M-AUDIO Delta 410 - Manual (Page 23)

source. From the list, select the sample rate closest to that of the S/PDIF input
data. The sample rate selected here will be the only sample rate available to the
software applications. Therefore, you must set your audio software application to
this same sample rate or else the application will display an error message.
NOTE: When S/PDIF In is the master clock source, the digital
monitor mixer will run at the sample rate received at the S/PDIF In.
Since frequency response and sample rate are directly related, the
mixer frequency response will be directly related to the sample rate
of the S/PDIF input data.
MULTITRACK DRIVER DEVICES: The Delta 410 drivers intelligently synchronize
the beginning of recording and playback across all audio devices on the board. When
using application software that is capable of using multiple channels simultaneously,
select "Single and In-Sync" to ensure that all audio channels will begin playback
and/or recording at the same time. Otherwise select "Independent" to allow the audio
channels to play independently – this setting may be desirable if more than one
application needs to access the Delta 410 simultaneously.
The selection “Multi-card Sync” will remain grayed out until a second Delta PCI card
(of which there are a variety) is installed in the system. When you wish to synchronize
two (or more, up to four) Delta cards, select Multi-card Sync on the second and
successive cards. Then, select S/PDIF as your master clock, and connect the S/PDIF
output of the first card to the S/PDIF input of the second card, etc. This ensures that
when the application goes into record or playback, it waits until all audio ports are
open before it commences with recording or playback of audio.
DMA BUFFER SIZES: This section specifies the amount of system memory
dedicated to digital audio buffering. Setting a buffer size that is too small may
result in clicks or pops in the audio stream as some data may be lost. Larger
buffers cause slightly more latency but prevent the pops and clicks that might
occur with smaller buffer sizes – the default settings are recommended but you
may desire to tweak these default settings to suit your tastes. This buffer size
must be set in the Delta Control Panel before you launch your music software.
When using ASIO with the Delta 410, set the buffer size in the control panel,
then exit the control panel. After doing so, launch your music software.
VARIABLE OUTPUT LEVELS: Two selections are available for setting the
output line level for all of the Delta 410 analog output ports. Eight faders are also
available for setting each level individually while the “Mono” radio button is
selected, or in stereo pairs after selecting the “Stereo” radio button.
Clicking the button labeled “Consumer”will snap all of the eight faders to their
maximum setting. This represents a line level of -4dBV, and will work well when
interfacing with audio gear that can accept a slightly hotter input signal. The
Consumer setting does not actually increase the output level, but rather gives the
Delta 410 more headroom in order to output a hotter signal.
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