Published by PitchChanger · Updated · How these guides are made
How to use this workflow
Record the file properties
Keep the source and download unchanged. Inspect their sample rates, channel counts, frame counts and displayed durations in an external audio inspector. Distinguish the source file from a resampled working buffer. PitchChanger’s four-stem downloads are 44.1 kHz stereo WAV; an input can have different properties.
Equal duration with different counts
These values describe invented exactly ten-second PCM files. At 48 kHz, ten seconds contain 480,000 frames; at 44.1 kHz they contain 441,000. Both stereo files contain twice as many channel samples as frames. A smaller frame count therefore does not establish a shorter recording.
Swipe or scroll sideways to read all columns.
| File assumption | Frames | Rate | Duration |
|---|---|---|---|
| Original PCM example | 480000 | 48000 Hz | 10 s |
| Resampled example | 441000 | 44100 Hz | 10 s |
| One frame shorter | 440999 | 44100 Hz | 9.999977 s |
Check the tail separately
A rounded 10.00-second display can conceal a frame-level difference. Conversely, extra silent frames need not mean missing music. Compare the last audible event and the file boundary separately. Never remove trailing silence from one stem merely to make its visible waveform as short as another; that can damage a common delivery length.
Escalate an actual mismatch
If a substantial difference remains, recheck the selected source, download revision and whether trimming or speed changes happened before separation. Keep a table for all four outputs and the input. A matching duration proves neither alignment nor correct content; use musical landmarks as a second check.
Common questions
Can equal displayed durations prove alignment?
No. Rounded displays can hide small differences and clips can begin at different positions. Check frame counts and audible landmarks separately.