What we tested
We generated one mono WAV file at 22,050 Hz with four isolated sine tones: C6 at 1,046.502 Hz, C7 at 2,093.005 Hz, C8 at 4,186.009 Hz, and G8 at 6,271.927 Hz. Each tone lasted 0.9 seconds, with 0.35 seconds of silence between tones. No public recording or named performer was used.
The file went through the local YouTube-to-MIDI converter at its default sensitivity and minimum-note-length controls. The browser completed without console errors and exported a 79-byte MIDI file.
| Input tone | Expected MIDI | Exported pitch | Exported duration |
|---|---|---|---|
| C6 · 1,046.502 Hz | 84 | C6 · 84 | 0.918 s |
| C7 · 2,093.005 Hz | 96 | C7 · 96 | 0.907 s |
| C8 · 4,186.009 Hz | 108 | C8 · 108 | 0.848 s |
| G8 · 6,271.927 Hz | 115 | None | — |
What the result means
The converter kept the intended pitch for every detected tone, including C8. Detection did not continue through the highest tone in this test: the G8 section produced no MIDI note. The exported C8 also had a lower velocity than C6 and C7, even though all four input tones used the same generated amplitude.
That makes the MIDI useful as a starting map of the upper register, not proof that every high note survived. A piano-roll check should look for gaps as well as wrong pitches.
Why high notes need a separate check
A high tone may be brief, quiet, masked by cymbals or noise, or represented differently by a real instrument's harmonics. This clean sine-wave result removes most of those musical complications, so a real recording can behave differently.
How to check a high-register draft
- Solo the upper part if possible. Reduce competing percussion and bright accompaniment before transcription.
- Compare every visible gap. A missing block in the piano roll may be an undetected note rather than a rest.
- Check the octave by ear. High harmonics can make an octave error less obvious on small speakers.
- Add missing notes manually. Preserve the source timing instead of stretching a neighboring note across the gap.
What this test proves—and what it does not
It records the exact output for four generated high sine tones in the current converter. It does not establish one universal cutoff, compare instruments, or predict results for vocals, piano, guitar, synthesizer, percussion, or a dense mix.
For the opposite end of the range, see the low-note test. If notes disappear because they are brief, use the short-note test. For general cleanup, read the extra-note guide.