Some tracks which have the Node button activated are not processed on a Node computer.
Although the Node button of some tracks has been activated, the tracks are not processed on the Node computer. This is indicated by the track Node button not turning blue like on other Node tracks.
This could happen for several reasons:
An Audio Instrument with multiple outputs is sent to a Node Audio
Instruments with multiple outputs cannot be processed on a Node. Only mono and stereo is possible.
The Node does not have enough processing power to process the track
If a track is sent to a Node, a previous check assures that the Node CPU has enough free resources to process this specific track. The result of this check may be distorted under certain circumstances and the Node will not process the track although the resources are available.
Example: A very CPU intensive Audio Instrument like the ES2 is sent to a Node with its polyphony is set to 32 voices, while in your arrangement, the ES2 only uses 4 of these voices (and will in fact only need the CPU performance of 4 voices). The Node will however report that it does not have enough processing power to process 32 ES2 voices, although only 4 will be used. As a result, the track is not sent to the Node.
To avoid this, the polyphony of Audio Instruments which shall be processed on a Node should always be adjusted to the number that is actually used in your arrangement.
The track contains a Spreader plug-in
A Spreader plug-in cannot be processed by a Node prior to Logic 7.1, so if the Spreader plug-in is the last plug-in of a track, the track will not be processed by the Node. In Logic Pro 7.1, the Spreader can be processed by a Node. If you use a mixture of plug-ins that can and can't be processed by a Node on the same track, only the node-eligible plug-ins that come after the last non-eligible plug-in in the channel strip will be processed by the node. For example, if you have a channel strip that contains a Space Designer, an Audio Unit, and then another Space Designer, only the second Space Designer will be processed by the node.
The EXS24 cannot be processed by a node, but Logic DSP plug-ins assigned to an EXS24 track can be. If there are no eligible plug-ins on an EXS24 track, it will not be processed by a node.
Audio Unit plug-ins cannot be processed by a node. However, Logic plug-ins inserted on tracks after any AU plug-ins can be processed.
This document will be updated as more information becomes available.