My latest (and best) physical modeling piano patch built in a modular VST

Introduction

This tutorial will guide you through the process of creating a physical modeling piano patch using a modular VST, inspired by the techniques presented in the video by 9b0. The patch utilizes a Karplus-Strong synthesis approach, employing various filters and resonators to achieve a realistic piano sound. Follow these steps to replicate or modify the piano patch for your own music production needs.

Step 1: Set Up the Hammer Mechanism

To create the initial sound of the piano, you will need to design the hammer mechanism.

• Use four SVFs (State Variable Filters):
  • Set these filters to bandpass mode.
  • Adjust the resonance to decay quickly.
  • Tune each filter to the harmonic frequencies of the note you want to play.

Step 2: Generate Inharmonic Frequencies

Inharmonic frequencies add depth to the sound, especially for lower notes.

• Create a Nested Allpass Filter Structure:

  • Implement three 1st-order allpass filters nested within each other.
  • This creates a complex frequency response essential for inharmonic sound.

• Use a High-Pass Filtered Feedback Comb Loop:

  • Connect the output of the nested allpass filters to a comb filter.
  • This setup enhances the inharmonic characteristics of lower notes.

Step 3: Build the Main Resonators

The main resonators are critical for shaping the overall timbre of the patch.

• Utilize Three Comb Filters:

  • Each comb filter should have two 2nd-order allpass filters inside.
  • This configuration helps to detune the harmonics, adding a metallic quality to the sound.

• Implement Detuning Techniques:

  • The allpasses should be designed to detune the comb filters in unison.
  • This will create a flanging effect that enriches the sound.

Step 4: Create the Double Envelope Effect

To mimic the behavior of a piano, you will need to set up a feedback loop.

• Establish a Negative Feedback Loop:
  • Connect the inharmonic frequencies and resonators with a small feedback coefficient.
  • This setup will generate a double envelope, characteristic of piano sounds.

Step 5: Simulate the Piano Body

The body of the piano sound can be simulated using reverb.

• Add a Small Reverb Effect:
  • Choose a reverb plugin that allows for subtle adjustments.
  • Set a low mix level to simulate the resonance of a piano body without overwhelming the sound.

Conclusion

In this tutorial, you've learned how to create a physical modeling piano patch using modular VST techniques. By setting up the hammer mechanism, generating inharmonic frequencies, building resonators, creating a double envelope effect, and simulating the piano body, you can achieve a rich and realistic piano sound.

Next Steps

• Experiment with different filter settings and feedback levels to customize your sound.
• Join the 9b0 Discord community for further discussions and tips on sound design.
• Explore other modules within Alpha Forever Modular to expand your sound palette.