User guide

Tracktion 4 Reference Manual
188
9.3 : How To Build Rack Filters
Building A Rack By Hand
As an example of how rack lters are constructed, let’s extend Tracktion’s delay lter to a true stereo
type.
To start off:
• Open the rack editor (keyboard shortcut
CTRL + G, or CMD + G for Mac users).
• Click the
new rack button, and select new empty rack from the pop-up menu.
• Enter
stereo delay in the name eld (Fig. 9.3.1).
For this rack to do anything useful, we need to add some lters to it. Adding lters to racks can be
performed in the same way that you would add lters to a track; drag the new lter draggable icon onto
the rack editor canvas and drop it. Try it now, and when prompted for a lter to add, choose the Delay
lter. When you drop the lter, Tracktion will ask you whether you want to auto-connect it; click the no
button.
If all went well your rack should contain a single lter icon as shown in Figure 9.3.2. This lter will
form one channel of our stereo delay. We now need to add a second delay which will act as the other
channel, so following the same procedure as you used to add the rst lter, add a second delay lter to
the editor.
When building racks it is a good idea to try and place lters tidily and in logical positions, because
while the location of the lter makes no difference to how the rack works, it does make it easier for you
to see what is going on. Filters can be moved around inside the rack editor by clicking and dragging
them to the desired destination. Try moving the two delay icons around until they form a vertical line
roughly half way across the editor panel. This will make it easy to see how the stereo delay works.
Figure 9.3.1
Figure 9.3.2