Operation Manual

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3.1.2 ASIO Application
When using an application that supports the ASIO driver standard, one must specify the Lynx ASIO driver as the
active audio device from within the audio software. Once that is established, eight stereo input and output devices will
be available for use within the application.
When using an ASIO compatible program, the appropriate ASIO device must be selected from a settings or options
menu in the application. The correct choice would be “Lynx ASIO”
Many ASIO applications provide access to an ASIO Control Panel for the device being used. For an LT-TB equipped
Hilo, this button will launch the Lynx ASIO Control Panel.
From this panel, the ASIO buffer size and system latency can be established
conveniently within the audio software application. The following parameters can be
altered from the Lynx ASIO Control Panel:
1. Buffer Size - This control allows the size of the ASIO buffer in samples to be
established. The buffer size is the primary factor in the amount of latency that a user
will experience when using the Hilo/TB. In the next section this is explored in depth.
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 Hilo, 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 with a Hilo/TB 8 stereo devices.
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.