Improved Arabic translation:
مكون إضافي للرجع الصوتي VST / AU / RTAS
**Reasoning:**
- "الصدى" (echo) is not technically precise; "الرجع الصوتي" (acoustic/sound reflection/reverb) is the correct professional audio term for reverb.
- The word order (format names + technical term) maintains the original's structure and reads naturally in MSA.
- All technical abbreviations (VST, AU, RTAS) are preserved exactly as specified in the rules.
- The nominal form "مكون إضافي" (plug-in/add-on component) is appropriately concise for UI/product labeling.