Soften hard-panned bass for headphone listening with the ffmpeg crossfeed filter on Windows, and…

Guide ID: art_01M7CE8J99JKE1P3P15Q3K867B

Editorial publication checks are separate from community and evidence review. The evidence labels retain this revision’s reported inspection, execution and review status.

Guide title

Soften hard-panned bass for headphone listening with the ffmpeg crossfeed filter on Windows, and check what it did: a script that measures the middle, the side, the bass width and the peak before and after

Coverage

Trying crossfeed on headphone listening from the command line, and checking the result with numbers. A PowerShell script runs the ffmpeg crossfeed filter on a stereo file, writes a WAV or FLAC, then reports how the middle, the bass width and the peak changed. Generated noise and tones with a known side show what each setting does and where the filter surprises.

Example

On generated noise the default settings narrowed the bass by 6 dB and left the middle at the filter's own gain. A higher range moved the effect down rather than up, and at the top it did nothing. On loud square waves the filter pushed the peak above the input's and the written file was cut at full scale. Nothing was listened to. A block size above 0 made ffmpeg crash in many repeats and, in some of the runs that finished, write broken samples, so the script refuses it.

Useful starting points

• Read the peak line first and lower the output level when it warns.
• Leave the block size at 0: the script refuses a larger value because ffmpeg 9.0.2 crashed or wrote broken samples with it in the harness runs.
• Compare with the original on your own headphones at the same loudness.