Complextro Bass Production Guide: Rapid Sound Switching in Serum

What is Complextro?

Complextro is a style of electronic music defined by rapid, rhythmic switching between multiple bass sounds and synth patches. The name combines “complex” and “electro,” and the genre was popularized by artists like Wolfgang Gartner, Porter Robinson (in his early work), and Feed Me. The signature technique involves cutting between different bass timbres on every beat or even every eighth note, creating dense, layered patterns that sound like multiple instruments playing simultaneously.

In Serum, you have all the tools you need to create complextro bass sounds and arrange them into the rapid-fire patterns that define the genre. The key is not just sound design but also how you organize and switch between your sounds in your DAW.

This guide covers both the sound design and arrangement techniques you need to create authentic complextro bass patterns.

Designing Your Sound Palette

Building Multiple Bass Timbres

Complextro requires a palette of 4-8 distinct bass sounds that complement each other while sounding different enough to create contrast when switching between them. Each sound should have a clear identity. Think of it as assembling a team where every player has a unique role.

Start by creating these essential bass types in Serum. First, a clean, punchy mid bass using a saw wave with a tight filter envelope. Second, a growling, modulated bass with LFO-driven filter movement. Third, a metallic, FM-based sound with sharp harmonics. Fourth, a square wave or pulse bass with a retro, 8-bit flavour. These four sounds give you enough variety for most complextro patterns.

Ensuring Sonic Cohesion

While each sound should be distinct, they also need to work together as a unit. Use the same sub bass layer across all your patches (or a separate sub bass track) so the low end remains consistent regardless of which mid-range patch is playing. Process all your mid-range bass sounds through similar effect chains (similar compression settings, similar EQ curves) to give them a unified character.

Test your sounds by playing them in sequence quickly. If any sound sticks out as too loud, too bright, or too different, adjust it until the transitions feel smooth. The goal is distinct timbres at a consistent level and tonal balance.

The Rapid Switching Technique

Method 1: Multiple Tracks

The most straightforward approach is using separate tracks for each bass sound. Create 4-8 tracks in your DAW, each with a different Serum patch. Program your bass pattern by distributing notes across the different tracks. Note A plays on Track 1, Note B on Track 2, Note C on Track 3, and so on. This gives you complete independent control over each sound.

The advantage of this method is flexibility. You can process each sound independently and adjust levels easily. The disadvantage is managing multiple tracks and ensuring the transitions between sounds are seamless.

Method 2: Automation Within One Patch

A more advanced approach uses a single Serum patch with macro controls that dramatically change the sound character. Set up your macros so that different positions create completely different timbres. Automate the macros rapidly to switch between these states in time with your bass pattern.

For example, Macro 1 could control wavetable position and filter type simultaneously. At position 0, you get a saw-based sound with a low-pass filter. At position 127, you get an FM-based sound with a band-pass filter. Automating this macro on every beat creates the rapid switching effect from a single plugin instance.

Method 3: Chopping Audio

Record each bass sound as audio, then chop and arrange the audio clips to create your pattern. This is the most hands-on approach but gives you the most precise control over timing and transitions. You can crossfade between clips, apply effects to individual chops, and create patterns that would be impossible with MIDI alone.

Many complextro producers use a combination of all three methods, choosing the best approach for each section of their track.

Programming Complextro Patterns

Rhythmic Frameworks

Complextro patterns typically follow a strong rhythmic framework. The most common tempo is 128 BPM (electro house tempo), though some complextro works at other tempos. Start with a simple rhythmic pattern, eighth notes or sixteenth notes following the kick drum pattern, and assign different bass sounds to different beats.

A classic complextro pattern might use Sound A on beats 1 and 3, Sound B on the “and” of beats 1 and 3, Sound C on beat 2, and Sound D on beat 4. This creates a four-sound rotation that repeats every bar. Vary the pattern every 4-8 bars to keep things interesting.

Adding Complexity Gradually

Do not start with maximum complexity. Build your pattern over the course of your drop. Start the first 8 bars with 2-3 sounds switching on every beat. By bar 16, increase to 4-5 sounds switching on eighth notes. By bar 24, go full complexity with rapid switching, fills, and variations. This progression keeps the energy building and gives the listener time to process the increasing density.

Mixing Complextro Bass

Mixing rapid bass switching presents unique challenges. Level matching between different bass sounds is critical. If one sound is louder than the others, it disrupts the flow. Use gain staging and compression to ensure consistent levels across all your bass patches.

Group all your mid-range bass tracks to a single bus and apply glue compression. This helps the different sounds sit together as a cohesive unit rather than a collection of separate patches. Add a subtle multiband compressor on the bus for frequency-consistent dynamics control.

For ready-to-use bass sounds that are designed to work together, browse the Preset Drive shop. Our Serum preset packs include multiple bass timbres within each collection, making it easy to build complextro palettes quickly.

Try our Free Serum Taster Pack to start building your bass sound palette today.

Create bass patterns that blow minds. The Preset Drive shop has the bass presets you need for complextro and beyond. Multiple timbres, one download, instant creativity.