posted 24 February 2001 02:48            

hdphstfld.kym

Attached is a Sound for producing a balanced headphone stereo field. It is well known that mixing through headphones increases ear fatigue because each ear hears an unnatural decomposition of sound with separate L and R channels.

This sound works by decomposing the stereo L/R pair into middle/side channels. Then M channel is passed equally to L and R outputs, but the S channel is modified by subtracting a delayed version of itself (800 usec). The left output channel is then M + S', while the right output channel is M - S'.

This requires the use of only one delay line, and it avoids the comb filtering artifacts on mono or strongly centered stereo sounds that would be produced by adding delayed L and R channels to their opposites. There is still some comb filtering occuring here, but it is confined to the S channel. So far, except for pure noise tests, I have been unable to detect the comb filtering.

The result of using this Sound is to present the whole of the stereo field to each ear, just as speakers would, while preserving spatial location by means of the delay. As a result my brain is not being pulled left and right when a sound has only an L or R component. I find that I can listen comfortably longer with this processing.

- DM

posted 14 August 2001 14:14            

Any chance of uploading the file 'hdphstfld.kym' again ,

also thanks again '....

cheers,

jachin


Hi,
Attached is a Sound for producing a balanced headphone stereo field. It is well known that mixing through headphones increases ear fatigue because

quote:

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Originally posted by David McClain:
Hi,

Attached is a Sound for producing a balanced headphone stereo field. It is well known that mixing through headphones increases ear fatigue because each ear hears an unnatural decomposition of sound with separate L and R channels.

This sound works by decomposing the stereo L/R pair into middle/side channels. Then M channel is passed equally to L and R outputs, but the S channel is modified by subtracting a delayed version of itself (800 usec). The left output channel is then M + S', while the right output channel is M - S'.

This requires the use of only one delay line, and it avoids the comb filtering artifacts on mono or strongly centered stereo sounds that would be produced by adding delayed L and R channels to their opposites. There is still some comb filtering occuring here, but it is confined to the S channel. So far, except for pure noise tests, I have been unable to detect the comb filtering.

The result of using this Sound is to present the whole of the stereo field to each ear, just as speakers would, while preserving spatial location by means of the delay. As a result my brain is not being pulled left and right when a sound has only an L or R component. I find that I can listen comfortably longer with this processing.

- DM

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