Manual Lynx Aurora LT-TB (page 46 of 55) (English)

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in the amount of latency that a user will experience when using the Aurora-TB. See 8.3.1.4

Controlling Latency by Changing the Buffer Size

2. Latency – Displays the amount of latency in milliseconds that is the result of the selected

buffer size at the active sample rate.

3. Double Buffer Output – When checked, an additional output buffer is used. This does

increase playback latency, but relieves some strain on the CPU. It is ON by default and

recommended, especially if any performance issues are encountered.

4. Ignore Direct Monitor Requests - This switch causes the LT-TB driver to disregard

Direct Monitor commands from an ASIO software application. Since Direct Monitor calls

can assign and mute monitor sources in the Lynx Mixer, setting this parameter to “ON”, can

prevent mixer settings from being changed when an ASIO application is launched.

5. DM Uses Active Devices - This switch sets the Direct Monitoring scheme for the

application. When unchecked, all devices (active or not) may be used for Direct Monitoring.

When checked, only active devices, or devices assigned to software busses, are used for

Direct Monitoring. This gets around a problem where Cubase & Nuendo might select the

wrong Direct Monitoring input or output if non-contiguous devices are active.

This switch is ON by default for Nuendo 2 & 3 and Cubase 2 & 3 and OFF by default for all

other applications.

6. Maximum Channels – This switch determines how many ASIO device channels will be

available to the application. This is an application specific parameter. If different ASIO

applications are used at different times, it is possible to have them set differently.

The primary purpose for this switch is to increase CPU efficiency and to facilitate multi-

client operation. The default state is “unlimited”, which means that as many Lynx channels

are presented to the Operating System, a corresponding number of ASIO devices will appear

to the software. For instance, if one has 4 Aurora interfaces running in 16-channel mode, then

64 ASIO channels will be presented to the audio software.

Most audio software allows the user to specify how many ASIO devices are used, generally

in a settings or options menu. There are some applications however that grab control over

ALL of the ASIO devices in the system. This can be problematic because it uses more CPU

power than is necessary, and also because there are no driver devices available to be used by

another application (multi-client operation).

In these cases, setting the MAXIMUM CHANNELS switch to the desired number of

channels, frees up some CPU overhead, and allows another application to access the channels

that the ASIO application is not using.

8.3.1.4 Controlling Latency by Changing the Buffer Size

Latency in an audio interface can be defined as the time required to process a sample from an

application to the interface’s audio output. A number of factors determine the achievable

latency performance of an Aurora/ TB system: processor speed, operating system, sample

rate, number of utilized record or play channels, system efficiency, etc.

Latency can be manipulated by changing the size of the buffers used to transfer data to and

from the LT-TB. The higher the buffer size, the less work the computer has to do to stream

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Lynx Aurora LT-TB Manual

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