In this video, I show how to build a physical model of a guitar in Reaktor using the Modal Bank module. While the Modal Bank is very complex to use, with a little bit of knowledge about an instrument it becomes possible to create very realistic models.
Click here to view the video on YouTube.
Pro Tip
Create some variations in the Ratios to get more atonal sounds, such as bells!
A Modal Bank contains a number of resonant bandpass filters, which can be used to shape an incoming signal into something similar to what you might get out of a vibrating object, such as a guitar string or a drum. Typically a vibrating object has several modes, also called partials, that combine to define the sound of the instrument.
Fortunately, an ideal string has properties that make it very easy to use with the Modal Bank. The ratios can be ignored, and the amplitudes are all the same. The only parameter that needs special attention is the decay times of the partials. The higher frequencies in a vibrating string decay faster than the lower frequencies. As you can see from the video, this is easy to set up!
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