🥁 LetDrum 功能截圖LetDrum Screenshots

選一首歌，數 4 拍後音符從三條軌道落下：星星＝Hi-Hat、三角＝小鼓、方塊＝大鼓。音符落到底線就按對應的大按鈕，命中率達 70% 就過關。Pick a song; after a 4-beat count-in, notes fall down three lanes — star = Hi-Hat, triangle = Snare, square = Kick. Tap the matching button as each note reaches the line; clear it at 70%+ accuracy.

每次結束看星星與命中統計。命中 ≥ 92% 且拍點很準＝3 星、≥ 72%＝2 星。「Median」是你平均早或晚幾毫秒，數字越小代表打得越準。See stars and hit stats after each run. 92%+ with tight timing = 3 stars, 72%+ = 2 stars. "Median" is how many milliseconds early or late you tap on average — the smaller, the tighter.

拿鼓棒敲桌子或練習墊，App 用麥克風「聽」你的節奏。耳朵圖示下的數字即時累計偵測到的敲擊次數（onsets）。聲音不錄音、不上傳，只看拍點的時間。Drum on a table or practice pad while the app listens through the mic. The counter under the ear tallies each strike (onset) it detects live. The audio is never recorded or uploaded — only the timing.

一台裝置、兩個人輪流。輪到家長時先打 4 拍（上方圓點會一顆顆亮起），再換孩子照樣打回來，三回合交換角色。不用麥克風、不計分，聽彼此的節奏就好。One device, take turns. On the parent's turn, tap a 4-beat phrase (the dots light up one by one), then the child echoes it back — swapping roles over 3 rounds. No mic, no scoring, just listen to each other.

自由拍打的真鼓採樣：Hi-Hat、小鼓、大鼓。可多指同時拍，按越大力聲音越大，還有輕微震動回饋。沒有計分，想怎麼打都行，也有示範節奏可以跟著玩。Free-play pads with real drum samples — Hi-Hat, Snare, Kick. Multi-touch, press harder for a louder hit, with light haptics. No scoring — just play, or follow the built-in demo grooves.

樂理樂園的第一課。點音符積木（♩＝1 拍、♪＝½ 拍）把一個 4 拍小節填滿，湊滿會顯示「小節滿了！」，再進「小測驗」選出正確答案，就能拿經驗值和金幣。The first Theory Garden lesson. Tap note-value blocks (♩ = 1 beat, ♪ = ½) to fill a 4-beat bar until it reads "bar full," then answer the Quiz to earn XP and coins. Teaches note values.

樂理樂園裡用動物學音符長短：大象走一步＝♩（1 拍）、狗狗跑兩步＝♪♪、老鼠碎步最快（十六分音符）。先看示範，再把動物拍點填滿一個小節，然後進小測驗。A Theory Garden game that teaches note lengths with animals: the elephant stomps ♩ (1 beat), the puppy trots ♪♪, and the mouse scurries fastest (sixteenths). Watch the demo, fill the bar with animal beats, then take the quiz.

樂理樂園裡教「休止符」的一課：看到休止符（❓方塊）就要安靜、先不敲，讓怪獸繼續睡。看完示範後重建節奏，測驗會問「看到休止符要做什麼」。A Theory Garden lesson about rests: when you see a rest (the ❓ block), stay quiet and don't play so the monster keeps sleeping. Watch the demo, rebuild the rhythm, then answer the quiz.

顯示 App 版本資訊；所有大人才需要的選項，都收在「For Grown-Ups」按鈕後面的家長閘裡。Shows the app version info; every grown-up option lives behind the "For Grown-Ups" parental gate.

要先答一題乘法才能進來（防止小孩亂按）。裡面可設定解鎖時間、立刻上鎖、切換中／英語言、看更多 rexcode App 與音源出處。解鎖只存在記憶體，關掉 App 就自動重新上鎖。Answer a multiplication question to enter (keeps little ones out). Set unlock time, lock now, switch language, browse more rexcode apps, and view sample credits. The unlock is memory-only — closing the app re-locks it.

同一套落下音符關卡，在 iPad 大畫面上軌道更寬、拍點更好看清，適合放桌上親子一起打。The same falling-note level with wider lanes on iPad's big screen — easier to read the beats, great for playing together on a table.

拿鼓棒敲桌子或練習墊，App 用麥克風「聽」你的拍子。三種課：單拍走路（穩定打）、速度階梯（過關就 +4 BPM）、聽一句打一遍（先聽 App 再打回來）。Drum on a table or practice pad while the app listens via the mic. Three lessons: Steady Steps (keep steady), Speed Ladder (+4 BPM each pass), Echo Time (the app plays a phrase, then you repeat it).

「換你打」時，App 只偵測每一次敲擊的瞬間（onset）來抓節奏，畫面即時累計次數。聲音本身不錄音、不上傳、不儲存，只看拍點的時間。On "your turn," the app only detects the moment of each strike (an "onset") to judge rhythm, counting them live. The sound itself is never recorded, uploaded, or stored — only the timing.

一台裝置、兩個鼓手。家長先打 4 拍，孩子照樣打回來，三回合輪流交換角色。不用麥克風、不比誰準，聽彼此的節奏、一起笑就好。One device, two drummers. A parent taps a 4-beat phrase, the child echoes it back, swapping roles over 3 rounds. No mic, no scoring — just listen to each other and have fun.

iPad 上的自由拍打鼓組，鼓面更大更好打。多指同時拍、按越大力越大聲，適合小手直接用手掌敲。The free-play kit on iPad, with bigger pads that are easier to hit. Multi-touch, press harder for a louder sound — perfect for little hands.

關卡或麥克風練習結束後的星星與命中統計（這張是速度階梯 Speed Ladder）。Median 顯示你平均早或晚幾毫秒，越小越準。Stars and hit stats after a level or mic lesson (this one is Speed Ladder). Median shows how many ms early or late you play on average — smaller is tighter.