Published by PitchChanger · Updated · How these guides are made
How to use this workflow
Locate the passage
Write the candidate note together with its octave. Check the octave convention used by your instrument or notation software.
Compare the evidence
Compare the phrase on a known instrument at both plausible registers. Keep playback comfortable; loudness is not proof of the lower octave.
Save a usable reference
Listen to transitions and neighboring notes in the original mix. Mark the register uncertain when the fundamental and musical context do not resolve it.
Worked example and evidence boundary
Using A4 = 440 Hz equal temperament, E1 is approximately 41.20 Hz, E2 is 82.41 Hz and E3 is 164.81 Hz. A component near 82.41 Hz could be an E2 fundamental or the second harmonic of E1. Frequency alone does not identify which explanation applies. These are calculated references, not detector results.
What to verify before using the result
The guitar tuner is designed for single-string microphone input and is not a file-based bass transcription tool. The key detector reports an overall key estimate, not a sequence of bass notes. Use exported bass audio as a reference and verify with an appropriate external instrument or editor.
Common questions
Does a detected song key confirm the bass octave?
No. An overall key estimate does not establish the register of an individual bass note.