diff --git a/studio/backend/utils/datasets/model_mappings.py b/studio/backend/utils/datasets/model_mappings.py
index 56e8ea70c1..fda8303a30 100644
--- a/studio/backend/utils/datasets/model_mappings.py
+++ b/studio/backend/utils/datasets/model_mappings.py
@@ -351,6 +351,13 @@ TEMPLATE_TO_MODEL_MAPPER = {
         "unsloth/Qwen3-30B-A3B-Thinking-2507",
         "Qwen/Qwen3-30B-A3B-Thinking-2507",
     ),
+    "qwen3.5": (
+        "unsloth/Qwen3.5-0.8B",
+        "unsloth/Qwen3.5-2B",
+        "unsloth/Qwen3.5-4B",
+        "unsloth/Qwen3.5-27B",
+        "unsloth/Qwen3.5-35B-A3B",
+    ),
     "zephyr": (
         "unsloth/zephyr-sft-bnb-4bit",
         "unsloth/zephyr-sft",
@@ -419,6 +426,10 @@ TEMPLATE_TO_RESPONSES_MAPPER = {
         "instruction": "<start_of_turn>user\n",
         "response": "<start_of_turn>model\n",
     },
+    "qwen3.5": {
+        "instruction": "<|im_start|>user\n",
+        "response": "<|im_start|>assistant\n<think>\n",
+    },
     "qwen3-instruct": {
         "instruction": "<|im_start|>user\n",
         "response": "<|im_start|>assistant\n",
diff --git a/studio/setup.ps1 b/studio/setup.ps1
index 6597fc6746..61db138ee4 100644
--- a/studio/setup.ps1
+++ b/studio/setup.ps1
@@ -526,7 +526,31 @@ if ($NeedNode) {
 Write-Host "[OK] Node $(node -v) | npm $(npm -v)" -ForegroundColor Green
 
 # ============================================
-# 1g. Python (>= 3.11 and < 3.14, matching setup.sh)
+# 1g. FFmpeg (required for audio model support)
+# ============================================
+$HasFFmpeg = $null -ne (Get-Command ffmpeg -ErrorAction SilentlyContinue)
+if (-not $HasFFmpeg) {
+    Write-Host "FFmpeg not found -- installing via winget..." -ForegroundColor Yellow
+    $HasWinget = $null -ne (Get-Command winget -ErrorAction SilentlyContinue)
+    if ($HasWinget) {
+        try {
+            winget install -e --id Gyan.FFmpeg --source winget --accept-package-agreements --accept-source-agreements 2>&1 | Out-Null
+            Refresh-Environment
+            $HasFFmpeg = $null -ne (Get-Command ffmpeg -ErrorAction SilentlyContinue)
+        } catch { }
+    }
+    if (-not $HasFFmpeg) {
+        Write-Host "[WARN] FFmpeg could not be installed automatically." -ForegroundColor Yellow
+        Write-Host "       Install FFmpeg from https://ffmpeg.org/download.html and re-run." -ForegroundColor Yellow
+    } else {
+        Write-Host "[OK] FFmpeg installed: $(ffmpeg -version | Select-Object -First 1)" -ForegroundColor Green
+    }
+} else {
+    Write-Host "[OK] FFmpeg found: $(ffmpeg -version | Select-Object -First 1)" -ForegroundColor Green
+}
+
+# ============================================
+# 1h. Python (>= 3.11 and < 3.14, matching setup.sh)
 # ============================================
 $HasPython = $null -ne (Get-Command python -ErrorAction SilentlyContinue)
 $PythonOk = $false
diff --git a/studio/setup.sh b/studio/setup.sh
index 31facb4b62..16df19df12 100755
--- a/studio/setup.sh
+++ b/studio/setup.sh
@@ -97,6 +97,29 @@ fi
 
 echo "✅ Node $(node -v) | npm $(npm -v)"
 
+# ── 4b. Check / install FFmpeg (required for audio model support) ──
+if command -v ffmpeg &>/dev/null; then
+    echo "✅ FFmpeg found: $(ffmpeg -version 2>&1 | head -1)"
+else
+    echo "⚠️  FFmpeg not found — installing..."
+    if command -v apt-get &>/dev/null; then
+        sudo apt-get update -y > /dev/null 2>&1
+        sudo apt-get install -y ffmpeg > /dev/null 2>&1
+    elif command -v yum &>/dev/null; then
+        sudo yum install -y ffmpeg > /dev/null 2>&1
+    elif command -v brew &>/dev/null; then
+        brew install ffmpeg > /dev/null 2>&1
+    fi
+    if command -v ffmpeg &>/dev/null; then
+        echo "✅ FFmpeg installed: $(ffmpeg -version 2>&1 | head -1)"
+    else
+        echo "⚠️  Could not install FFmpeg automatically."
+        echo "   Audio model support requires FFmpeg. Install it manually:"
+        echo "   Ubuntu/Debian: sudo apt-get install ffmpeg"
+        echo "   macOS: brew install ffmpeg"
+    fi
+fi
+
 # ── 5. Build frontend ──
 echo ""
 echo "Building frontend..."