1. Can you actually trigger notes by using the step sequencer? Or do you need an external midi input in order to start a sequence and the step sequencer only acts like an arppegiator?
The Origin sequencer is an (emulation of an) analog step sequencer. That is it outputs for each track a set of signals: the step value (which can be quantized), one gate (trig) and one 2 segments envelope (accent). Each Program (slot) has its own sequencer, and each sequencer has 3 tracks.
This sequencer does not output MIDI messages (until now at least, maybe someday....).
2. Can you affect the note length of different steps individually? I don't mean the decay but the actually input you give like 1/2th or 1/8 notes.
No. What you can do is:
- when synced to the bpm, you can select the sync ratio (eg 1/4, 1/8...) that is play faster or slower a step being a quarter note, an eigth note, etc... Then all steps are faster or slower.
- adjust some kind of PWM for each step value. With a pwm set to 50% for instance you will get a step reaching its value during the 1st half of the step, and going back to 0 during the 2nd half. This parameter does not change he whole step duration.
- set a swing parameter. A longer step is followed by a shorter is followed by a longer...