Perf: fix audio playback stuttering by increasing pre-buffer to 5 chunks and optimizing multi-speaker synchronization without forced gaps

station_broadcast.lua

@@ -2,7 +2,7 @@
 -- ============================================================================
 -- 1. Configuration & Constants
 -- ============================================================================
-local APP_VERSION_TEXT = "v1.0.17"
+local APP_VERSION_TEXT = "v1.0.18"
 
 local CONFIG = {
     CLOUD_URL = "ws://stabadmin.fse-media.group",
@@ -14,7 +14,7 @@ local CONFIG = {
     DISK_AUDIO_STATION = "disk/Audio/Station/",
     STATION_IDENTITY_FILE = "station_identity.cfg",
     AUDIO_VOLUME = 3,
-    AUDIO_STREAM_PREROLL_CHUNKS = 2,
+    AUDIO_STREAM_PREROLL_CHUNKS = 5,
     DEBUG = true
 }
 
@@ -1611,6 +1611,12 @@ function Audio.playWavStreamItem(item)
     end
 
     local playSeq = State.interruptSeq
+    
+    -- Ensure all speakers are completely empty and synced before starting the new stream
+    if not waitForNativeSpeakersEmpty(Peripherals.speakers, playSeq) then
+        return
+    end
+
     local source = item.audioData
     local streamObj = nil
 
@@ -1663,12 +1669,7 @@ function Audio.playWavStreamItem(item)
                     tonumber(meta and meta.channels) or 0,
                     tonumber(meta and meta.bitsPerSample) or 0
                 ))
-                local playOk
-                if #Peripherals.speakers > 1 then
-                    playOk = queueSamplesSynchronized(samples, CONFIG.AUDIO_VOLUME, playSeq)
-                else
-                    playOk = playChunkOnSpeakers(samples, CONFIG.AUDIO_VOLUME, playSeq, false)
-                end
+                local playOk = playChunkOnSpeakers(samples, CONFIG.AUDIO_VOLUME, playSeq, false)
                 if not playOk then
                     Audio.stop("current")
                     return