Frinika will undoubtedly be a confusing experience to anyone who hasn't used a music sequencer before. When it starts the first thing to do, is select the output and input device. Choose to create a new project.
First, click on New > MIDI Out Device and select one of the synthesisers used to generate the sound. Next, select the instruments you want muse, by clicking on the MlDI Mixer tab. Set the volume for each instrument. Click on Null on the Lane Properties and choose the synthesiser that you created earlier. Now that the instruments are in place, you can use the Piano roll to draw bars on the chart.
Click on the Writ:e mol to add bars and right-click on the existing bars to delete them. To preview the tracks, click the Play button on the top of the window. Additional effects can be added using the down arrow icon on the left bottom of the Piano Roll pane. Again, use the Write tool to drag and draw the pattern.