diff --git a/client/src/pages/AudioPage.tsx b/client/src/pages/AudioPage.tsx
index 76fea27..cb6f543 100644
--- a/client/src/pages/AudioPage.tsx
+++ b/client/src/pages/AudioPage.tsx
@@ -275,14 +275,14 @@ export default function AudioPage() {
             <div className="flex items-center justify-between">
               <span className="text-[16px] text-white">{dacText.sensitivity ?? "VU 表灵敏度"}</span>
               <span className="text-[16px] font-semibold" style={{ color: "#00FFF6" }}>
-                {localVuSens >= 0 ? `+${localVuSens}` : localVuSens} dB
+                {localVuSens >= 0 ? `+${localVuSens.toFixed(1)}` : localVuSens.toFixed(1)} dB
               </span>
             </div>
             <CyanSlider
               value={localVuSens}
               min={-20}
               max={20}
-              step={1}
+              step={0.5}
               onChange={(v) => {
                 isVuDragging.current = true;
                 setLocalVuSens(v);