Can I keep original melody if I alter the lyrics
Yes, it’s possible 
You can keep the original melody while modifying the lyrics.
How do I do that. I saw tab saying keep original melody but when I tried to slide the tab a message came up and said not available still still under development. I couldn’t even upload my voice either, N=Maybe I need to upgrade from free version???
I understand your frustration! You actually don’t need to upgrade your membership. We are launching this feature next week, so it will be available soon without any plan changes.
你好，Tunee 把上傳的歌詞當作參考建議，而不是強制指令。如果你希望完全照你的歌詞和風格來，請在 prompt 裡明確寫清楚，例如「請使用我提供的完整歌詞，不要修改或替換」、「嚴格按照 XX 風格生成」。prompt 的權重是最強的，越具體效果越好。
相關說明：Why didn’t my uploaded lyrics get used in the generated song?
如果還有其他問題，歡迎寄信到 support@tunee.ai。
I upgraded to get more credits as I have updated the lyrics so many times and it keeps changing the melody, the timing etc etc even though I have given specific prompts to keep everything the same. All I want changed is the lyrics which have minor changes and an extra chorus to end the song. What am I doing wrong.
I’m so sorry to hear that the cover feature isn’t working exactly as you expected! I’ve already shared your feedback with our product team, and they’re working hard to refine it until it matches your ideal experience. Happy to help keep you updated on any progress.