscroller._y+0.5);
updateplaylistscroll();
};
var mouseListener:Object = new Object();
mouseListener.onMouseWheel = function(delta:Number) {
playlistscroller._y = Math.min(-59, Math.max(-80, playlistscroller._y-delta));
updateplaylistscroll();
};
Mouse.addListener(mouseListener);
playlistscrollbar.onPress = function() {
playlistscroller._y = Math.min(-59, Math.max(-80, _ymouse));
updateplaylistscroll();
};
function updateplaylistscroll() {
playlistbox.playlistitemcontainer._y = -((playlistscroller._y +80)/21)*(playlistbox.playlistitemcontainer._height-69);
}

when you move that slider (after your sound starts to play), does it change the sound's volume?

ok, so what is that you want to change?

use the slider and the code below to get a volume of about 50% and note the volumeslider's _x value:

you can then assign that value at the start of your app and call updatevolume() after your first sound loads.

stop();
var songs:Array = new Array();
var curtrack:Number = 0;
var playingsong:Sound = new Sound();

loadSongs();
loadplaylistbox();
loadSong(curtrack);
if (_root.autostart == "false") {
  toggleplaypause();
}

function loadSongs() {
for (songIndex=0; songIndex<_root.playlistXml.childNodes[0].childNodes[0].childNodes.le ngth; songIndex++) {
  var songdata:Object = new Object();
  for (songNode=0; songNode<_root.playlistXml.childNodes[0].childNodes[0].childNodes[son gIndex].childNodes.length; songNode++) {
   switch(_root.playlistXml.childNodes[0].childNodes[0].childNodes[songI ndex].childNodes[songNode].nodeName){
   case "creator":
    songdata.artist = _root.playlistXml.childNodes[0].childNodes[0].childNodes[songIndex].c hildNodes[songNode].childNodes[0].nodeValue;
    break;
   case "title":
    songdata.title = _root.playlistXml.childNodes[0].childNodes[0].childNodes[songIndex].c hildNodes[songNode].childNodes[0].nodeValue;
    break;
   case "location":
    songdata.location = _root.playlistXml.childNodes[0].childNodes[0].childNodes[songIndex].c hildNodes[songNode].childNodes[0].nodeValue;
    break;
   }
  }
  songs[songIndex] = songdata;
}
}
function loadSong(track) {
playingsong = new Sound();
playingsong.loadSound(songs[track].location, true);
playingsong.start(0);
updatevolume();
playingsong.onSoundComplete = function() {
  loadSong((curtrack+1)%(songs.length));
};
playpause.gotoAndStop(1);
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
songdisplay.text = songs[track].artist+" - "+songs[track].title;
eval("playlistbox.playlistitemcontainer.playlistitem"+curtrack+".play listitemhighlight")._alpha = 100;
eval("playlistbox.playlistitemcontainer.playlistitem"+track+".playlis titemhighlight")._alpha = 1;
curtrack = track;
}
function loadplaylistbox() {
for (songIndex=0; songIndex<_root.playlistXml.childNodes[0].childNodes[0].childNodes.le ngth; songIndex++) {
  playlistbox.playlistitemcontainer.attachMovie("playlistitem", "playlistitem"+songIndex, playlistbox.playlistitemcontainer.getNextHighestDepth(), {_x:0, _y:15*songIndex});
  eval("playlistbox.playlistitemcontainer.playlistitem"+songIndex+".pla ylistitemtext").text = songs[songIndex].artist+" - "+songs[songIndex].title;
  eval("playlistbox.playlistitemcontainer.playlistitem"+songIndex).song index = songIndex;
}
}
playpause.playpausebutton.onPress = function() {
toggleplaypause();
};
function toggleplaypause() {
if (playpause._currentframe == 1) {
  playpause.gotoAndStop(2);
  playpause.curpos = playingsong.position;
  playingsong.stop();
} else {
  playpause.gotoAndStop(1);
  playingsong.start(playpause.curpos/1000, 0);
}
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
}
onEnterFrame = function () {
if (songdisplay.movingright) {
  //songdisplay.hscroll -= 10;
  if (songdisplay.hscroll<=0) {
   //songdisplay.movingright = false;
  }
} else {
  //songdisplay.hscroll += 10;
  if (songdisplay.hscroll>=songdisplay.maxhscroll) {
   //songdisplay.movingright = true;
  }
}
if (!draggingslider) {
  progressslider._x = (playingsong.position/playingsong.duration)*182-89;
  //if (progressslider._x == 0) {
   //progressslider._x = 61;
  //}
}
if (draggingplaylistscroller) {
  updateplaylistscroll();
}
if (draggingvolmeslider) {
  updatevolume();
}
tempsongtime = "";
if (Math.floor(playingsong.position/60000) == 0) {
  tempsongtime += "0";
} else {
  tempsongtime += Math.floor(playingsong.position/60000);
}
tempsongtime += ":";
if (Math.floor((playingsong.position/1000)%60)<10) {
  tempsongtime += "0";
}
tempsongtime += Math.floor((playingsong.position/1000)%60);
tempsongtime += "/";
if (Math.floor(playingsong.duration/60000) == 0) {
  tempsongtime += "0";
} else {
  tempsongtime += Math.floor(playingsong.duration/60000);
}
tempsongtime += ":";
if (Math.floor((playingsong.duration/1000)%60)<10) {
  tempsongtime += "0";
}
tempsongtime += Math.floor((playingsong.duration/1000)%60);
songtime.text = tempsongtime;

