Listen effect of group delay on headphones

This experiment is try and listen if adding group delay to sound is audible. Group delay is introduced with allpass filters that do not alter steady state frequency response but introduce group delay for low frequencies. Try piling them up and listen if you can hear transients lose their impact or not, and how about spatial aspect?

Allpass filters and their biquads were generated with VituixCAD.

Hit Start to enable browser start audio. Wait for sound and filter selection to appear, might take few seconds.

Adjust sound volume, 0 - 10. Volume is initially set to 5 to protect your ears. You also need to select an audio source before sound starts.

Audio source

Legend:

Sample rate: <waiting audio context>
Audio: <waiting audio context>
Filters:
<waiting audio context>

First allpass filter:

Second allpass filter:

Info

Filters are IIR filters whose biquads were exported from VituixCAD with 48kHz sample rate and "Generic" DSP system.
The filters used are listed below: 






    



	

		
Credits:

		
Speech sample:

Demonte, Philippa (2019): Speech corpus - example of edited audio: Harvard_L01_S01_0.wav. University of Salford. Media. https://doi.org/10.17866/rd.salford.7857845.v1



Violin sample:

Pätynen, J., Pulkki, V., and Lokki, T., "Anechoic recording system for symphony orchestra," Acta Acustica united with Acustica, vol. 94, nr. 6, pp. 856-865, November/December 2008. [Online IngentaConnect]

https://research.cs.aalto.fi/acoustics/virtual-acoustics/research/acoustic-measurement-and-analysis/85-anechoic-recordings.html



Music:

Happy Clappy Ukulele by Shane Ivers - https://www.silvermansound.com



Music:

Mirã / Lavoura - MM Moods loop, https://bumpfoot.net/foot276.html