Wenzellabs — NSA Selector

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NSA Selector Eurorack Module Manual (PDF)

Using the NSA Selector to Structure Full-Length Eurorack Songs

As a eurorack modular musician, it’s easy to get stuck in the loop zone—great beats or textures, but no real movement or "song" development. The NSA Selector module is different: it’s a network-to-audio module that converts raw Ethernet traffic ("any bit on the network will be sent to the audio output") into audio signals, introducing a whole new way to bring variety, structure, and unpredictability to your music.

Below, I'll break down creative strategies for using the NSA Selector as a core "arrangement instrument" in a modular setup, helping you move beyond loops and into full-length song territory.

How the NSA Selector Works (Recap)

• Two Ethernet jacks, one audio output
• Network packet bits are literally "audified" to the output
• Not a standard audio interface or network protocol player—just raw bit-to-audio tapping
• 4 bit, 25MS/s native format from the PHY MAC MII interface; "network noise" becomes audio
• Add computer-generated or real network traffic to shape the sounds

Strategies for Full-Length Song Creation

1. Section Changes via Network Traffic Modulation

How: - Use your computer, Raspberry Pi, or another network-capable device to send different types of traffic patterns at different times—like bursts, lulls, pings, file transfers, image transfers, or deliberate "quiet" periods. - Automate these traffic types using scripts, or MIDI-controllable software (integrate with ping scripts, netcat, socat, etc). - Use the NSA Selector's audio output as a key source for percussion, noise beds, or glitchy leads that change character over time based on the incoming network patterns.

Song Structure Use: - Verses: Lightweight ping traffic for sparse noise, low rhythm - Chorus: Dump a bitmap image for intense, noisy bursts - Bridge: Network quiet or only small packets for minimal sections - Drop: Flood with HTTP or FTP or gaming traffic for maximum chaos

2. Automated Evolutions With Scripts

How: - The included sequencer/ shell scripts can "play" sequenced network patterns, e.g., network ping bursts of various sizes. - Combine with external sequencers that trigger scripts via MIDI-over-USB or network. - Build up sections that increase or decrease in complexity by controlling the density, duration, and periodicity of network traffic.

Song Structure Use: - Intro: Low-density, simple traffic evolving into more complex patterns - Buildup: Gradually automate scripts to ramp up the network "sequencer" - Drop: All scripts firing, high-traffic bursts - Breakdowns: Back down to minimal scripts, single bursts

3. Layered Sampling and Resampling

How: - Record the NSA Selector’s output during various network traffic states. - Resample or layer these as loops in a sampler module (e.g., Morphagene, Bitbox, Nebulae). - Use previously recorded "network jams" as evolving backgrounds, contrasts, or transitions throughout your structure.

Song Structure Use: - Use sampled network audio for intro/outro beds, transitions between song sections, or to create evolving motif elements that reappear across the song ("theme and variation").

4. Glitchy Breaks, Fills, and FX

How: - Use external manipulation (like running tcpdump, flooding traffic, or dropping network interfaces) as a live performance technique to introduce breakdowns, rhythm changes, or sudden noise cuts. - Automate this with CV-controlled network switches or relays for precise song timing.

Song Structure Use: - Dramatic drops or fills - Glitch transitions (sudden silence or cacophony, steering the energy flow) - FX overdubs or one-off noises that mark section changes (like new verse/chorus/break)

5. Interactive or Generative Song Structures

How: - Set up automated or interactive network processes: e.g., control network devices via MIDI, touch interface, or generative code (Max/MSP, Pure Data, Tidalcycles, Supercollider, etc). - Song evolves based on real-time or "randomized" network interactions.

Song Structure Use: - Self-generating textures that evolve across a full piece - Use physical network device actions (plug/unplug, Wi-Fi device activity) mapped to key structural moments

6. Sync and Layer With Traditional Eurorack Modules

How: - Layer the NSA Selector output with analog drums, bass, and synths: route its audio through VCAs, filters, effects, and envelopes to keep it musical and dynamic. - Use envelope followers or comparators to extract triggers or gates from its noisy output, clocking sequencers or modulating other voices for cross-networked modulation over your groove. - Gate effects, VCAs, or sample switches ("song parts") by voltage derived from the Selector’s output—using the noise bursts to flip sections, mutes, or effects.

Example Patch for Full Song Structure

[Network Source(s)] 
     |
     v
[NST Selector Module] --[VCA]--> [Filter/FX] --> [Mixer/Output]
     |                                ^
     |                                |
[Envelope Follower/Comparator] -------|
     |
[Clock/Gate Out] --------> [Sequencer/Drum Machine/FX Trigger]

• Pre-program or improvise network scripts for evolving layers over song sections
• Use envelope follower to trigger new drum/bass synth patterns or effects
• Change network traffic types for unique "chorus," "verse," or "bridge" textures

Tips for Creating Complete Songs

• Plan your network arrangements like any musical score—time your traffic patterns for distinct sections.
• Blend with traditional voices: NSA Selector shines as a textural/arrangement layer; use it to break loops and introduce surprise and movement.
• Automate, sample, and resample for further flexibility—network sounds can become motifs!
• Use live performance of network changes (muting ports, traffic bursts) for expressive control over your song’s structure.

Generated With Eurorack Processor