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Bink Audio Test WarblesThe original Bink Audio Test warbles to align main speakers to subwoofers by ear when pressed for time or when an analyzer is unavailable are now available for download.

Courtesy of Michael Bink Knowles.

Venuefigure 1An article in response to a series of ProSoundWeb forum posts questioning the necessity of delay speakers.

The default argument in favor of delay speakers appears to be level restoration. The default objections are timing issues and sonic perspective distortion.

This article attempts to explore some serious but often overlooked advantages of delay speakers beyond plain level restoration.

Howard PageEvery now and then, the giants that helped build and shape our industry, stick there neck out and plea for common sense. Howard Page's article about exorbitant subwoofer levels doesn't nearly receive enough attention even though it's more applicable than ever. Reason for me to include it in the study hall section of my website. This is not a campaign against LF emphasis, I love it as much as the next person, but about the way how to achieve it.

The harmonics lead the fundamental"It turns out that, within very generous tolerances, humans are insensitive to phase shifts. Under carefully contrived circumstances, special signals auditioned in anechoic conditions, or through headphones, people have heard slight differences. However, even these limited results have failed to provide clear evidence of a 'preference' for a lack of phase shift. When auditioned in real rooms, these differences disappear..."

Dr. Floyd Toole

59th AES presentation on LFCThis is a transcription of my 40-minute presentation on low frequency control during the 59th AES conference on sound reinforcement in Montreal. Needless to say that 40 minutes is barely enough time to scratch the surface on such an involved topic. I therefore decided to focus on establishing the need for low frequency control, something I felt I could do within 40 minutes, and not attempt to cover each intricacy of the various solutions at our disposal.

I start by briefly refreshing on summation to make sure everybody is on the same page. Next we’ll meet the player commonly referred to as a subwoofer. We’ll continue with establishing the need for low frequency control, the essence of this introduction and finally have a look at current typical solutions.

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