User Manual

Multichannel Monitoring Tutorial Booklet (M2TB) rev. 3.5.2

Masataka Nakahara : SONA Corporation

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Adjusting the delay between channels is important not only for the broad purpose of correcting the

speaker placement locations, but also for the purpose of maintaining the playback frequency response in

the production environment. For this purpose, it is desirable that you use monitoring equipment that

allows the delay to be adjusted with a precision of greater than 0.025 msec (one sample at fs=48k or

44.1k).

In a playback environment for which all channels are precisely time-aligned at a certain point, a focused

surround playback sound field will be created with that point as its center. Normally, this point will be the

listening point. Once a focused surround sound field has been created, a location-appropriate surround

sound field can be experienced even if you leave the listening point. In this way, creating a clear, time-

aligned listening point does not limit the listening area to a single point, but expands the listening area. In

contrast, a surround playback environment whose focus is not defined will have an unsatisfactory sound

field at all locations, and the “least-worst” point will be the listening point. This means that the listening

area is conversely narrowed.

In an environment in which bass management is being applied, delay adjustments must be applied after

the bass management (speakers, sub-woofer), not before the bass management (channel buses).

The Yamaha DM2000, DM1000 and 02R96 digital consoles allow delay compensation to be adjusted

in detail for each speaker, in steps of 0.02 msec (max. 30 msec).