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Sync Reference pop-up
This setting is used to select a method of “synchronizing” the MIDI playback to the
audio. There are two different methods:
• Sample Position
This is the preferred setting if your card supports it. In this mode the number
of samples played are reported from the card to Cubase VST and this number
is used for synchronizing the MIDI playback. This is equivalent to synchroniz-
ing to a sample accurate external clock.
Unfortunately, not all audio cards support this method. If the documentation
for your audio card is unclear on this point, try selecting Sample Position as
sync reference method, and use the Check Buffers and Sync method to deter-
mine whether it works properly (see page 377).
• DMA Blocks
This should only be used as a last resort. In this mode, the reference between
audio and MIDI is determined by the rate at which the data blocks are being
transferred by Direct Memory Access (DMA) to the audio card during record-
ing and playback (yes, this is a heavy technical explanation, but this is a very
technical issue!).
For this mode to work properly, the Audio Buffers setting must be in accord-
ance with the real blocksize used in the system. Use the Detect Buffer Size
function to achieve this (see page 376).
On the pop-up menu, you will find four options:
Sample Position
Output
Selects the uppermost Port that is activated on the Output Port
list for Sync Reference, using the Sample Position method.
DMA Block
Output
Selects the uppermost Port that is activated on the Output Port
list for Sync Reference, using the DMA Block method.
Sample Position
Input
Selects the uppermost Port that is activated on the Input Port
list for Sync Reference, using the Sample Position method.
DMA Block
Input
Selects the uppermost Port that is activated on the Input Port
list for Sync Reference, using the DMA Block method.
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