Pitch Recognition Practice
Listen to A4 at 440 Hz and confirm audibility, then practice twelve note names or thirteen ascending intervals. Choose a four-partial tone, sine or triangle and a starting octave of 3, 4 or 5. Answers unlock only after playback ends; no ability grades are assigned.
Key features
- Separate decks of twelve note names and thirteen ascending intervals
- A4 at 440 Hz check with explicit listening confirmation
- Four sine partials at 1/n amplitudes, plus sine and triangle options
- Low default volume with smooth ADSR envelopes
- Playback, stop, replay and answers gated on completed playback
- A complete MIDI 0–127 note, octave and Hz reference table
How to use
- Choose note names or relative intervals, starting octave, waveform and volume.
- Play A4 at 440 Hz; confirm only if you actually heard it.
- Start a shuffled session or known example, then press play.
- Choose a note name for a single tone, or the interval from the first tone to the second.
- Review the answer, frequency and completed play count before the next card. Settings changes reset the session and listening check.
Use cases
- Practice recognizing individual note names
- Learn ascending intervals from unison to an octave
- Compare a four-partial timbre with simple waveforms
- Look up MIDI notes, octaves and frequencies
- Review replay counts and answers from one session
Frequently asked questions
Does this certify or grade absolute pitch?
No. An A4 reference is provided, and replay and answer review are allowed. Strategies such as remembering a reference or comparing intervals are not controlled. Results are session answer records, not certified ability, percentiles or diagnosis.
How do the two modes differ?
Note-name mode shuffles the twelve semitones C through B in the selected octave. Relative mode shuffles thirteen ascending intervals from zero to twelve semitones and varies the starting note for each question. Two tones play with a gap of roughly a quarter-second. Both must finish before you answer.
Why is the A4 check required?
Software playback completion cannot confirm actual output or listening. You must play A4 at 440 Hz and confirm that you heard it before starting. If silent, check output selection, device volume, browser permissions and iOS mute settings. Failed or interrupted playback does not complete the check.
What tuning and synthesis are used?
The tool uses twelve-tone equal temperament with A4 = 440 Hz and f = 440 × 2^((MIDI−69)/12). The default mixes four sine oscillators at harmonics one through four with 1/n amplitude ratios, normalizing their total gain. It applies an ADSR envelope; sine and triangle options are also available. No recorded music samples are used.
What do examples and the frequency table show?
The note-name example ascends from C to B in your selected octave. The fixed interval example starts with C to G, a perfect fifth. Both are labeled as known demonstrations. The table lists MIDI 0–127 across octaves −1 to 9, with dashes outside that range. It does not play those very low or high reference frequencies.
What happens when I stop, change settings or leave?
Changing mode, octave, waveform or volume stops sound and resets both answers and the A4 check. Stop, hidden tabs, audio interruption and page exit cancel pending tones. Incomplete playback does not count; an unfinished first play leaves answers locked. Records exist only in page memory, without microphone access, uploads or automatic storage.
Privacy
Settings, answer choices and playback counts remain in this page’s memory. They are not automatically stored or sent to a server or tool analytics events. Audio is synthesized locally; no microphone, recording or music file upload is used.
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