Published by PitchChanger · Updated · How these guides are made
Hear the difference
Original synthesized diagnostic material, authored at 48 kHz, 16-bit PCM. These are controls for the worksheet, not measurements of this tool or real instruments.
Pause your workspace preview before comparing these clips.
Start quietly. Download the WAV files for external comparison; no listening outcome is asserted.
How to use this workflow
Keep a stereo original
Save the unmodified stereo source. Do not overwrite it with the diagnostic mono copy.
Create an explicit sum
Use an external editor that can average left and right. Record the routing or coefficients rather than assuming a mono button uses the same gain.
Compare content and balance
Listen for missing voice, bass or effects. Separate a whole-file level change from selective cancellation.
Two stereo controls with opposite outcomes
In-phase sets L = R = x, using the same faded 440 Hz tone in both channels. Its averaged mono sum is x. Opposite-polarity sets L = x and R = −x; its averaged mono sum is zero. This follows directly from the sample construction and can be recomputed from the downloaded PCM.
Neither control is a real widened mix. They illustrate why equal channel peaks do not ensure mono compatibility. A left-only or right-only playback is not this mono test and will not cancel the opposite-polarity control.
Swipe or scroll sideways to read all columns.
| Checkpoint | Action or value | Interpretation |
|---|---|---|
| Same polarity | (x + x) / 2 = x | Tone survives |
| Opposite polarity | (x − x) / 2 = 0 | Complete cancellation |
| Left channel only | x | Not a summed mono check |
Check the final delivery path
An actual mix may lose only some frequency regions or instruments. Revisit the effect or source routing responsible rather than increasing overall gain to hide the loss. Keep a timestamped note describing the affected part.
The 8D tool creates stereo movement; it does not expose a dedicated mono-compatibility analyzer or user-defined channel-sum matrix. Export the result and perform this defined sum externally before a mono delivery.