Stereo image sharpness test

This experiment is try and listen how imbalance of frequency response on various third octave bands change perception of stereo image.

Try if you can sharpen noise to very small point to very strong phantom image by adjusting frequency response balance. Should work on headphones, but also for speakers unless your room prevents you to.

Press play in the panel at the bottom of the screen. The sound sources and the filter buttons appear once audio is running, which can take a few seconds.

The space bar switches the filters in and out while the sound keeps playing. That A/B is the whole test: the difference is easier to hear as a change than as two things you compare from memory.

Balance

Band

Legend:

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

Filters:
<waiting audio context>
Balance:

Info

Filter Q is 0.7, about one octave wide.
The filters used are listed below: 







    





	

		

			
More listening tests:

			
		

	




	

		
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:

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