Calibrating your vocal range and rhythm
The two measurements the training builds on: your vocal range and your personal tap offset — what they're for and when cori suggests a fresh one.
Web + app
The training adapts to you — but for that cori needs to know two things about you and your device: how high and how low you can sing and how much your device delays the sound. cori measures both once and then factors them into every exercise.
Your vocal range decides which register singing exercises sound in. The tap calibration decides whether your rhythm taps count as "on the beat". They aren't connected: if you only practise rhythm you don't need the vocal range, and vice versa. Both are purely personal and are stored only on your device.
Find your vocal range
Without this measurement cori would have to guess which register you sing in — and would have you singing note after note you simply can't reach. The test takes about a minute: "Sing high and low. Hold a note briefly to lock it in."
In the Voice branch the measurement sits right at the top above the path, together with your current range. If nothing has been measured yet, there's just a dash.
It won't work without microphone access: "No microphone access. Allow the mic to find your range."
Sing on "Ah" as low and as high as still feels comfortable. Every note you hold briefly is locked in ("Hold…") — cori only remembers the held extremes, a quick slide doesn't count.
Your range then appears as a pair of notes above the path, something like "C3 – A4". From then on all singing exercises are automatically transposed into that span.
You can repeat the test whenever you like. cori checks first: "Repeat test? Your previous results will be discarded."
Pitch detection runs entirely on your device — in the browser as well as in the app. cori transmits no recording and creates none; all that's analysed is which note is sounding right now. What's left of the test in the end is two values: your lowest and your highest note.
Tap calibration ("Make tapping fair")
Time passes between the moment cori plays a click and the moment you hear it — anywhere from a few milliseconds to nearly half a second, depending on your device and headphones. You tap along to what you hear, and so you're systematically late. The calibration measures exactly that offset, so that "taps that feel right score right".
It takes about seven seconds: you tap along to a steady click, cori records your taps ("{count} taps recorded") and works out your offset from them ("Your tap offset: {ms} ms"). If there were too few taps, cori says so and you try again.
You'll find it in the Rhythm branch right at the top above the path. Until you've calibrated, cori estimates the offset itself — the value then reads "Automatic". You don't need a microphone for the measurement; you just tap on the screen.
Wireless headphones often delay the sound by many times what built-in speakers do. If rhythm exercises suddenly go much worse with Bluetooth headphones: calibrate once in that combination — or switch to wired headphones or speakers for rhythm exercises.
In the app you'll also find the tap calibration under Settings›Practice Mode, together with two related settings: Audio Sync (measures via the microphone how much your device delays playback) and the Headphone Timing Offset for Bluetooth. That's also where you can reset your calibration to "Automatic".
When cori suggests a fresh measurement
cori doesn't nag — it only speaks up when the data itself argues for it, and then at most every three days per measurement:
- A new tap calibration if your taps in a rhythm round drifted systematically in one direction — consistently early or consistently late, not merely imprecise. That's exactly the signature of a wrong offset; missing at random is a practice question and doesn't trigger a suggestion. In a test or a challenge cori never suggests anything.
- A new vocal range test if a singing exercise lost you right at the very top or the very bottom — a sign that the stored range is drawn too wide.
Quite apart from that, it's worth repeating one when something fundamental has changed: new headphones, a new device — or, with younger singers, simply a few months of growth.
What's next?
- The vocal range test in detail: Finding your vocal range
- All the exercise settings: Configuring exercises
- Where the calibrations take effect: Ear, rhythm, voice
- How a round is scored: How a practice round works
- Microphone giving you trouble? The microphone isn't working
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