🇹🇼 技術深度解析與實戰指南 (Traditional Chinese Guide)
實況主直播唱歌時最怕唱到超出身體負荷的高音或下不去的低音，容易導致破音或聲帶疲勞。傳統點歌只能靠經驗盲猜該降幾 Key。KHelper V3 透過聲學 YIN 頻譜演算法與個人化聲部配對，提供科學化的最佳演唱 Key 推薦。
技術運作原理與架構 (How it Works)
在 UVR 分離出純人聲音軌後，KHelper 啟動 FFT 加速之 YIN 基頻檢測演算法，並透過 Viterbi 動態規劃排除爆破音與八度跳躍雜訊，精準提煉整首歌曲的有效最高與最低音符（如 C3 ~ A5）與關鍵時間點。比對實況主聲部設定後，自動計算並推薦最舒適的升降半音數 (Transpose)，搭配 SoundTouch 高音質變調引擎即時開唱。
標準設定步驟 (Step-by-Step Tutorial)
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設定個人聲部區間：在 KHelper 設定中選擇您的演唱聲部（女高音、女中音、男高音、男中音）或自訂舒適音域。
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一鍵分析音域極限：點擊音軌上的「音域檢測」，系統自動繪製音高分佈圖，標註最高音與最低音時間戳記。
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一鍵套用最佳 Key：點擊推薦升降 Key，系統自動配置 SoundTouch (±12 半音) 變調引擎，開台飆歌輕鬆不破音。
🌐 English Technical Specification & Global Streamer Architecture
Singing out of one's comfortable vocal range causes vocal fatigue, strain, and voice cracks live on stream. Knowing whether a song fits your range—or how many semitones to transpose it—historically required trained ear analysis or painful trial-and-error. KHelper V3 automates this with acoustic YIN pitch tracking and intelligent key recommendations.
Once lead vocals are isolated via UVR, KHelper runs an FFT-accelerated YIN fundamental frequency (f0) estimation across all voiced frames. A Viterbi dynamic programming pass filters out octave jumps and microtonal noise, identifying the song's sustained highest and lowest notes (e.g., D3 to G5). It then evaluates your profile (Soprano, Mezzo-Soprano, Tenor, Baritone, Bass) and calculates the optimal SoundTouch transpose shift (e.g., -2 semitones) so you can sing comfortably.
Quick Setup Guide
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Set Vocal Classification: In KHelper User Settings, select your vocal comfort range or voice type (e.g. Mezzo-Soprano / Tenor).
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Analyze Vocal Range: Click Vocal Range on any separated track. KHelper visualizes note distribution, highest/lowest sustained pitches, and timestamps.
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Apply Recommended Key: Click "Apply Recommended Transpose" to set the real-time SoundTouch pitch shifter (±12 semitones) for strain-free singing.