Always use volume tag if not a fade-in.

Author: JustinFreitas

src/main/kotlin/dev/arbjerg/ukulele/api/PlayerController.kt

@@ -96,6 +96,10 @@ class PlayerController(
             }
         }
 
+        if (body["fadeIn"] == "true") {
+            player.isFadeInArmed = true
+        }
+
         var identifiers = (body["url"] ?: "").split("|")
         // ... (rest of play method logic)
         if (identifiers.isNotEmpty() && identifiers.first().isEmpty()) {

src/main/kotlin/dev/arbjerg/ukulele/audio/Player.kt

@@ -115,6 +115,7 @@ class Player(private val beans: Beans, guildProperties: GuildProperties) : Audio
     var showQueueOnSkip: Boolean = beans.botProps.showQueueOnSkip
 
     var lastChannel: TextChannel? = null
+    var isFadeInArmed: Boolean = false
 
     private var queueLabelVolume: Pattern = Pattern.compile("^\\s*\\[.*[vV]:(\\d{1,3}).*]?.*$")
 
@@ -197,12 +198,12 @@ class Player(private val beans: Beans, guildProperties: GuildProperties) : Audio
         // Reset the volume to the current guild volume config
         player.volume = scaleVolume(this.volume)
 
-        // Only apply queue label volume if the guild volume is not zero.
-        // This allows the client (e.g. ukulele-remote) to perform a seamless fade-in by
-        // starting the track at zero volume.
-        if (this.volume > 0 && (!beans.botProps.normalization || !track.isReplayGainApplied())) {
+        // Only apply queue label volume if a fade-in is NOT armed.
+        // This allows the client to perform a seamless fade-in by arming it beforehand.
+        if (!isFadeInArmed && (!beans.botProps.normalization || !track.isReplayGainApplied())) {
             adjustVolumeFromQueueLabelVolumeMatcher(player, track)
         }
+        isFadeInArmed = false
         publishState()
     }