};
progressslider.onPress = function() {
draggingslider = true;
progressslider.startDrag(true, -89, progressslider._y, 93, progressslider._y);
};
progressslider.onRelease = progressslider.onReleaseOutside=function () {
progressslider.stopDrag();
playingsong.start(((progressslider._x+89)/182)*playingsong.duration/1 000, 0);
playpause.gotoAndStop(1);
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
draggingslider = false;
};
progressbar.onPress = function() {
playingsong.start(((this._xmouse+2)/182)*playingsong.duration/1000, 0);
playpause.gotoAndStop(1);
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
};
volumebar.onPress = function() {
draggingvolmeslider = true;
volumebar.volumeslider.startDrag(true, 0, volumebar.volumeslider._y, 47, volumebar.volumeslider._y);
};
volumebar.onRelease = volumebar.onReleaseOutside=function () {
draggingvolmeslider = false;
volumebar.volumeslider.stopDrag();
updatevolume();
};
function updatevolume() {

trace((volumebar.volumeslider._x / 47) * 100+" : volumeSlider _x= "+volumebar.volumeslider._x)

playingsong.setVolume((volumebar.volumeslider._x/47)*100);
}
previoussong.onPress = function() {
loadprevioussong();
};
function loadprevioussong() {
var loadtrack = (curtrack-1)%(songs.length);
if (loadtrack<0) {
  loadtrack = songs.length-1;
}
loadSong(loadtrack);
}
nextsong.onPress = function() {
loadnextsong();
};
function loadnextsong() {
var loadtrack = (curtrack+1)%(songs.length);
loadSong(loadtrack);
}
playlistscroller.onPress = function() {
draggingplaylistscroller = true;
playlistscroller.startDrag(true, 452, -80, 452, -59);
};
playlistscroller.onRelease = playlistscroller.onReleaseOutside=function () {
draggingplaylistscroller = false;
playlistscroller.stopDrag();
};
playlistscrollup.onPress = function() {
playlistscroller._y = Math.max(-80, playlistscroller._y-0.5);
updateplaylistscroll();
};
playlistscrolldown.onPress = function() {
playlistscroller._y = Math.min(-59, playlistscroller._y+0.5);
updateplaylistscroll();
};
var mouseListener:Object = new Object();
mouseListener.onMouseWheel = function(delta:Number) {
playlistscroller._y = Math.min(-59, Math.max(-80, playlistscroller._y-delta));
updateplaylistscroll();
};
Mouse.addListener(mouseListener);
playlistscrollbar.onPress = function() {
playlistscroller._y = Math.min(-59, Math.max(-80, _ymouse));
updateplaylistscroll();
};
function updateplaylistscroll() {
playlistbox.playlistitemcontainer._y = -((playlistscroller._y +80)/21)*(playlistbox.playlistitemcontainer._height-69);
}

