Firstly for the purpose of this tutorial, you need to set up your sampler so that Aftertouch controls the Filter Cutoff frequency. If you are using Halion, follow mt tutorial in the Halion folder.

1. The first thing to do is choose a midi track, set up the voice for it as you usually do. Make sure it is a long sound or pad.

Double click on the channel between the left and right locators to create a part in the arrange window.Double click the part to edit it (Or select it once and press control-e).

2. In the editor, draw a note (select pencil from the right click menu) which spans between the indicators, and make sure that you have loop turned on on the transport bar. Next press play, the note should be audibly playing in a loop.

3. At the bottom of the keyboard on the left hand side of the editor is a button, which when clicked on gives you a list of controllers to choose from. Select aftertouch from this list.

4. At this point make sure that the snap box at the top is set to 16. (You can set this to any value you like, however for the purpose of this tutorial it must be activated.

5. Making sure you have the pencil tool selected, hold the Alt key and then draw a bar along the bottom. A small bar represents less aftertouch, and a tall bar more aftertouch. The snap value set in the previous step to 16, creates bars in sixteenths, and as you should be able to hear yourself, allows you to build frequency arpeggiations. Once you have defined the bars, you can edit them without using the Alt key.

6. You can also use this method to create sweeps by simply turning off the snap value, and of course you can use combinations of both to create complex rhythms.You can do this with any other control change that your sampler/synth will respond to by simply selecting the appropriate value demonstrated in step 2