Using techniques like Step Sequencing can open new ways of writing music that take you away from needing to ‘play’ each musical part.
Logix pro x arppegiator full#
From a relatively simple chord sequence, you can create complex machine-like synth lines that sound like full step sequencers. With this, the chords can define the main rhythmic focus and the remaining single-note steps appear to leap around the keyboard, especially when you use some of the larger octave ranges. Map the Velocity dynamically to the synth that’s receiving it, and you can recreate the distinctive effects created by CV sequencers.Īnother neat feature of the Arpeggiator Grid mode is the ability to specify whether each step is set to single note, or the full chord. In this example, the Arpeggiator’s Grid works like a CV Sequencer, with each step having its own Velocity setting.
The Arpeggiator MIDI Effect Plug-in, for example, works as a hybrid Arpeggiator and Step Sequencer, assuming the Grid function is engaged. It’s well worth exploring other parts of Logic Pro X that exploit machine-driven music creation. To achieve the right audible response from Retro Synth, you need to balance Cutoff with the amount of Velocity-tracked filter modulation, set using the Velo fader in the filter section. Once the notes are flattened, select three or four notes in the sequence (possibly the notes you’ve applied the Slide to) and raise their velocity to 127. To achieve this, we first need to flatten the MIDI velocities, which is probably quickest done using the MIDI Transform Window using the Fixed Velocity present. Next to consider is Accent, which would raise both the amplitude and amount of filter modulation applied for ‘Accented’ steps. We can approximate Slide by extending the length of some of the notes in the sequence, which in turn, work with the legato and glide settings established on Retro Synth. On the TB-303, pressing the Slide button would join two steps together – ignoring the filter trigger on the second step and also applying a small amount of portamento between the notes. The next steps are vital to a real 303-like authenticity and involve understanding both the Slide and Accent controls. For a basic 303-type sequence, enter a 16-step 1/16 sequence, with a succession of notes that would form a typical bassline sequence – octaves, fifths, minor thirds and so on. If you want to change the rate from the default 1/8th setting, open the Step Input Keyboard and vary the note setting accordingly. Once engaged, press a key on your MIDI keyboard to assign a pitch for each step, or press down on a sustain pedal (if you have one attached) to enter a silent step.
Clicking on the MIDI In icon will engage a step-time sequence. Logic’s step-time sequencing is found as part of the Piano Roll editor. This will help create the distinctive glide effect that’s intrinsic to a TB-303 sequence. The most important element is to ensure Retro Synth is set to monophonic legato mode (also disabling any unison voicing) with a small amount of Glide. The envelopes are also straightforward, with a Gate for the amplifier, and a simple A/D setting for the filter. The sound uses just a single oscillator, set to either a Square or Sawtooth waveform, which is shaped by a resonant low-pass filter. Replicating the sound of a TB-303 using Retro Synth requires little more than a few tweaks to the basic preset. Replicating the classic TB-303 sound, therefore, requires both an understanding of its synthesis architecture and the unique features of its step sequencer.
For the uninitiated, the Roland TB-303 was originally designed as a ‘budget’ combination of step sequencer and synthesiser, with a relatively simple control set that lent the unit an instantly recognisable sound. We’re going to explore the process of step sequencing by recreating the sound and performance of a TB-303. At its heart, of course, a step sequencer negates the need to be a proficient keyboard player – simply enter the pitch of each step, press play and enjoy a fast-moving, mechanically precise synth line! In Logic Pro X, you’ll find many ways to explore step sequencing, fusing synthesis and music creation in an exciting and dynamic way. The humble step sequencer has proved itself to be an integral part of the world of electronic music, from the chugging modular Moogs of Tangerine Dream in the 1970s, through to the squelchy TB-303 sequencer lines that are still popular today.
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