use:

stop();
var songs:Array = new Array();
var curtrack:Number = 0;
var playingsong:Sound = new Sound();

volumebar.volumeslider._x = 29;

updatevolume();

loadSongs();
loadplaylistbox();
loadSong(curtrack);
if (_root.autostart == "false") {
  toggleplaypause();
}

function loadSongs() {
for (songIndex=0; songIndex<_root.playlistXml.childNodes[0].childNodes[0].childNodes.le ngth; songIndex++) {
  var songdata:Object = new Object();
  for (songNode=0; songNode<_root.playlistXml.childNodes[0].childNodes[0].childNodes[son gIndex].childNodes.length; songNode++) {
   switch(_root.playlistXml.childNodes[0].childNodes[0].childNodes[songI ndex].childNodes[songNode].nodeName){
   case "creator":
    songdata.artist = _root.playlistXml.childNodes[0].childNodes[0].childNodes[songIndex].c hildNodes[songNode].childNodes[0].nodeValue;
    break;
   case "title":
    songdata.title = _root.playlistXml.childNodes[0].childNodes[0].childNodes[songIndex].c hildNodes[songNode].childNodes[0].nodeValue;
    break;
   case "location":
    songdata.location = _root.playlistXml.childNodes[0].childNodes[0].childNodes[songIndex].c hildNodes[songNode].childNodes[0].nodeValue;
    break;
   }
  }
  songs[songIndex] = songdata;
}
}
function loadSong(track) {
playingsong = new Sound();
playingsong.loadSound(songs[track].location, true);
playingsong.start(0);
updatevolume();
playingsong.onSoundComplete = function() {
  loadSong((curtrack+1)%(songs.length));
};
playpause.gotoAndStop(1);
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
songdisplay.text = songs[track].artist+" - "+songs[track].title;
eval("playlistbox.playlistitemcontainer.playlistitem"+curtrack+".play listitemhighlight")._alpha = 100;
eval("playlistbox.playlistitemcontainer.playlistitem"+track+".playlis titemhighlight")._alpha = 1;
curtrack = track;
}
function loadplaylistbox() {
for (songIndex=0; songIndex<_root.playlistXml.childNodes[0].childNodes[0].childNodes.le ngth; songIndex++) {
  playlistbox.playlistitemcontainer.attachMovie("playlistitem", "playlistitem"+songIndex, playlistbox.playlistitemcontainer.getNextHighestDepth(), {_x:0, _y:15*songIndex});
  eval("playlistbox.playlistitemcontainer.playlistitem"+songIndex+".pla ylistitemtext").text = songs[songIndex].artist+" - "+songs[songIndex].title;
  eval("playlistbox.playlistitemcontainer.playlistitem"+songIndex).song index = songIndex;
}
}
playpause.playpausebutton.onPress = function() {
toggleplaypause();
};
function toggleplaypause() {
if (playpause._currentframe == 1) {
  playpause.gotoAndStop(2);
  playpause.curpos = playingsong.position;
  playingsong.stop();
} else {
  playpause.gotoAndStop(1);
  playingsong.start(playpause.curpos/1000, 0);
}
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
}
onEnterFrame = function () {
if (songdisplay.movingright) {
  //songdisplay.hscroll -= 10;
  if (songdisplay.hscroll<=0) {
   //songdisplay.movingright = false;
  }
} else {
  //songdisplay.hscroll += 10;
  if (songdisplay.hscroll>=songdisplay.maxhscroll) {
   //songdisplay.movingright = true;
  }
}
if (!draggingslider) {
  progressslider._x = (playingsong.position/playingsong.duration)*182-89;
  //if (progressslider._x == 0) {
   //progressslider._x = 61;
  //}
}
if (draggingplaylistscroller) {
  updateplaylistscroll();
}
if (draggingvolmeslider) {
  updatevolume();
}
tempsongtime = "";
if (Math.floor(playingsong.position/60000) == 0) {
  tempsongtime += "0";
} else {
  tempsongtime += Math.floor(playingsong.position/60000);
}
tempsongtime += ":";
if (Math.floor((playingsong.position/1000)%60)<10) {
  tempsongtime += "0";
}
tempsongtime += Math.floor((playingsong.position/1000)%60);
tempsongtime += "/";
if (Math.floor(playingsong.duration/60000) == 0) {
  tempsongtime += "0";
} else {
  tempsongtime += Math.floor(playingsong.duration/60000);
}
tempsongtime += ":";
if (Math.floor((playingsong.duration/1000)%60)<10) {
  tempsongtime += "0";
}
tempsongtime += Math.floor((playingsong.duration/1000)%60);
songtime.text = tempsongtime;

