you can set the volume of the jukebox now, preferences tab -> set volume

Conflicts:
	code/modules/media/mediamanager.dm

code/modules/client/preferences.dm

@@ -126,6 +126,8 @@ datum/preferences
 	// Whether or not to use randomized character slots
 	var/randomslot = 0
 
+	// jukebox volume
+	var/volume = 100
 /datum/preferences/New(client/C)
 	b_type = pick(4;"O-", 36;"O+", 3;"A-", 28;"A+", 1;"B-", 20;"B+", 1;"AB-", 5;"AB+")
 	if(istype(C))

code/modules/client/preferences_savefile.dm

@@ -58,7 +58,7 @@
 	S["UI_style_color"]		>> UI_style_color
 	S["UI_style_alpha"]		>> UI_style_alpha
 	S["randomslot"]			>> randomslot
-
+	S["volume"]				>> volume
 	//Sanitize
 	ooccolor		= sanitize_hexcolor(ooccolor, initial(ooccolor))
 	lastchangelog	= sanitize_text(lastchangelog, initial(lastchangelog))
@@ -70,6 +70,7 @@
 	UI_style_color	= sanitize_hexcolor(UI_style_color, initial(UI_style_color))
 	UI_style_alpha	= sanitize_integer(UI_style_alpha, 0, 255, initial(UI_style_alpha))
 	randomslot		= sanitize_integer(randomslot, 0, 1, initial(randomslot))
+	volume			= sanitize_integer(volume, 0, 100, initial(volume))
 	return 1
 
 /datum/preferences/proc/save_preferences()
@@ -91,6 +92,17 @@
 	S["UI_style_color"]		<< UI_style_color
 	S["UI_style_alpha"]		<< UI_style_alpha
 	S["randomslot"]			<< randomslot
+	S["volume"]				<< volume
+	return 1
+
+//saving volume changes
+/datum/preferences/proc/save_volume()
+	if(!path)				return 0
+	var/savefile/S = new /savefile(path)
+	if(!S)					return 0
+	S.cd = "/"
+
+	S["volume"]				<< volume
 	return 1
 
 /datum/preferences/proc/load_save(dir)

code/modules/media/mediamanager.dm

@@ -85,7 +85,7 @@ function SetMusic(url, time, volume) {
 	proc/update_music()
 		var/targetURL = ""
 		var/targetStartTime = 0
-		var/targetVolume = 25
+		//var/targetVolume = volume
 
 		if (!owner)
 			//testing("owner is null")
@@ -104,8 +104,26 @@ function SetMusic(url, time, volume) {
 		//else
 		//	testing("M is not playing or null.")
 
-		if (url != targetURL || abs(targetStartTime - start_time) > 1 || targetVolume != volume)
+		if (url != targetURL || abs(targetStartTime - start_time) > 1)
 			url = targetURL
 			start_time = targetStartTime
-			volume = targetVolume
-			send_update()
+			//volume = targetVolume
+			send_update()
+
+	proc/update_volume(var/value)
+		volume = value
+		send_update()
+
+/client/verb/change_volume()
+	set name = "Set Volume"
+	set category = "Preferences"
+	set desc = "Set jukebox volume"
+	if(!media || !istype(media))
+		usr << "You have no media datum to change, if you're not in the lobby tell an admin."
+		return
+	var/value = input("Choose your Jukebox volume.", "Jukebox volume", media.volume)
+	value = round(max(0, min(100, value)))
+	media.update_volume(value)
+	if(prefs)
+		prefs.volume = value
+		prefs.save_volume()