Audio compare

How it works

Content mode detects one overall time offset and compares decoded sound in short windows with tolerance. Strict mode compares samples. A/B playback follows aligned time.

Approximate comparison after one detected global offset. A 20 ms window is red if its per-channel RMS error exceeds both the selected percentage of the louder signal and 0.001 full scale. Smaller differences are blue; unpaired audio is purple. No loudness normalization, speech recognition or alignment of internal edits. Codec support depends on the browser.

Steps

1. Open or drop two or more audio files. Choose reference A and candidate B; additional tracks compare against the same reference. Select content or strict-sample mode, then use the range controls and A/B playback.
2. Read the result, then use the previous and next difference controls. Adjust rules when the default comparison does not match your task. Keep a downloaded copy of work you need to retain.

Settings

Reading results

No important differences means agreement within the selected mode and rules. It does not establish identical file bytes, identical appearance or identical metadata. Check the relevant modes separately.

Important changes

Red marks changes considered important by the active rules. Text insertions and deletions also use the important-change color.

Minor changes

Blue retains changes treated as minor, such as ignored whitespace or differences within a tolerance. It does not mean the original data is identical.

Only on one side

Purple identifies content present on only one side where the comparison uses that category, such as an unmatched file or audio segment.

Not checked

Unchecked means the current mode or source cannot establish equality. Missing formula caches and unsupported content must not be read as equal.

Reports and downloads

Use the report or download control provided by the current comparison. Text and Office reports describe comparison rules; CSV uses tabular output, and visual comparisons can export images or PDF reports. A report is not an editable replacement for the original Office document. Display filters and report scope are separate.

Comparison limits

No speech recognition, loudness normalization or alignment of multiple internal edits. Decoding depends on the browser.