};
progressslider.onPress = function() {
draggingslider = true;
progressslider.startDrag(true, -89, progressslider._y, 93, progressslider._y);
};
progressslider.onRelease = progressslider.onReleaseOutside=function () {
progressslider.stopDrag();
playingsong.start(((progressslider._x+89)/182)*playingsong.duration/1 000, 0);
playpause.gotoAndStop(1);
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
draggingslider = false;
};
progressbar.onPress = function() {
playingsong.start(((this._xmouse+2)/182)*playingsong.duration/1000, 0);
playpause.gotoAndStop(1);
playpause.playpausebutton.onPress = function() {
  toggleplaypause();
};
};
volumebar.onPress = function() {
draggingvolmeslider = true;
volumebar.volumeslider.startDrag(true, 0, volumebar.volumeslider._y, 47, volumebar.volumeslider._y);
};
volumebar.onRelease = volumebar.onReleaseOutside=function () {
draggingvolmeslider = false;
volumebar.volumeslider.stopDrag();
updatevolume();
};
function updatevolume() {

// trace((volumebar.volumeslider._x / 47) * 100+" : volumeSlider _x= "+volumebar.volumeslider._x)  <- no longer needed

playingsong.setVolume((volumebar.volumeslider._x/47)*100);
}
previoussong.onPress = function() {
loadprevioussong();
};
function loadprevioussong() {
var loadtrack = (curtrack-1)%(songs.length);
if (loadtrack<0) {
  loadtrack = songs.length-1;
}
loadSong(loadtrack);
}
nextsong.onPress = function() {
loadnextsong();
};
function loadnextsong() {
var loadtrack = (curtrack+1)%(songs.length);
loadSong(loadtrack);
}
playlistscroller.onPress = function() {
draggingplaylistscroller = true;
playlistscroller.startDrag(true, 452, -80, 452, -59);
};
playlistscroller.onRelease = playlistscroller.onReleaseOutside=function () {
draggingplaylistscroller = false;
playlistscroller.stopDrag();
};
playlistscrollup.onPress = function() {
playlistscroller._y = Math.max(-80, playlistscroller._y-0.5);
updateplaylistscroll();
};
playlistscrolldown.onPress = function() {
playlistscroller._y = Math.min(-59, playlistscroller._y+0.5);
updateplaylistscroll();
};
var mouseListener:Object = new Object();
mouseListener.onMouseWheel = function(delta:Number) {
playlistscroller._y = Math.min(-59, Math.max(-80, playlistscroller._y-delta));
updateplaylistscroll();
};
Mouse.addListener(mouseListener);
playlistscrollbar.onPress = function() {
playlistscroller._y = Math.min(-59, Math.max(-80, _ymouse));
updateplaylistscroll();
};
function updateplaylistscroll() {
playlistbox.playlistitemcontainer._y = -((playlistscroller._y +80)/21)*(playlistbox.playlistitemcontainer._height-69);
}

uncomment that trace() statement in updatevolume() to see if something is calling that function around the 4-5 sec mark when you hear the volume increase.

you're welcome.