fix(music): synchronize multi-speaker wav streaming

Bump the station build to v1.0.5, reduce live WAV chunks to 0.25 seconds, and queue decoded samples in a synchronized multi-speaker mode so multiple speakers stay aligned during streaming playback.

CloudServer/server.js

@@ -324,7 +324,7 @@ async function sendLiveWavChunksToStation(stationName, fallbackWs, task) {
     const sampleRate = 48000;
     const channels = 1;
     const bitsPerSample = 16;
-    const chunkDurationSec = 0.5;
+    const chunkDurationSec = 0.25;
     const chunkBytes = Math.max(4096, Math.floor(sampleRate * channels * (bitsPerSample / 8) * chunkDurationSec));
 
     targetWs.send(JSON.stringify({

station_broadcast.lua

@@ -2,7 +2,7 @@
 -- ============================================================================
 -- 1. Configuration & Constants
 -- ============================================================================
-local APP_VERSION_TEXT = "v1.0.4"
+local APP_VERSION_TEXT = "v1.0.5"
 
 local CONFIG = {
     CLOUD_URL = "ws://stabadmin.fse-media.group",
@@ -612,6 +612,43 @@ local function waitForNativeSpeakersEmpty(speakers, playSeq)
     return true
 end
 
+local function queueSamplesSynchronized(samples, volume, playSeq)
+    if not Peripherals.speakers or #Peripherals.speakers == 0 then return false end
+    if not waitForNativeSpeakersEmpty(Peripherals.speakers, playSeq) then
+        return false
+    end
+
+    local pending = {}
+    for _, sp in ipairs(Peripherals.speakers) do
+        local name = peripheral.getName(sp)
+        if name and type(sp.playAudio) == "function" then
+            pending[name] = sp
+        end
+    end
+
+    while next(pending) do
+        if shouldStop(playSeq) then return false end
+        for name, sp in pairs(pending) do
+            local ok = false
+            pcall(function()
+                ok = sp.playAudio(samples, volume)
+            end)
+            if ok then
+                pending[name] = nil
+            end
+        end
+        if next(pending) then
+            local ev = { os.pullEvent() }
+            if ev[1] == "audio_interrupt" and tonumber(ev[2]) and tonumber(ev[2]) >= playSeq then
+                return false
+            end
+        end
+    end
+
+    Utils.log("INFO", string.format("Audio samples queued in synchronized multi-speaker mode: samples=%d speakers=%d", #samples, #Peripherals.speakers))
+    return true
+end
+
 local function playChunkOnSpeakers(samples, volume, playSeq, waitForDrain)
     if not Peripherals.speakers or #Peripherals.speakers == 0 then return false end
     if waitForDrain == nil then waitForDrain = true end
@@ -1111,7 +1148,13 @@ function Audio.playWavStreamItem(item)
                     tonumber(meta and meta.channels) or 0,
                     tonumber(meta and meta.bitsPerSample) or 0
                 ))
-                if not playChunkOnSpeakers(samples, CONFIG.AUDIO_VOLUME, playSeq, false) then
+                local playOk
+                if #Peripherals.speakers > 1 then
+                    playOk = queueSamplesSynchronized(samples, CONFIG.AUDIO_VOLUME, playSeq)
+                else
+                    playOk = playChunkOnSpeakers(samples, CONFIG.AUDIO_VOLUME, playSeq, false)
+                end
+                if not playOk then
                     Audio.stop("current")
                     return
                 end