So start Reason and load up a new rack. Now first add a synth into the empty bay. For this example I'm going to use Malstrom, which is a graintable synthesizer. It will also allow me to show you how to use Matrix to automate an effect such as Malstrom's filter.
Then right click in an empty space in the rack and load the Matrix pattern Sequencer. Alternately you can select it up in the top nav-bar under "Create".
Now you should see both units in Reason like this:
Reason 3.0 will automatically wire these together for you, so if you press play in Reaosn you will hear Malstrom firing off a steady series of notes. Also the little Run button light up in Matrix and you will see it cycling through the pattern which as of now is just the same note repeating. The fastest way to see how Matrix works is to right click it and choose "Randomize Pattern". Now if you hit play you should hear some crazy random sequence of audio notes. And you will see that the notes and volume values have all changed. To create your own step pattern just click inside the grid and set the notes to what you would like. If you flip the tiny switch labeled 1-5 directly left of the step grid you can cycle through all the different octaves to make high and low musical notes.
If you would like a longer or shorter pattern just change step LED from 16 to what ever value you need. Also turning the Resolution knob changes the note values (8th, 16th, quarter notes, ect..) Matrix lets you lay out up to 32 patterns, so once you've made a pattern you like hit the 1-8 buttons to start a new pattern and then if you fill those you got Bank A-D each containing 8 pattern slots.
The shuffle button lets you adjust the amount of swing in the pattern or loop. Flip it on and then turn the Pattern Shuffle know in the main Reason transport control to add varying amounts of swing.
Next I'll show you how to route the Matrix to control an effect. You do this by first putting Matrix into curve mode. Flip up the little switch from Keys to Curve right above the 1-5 octave switch. Then draw any random curve into the grid to test it out. Now to route this into an effect, sample, or parameter press your Tab key to flip over the Reason rack. Here you can see how all your soft sythns, drum machines, effects, whatever is wired together. So you can patch whatever you want together just like with real audio hardware. On the back of the Matrix you will see a cable insert labeled "Curve CV" this is what you use to send the curve pattern to the parameter of your choosing. Here just to test out the waters quickly since we Malstrom opened up click on the Curve CV insert and drag up into the Pitch insert on the back of Malstrom under the Modulation Input section. You will see that it creates a cable for you to drag and patch into any other unit just like in real life, pretty cool. Now if you hit play you will hear you pattern playing, but this time it's pitch is being modulated with the Matrix curve. Draw new curves in the grid with Reason playing and you'll soon get the idea of how it works.
Remember that you can patch the Matrix Curve CV into any synth, sampler, or effect and control them with it. Try it on filters, distortion, delays for example. Experimenting with drag and dropping cables in Reason 3.0 leads some interesting conclusions sometimes, so load up a bunch of units into the rack and mess around patching things together when you're looking for some inspiration.
Good luck building patterns within Reason 3.0 using Matrix. Once you get the basics down then as with all the audio tools in Reason it will let you dive deeper into your music and create many new sonic textures. Live long and prosper....
Propellerhead Reason 3.0 REsource