PAPERBIRD 纸鸢 & Birdance - ear modular

 

Paperbird – Multi-Function Logic & Shaping Tool (10HP)

 

Paperbird is a versatile utility module built around two square-wave generators that cross-modulate to unlock a wide range of functions. Each function can also process external signals by patching into the corresponding jacks, replacing the internal square waves.

 

Core Controls

 

 

• A / B Knobs: Adjust the rate of the two internal square waves

• A / B CV Inputs: Modulate the square wave rates with external CV

 

 

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Functions (Top to Bottom)

 

 

1. Logic

 

 

• Internal square waves A & B are normalled to inputs A and B

• Patch into A or B to replace internal signals with external audio/CV

• OR Output: Logical OR of the two inputs

• AND Output: Logical AND of the two inputs

• Bonus: Feeding audio signals converts them into square waves at the outputs

 

 

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2. Shifting Register

 

 

• Two independent shift register sections:

   

  • Top: A = Clock, B = Data

  • Bottom: A = Data, B = Clock

   

• External signals can replace A/B

• Outputs per section:

   

  • DC1 / DC2: Stepped voltages via R-2R DAC

  • AC1 / AC2: Smoothed versions of DC outputs for flowing modulation

   

 

 

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3. VCA + Wavefolder

 

 

• AC1 / AC2 feed into signal inputs

• A / B feed into control inputs

• Patch external signals for either input

• Behavior:

   

  • Low control signal → acts as VCA

  • Higher control → signal folds beyond threshold

  • Adjust controls for pure VCA, pure wavefolder, or hybrid shaping

   

 

 

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4. Mixer

 

 

• Three-channel mixer with:

   

  • MIX & MIX MULT: Mixed signal

  • -MIX: Inverted mix

   

• Fully independent; no internal routing

 

 

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Rear Panel Trim Pots

 

 

• 2 × Smoothing for AC outputs

• 2 × Fold thresholds for wavefolders

 

 

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Birdance – 4HP Expander

 

Connect via the rear header for extended features:

 

• A / B Individual Outputs (raw square waves)

• Extra CV inputs for the two VCAs (normalled to +6V with attenuators)

• Offset Generator: Adjustable -6V to +6V CV source

 

 

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📌 Perfect For: Logic processing, rhythmic modulation, complex CV generation, wave shaping, and mixing—all in one compact tool.