Published by PitchChanger · Updated · How these guides are made
How to use this workflow
Define what the learner must identify
Choose one distinction: higher versus lower, interval size, or whether a note returns to the reference. Do not ask a beginner to identify interval, key and instrument simultaneously. Use your own instrument or voice so the reference can be redistributed with permission. Record the starting note separately from the response and keep the answer key outside the learner copy.
Prepare and verify the file
Leave a short response gap after the pair, then replay the reference before a second attempt. Save a teacher version with labels and a learner version without the answer spoken first. PitchChanger records a microphone; it does not generate an interval quiz or grade a learner. A transformed recording may introduce artifacts, so preserve the unprocessed take.
Original worksheet: define what the learner must identify
An original planning example uses A3 at 220 Hz followed by E4 at approximately 329.63 Hz in equal temperament. The ratio is 2^(7/12), approximately 1.4983. This is a perfect-fifth construction, not a claim that an unmeasured sung take is in tune. If you record the example, verify the intended notes with your instrument before calling it an answer key.
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| Item | Value or check | Interpretation |
|---|---|---|
| Reference | A3, 220 Hz | State the starting note |
| Response | E4, about 329.63 Hz | Seven semitones above |
| Learner answer | Upward perfect fifth | Reveal after response |
Use the worksheet with the actual tool
The example is an authored procedure or calculation, not a measured recording or a claim of successful device testing. Replace proposed positions and observations with your own checked results. Keep the original and reopen the saved output before relying on it.
Common questions
Can a key detector grade this exercise?
A song-key estimate does not establish the accuracy of a two-note interval response. Use a stated answer key and check the actual notes.