# all-pass filter

> filter that passes signals of all frequencies with same gain, but changes the phase relationship among various frequencies

**Wikidata**: [Q1431902](https://www.wikidata.org/wiki/Q1431902)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/All-pass_filter)  
**Source**: https://4ort.xyz/entity/all-pass-filter


## References

1. Freebase Data Dumps. 2013
2. Quora
3. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)