@@claude-sonnet-4 a diagram of an electroacoustic setup tha…

I found several excellent resources showing diagrams and setups for electroacoustic feedback systems that generate audio without traditional instruments or microphones! Here are the key findings:

## **Campbell Foster's Electroacoustic Feedback Synthesis Research**

The most comprehensive resource is Campbell Foster's detailed academic paper on **"Electroacoustic and Computational Feedback Synthesis"** which includes multiple diagrams:

### **Key Diagrams Available:**

1. **Standard Control Theory Feedback Loop** - Shows the basic feedback system structure
2. **Electroacoustic Sheet Metal Feedback Phone System** - Complete circuit diagram for a physical feedback instrument
3. **Computational Feedback Synthesis System** - Software-based feedback loop diagram

### **The Physical Setup:**
- Uses a **metal plate** (0.62 x 0.91 m) as the resonant medium
- Two **electroacoustic transducers** (4-inch speakers) mounted on the plate:
- One as "**plate nozzle**" (output/actuator)
- One as "**plate collector**" (input/pickup)
- **Automatic Gain Control (AGC)** - crucial component for sustaining feedback
- **Variable resistor** for real-time loop gain control
- **External amplifier and speaker** for monitoring

### **How It Works:**
1. The feedback loop creates **self-resonating vibrations** through the metal plate
2. **No external audio input needed** - the system generates its own sound through controlled feedback
3. The performer can manipulate the sound by:
- Adjusting loop gain
- Physically bending/touching the metal plate
- Controlling the AGC settings

## **YouTube Tutorial: "Authentic Feedback Loop for Sound Design"**

There's also a practical video tutorial by **Jarf** showing how to create an **internal feedback loop using just an audio interface** - no guitar amp or microphone needed.

## **Self-Resonating Vibrotactile Instruments (SRIs)**

The academic paper on SRIs provides additional diagrams showing various **feedback instrument configurations** including:
- String-based feedback systems
- Air column feedback instruments
- Surface/membrane feedback setups
- Assemblage-type feedback instruments

These systems all share the principle of **electro-mechanical feedback loops** that create **self-resonance** as the primary sound production method, allowing for rich audio generation without traditional input sources.

Would you like me to provide more specific details about any of these setups or help you understand the technical implementation of these feedback systems?

@@claude-sonnet-4 consolidate the answer in a single post

# **Electroacoustic Feedback Setup Diagrams**

I found excellent resources showing diagrams for electroacoustic feedback systems that generate controlled audio without traditional instruments or microphones!

## **Campbell Foster's Electroacoustic Feedback Synthesis**

The most comprehensive resource is **Campbell Foster's academic paper** on "Electroacoustic and Computational Feedback Synthesis" which includes detailed diagrams and complete system specifications:

### **Key System Components:**
- **Metal plate** (0.62 x 0.91 m) as the resonant medium
- **Two 4-inch speakers** mounted on the plate:
- One as "**plate nozzle**" (output/actuator)
- One as "**plate collector**" (input/pickup)
- **Automatic Gain Control (AGC)** - crucial for sustaining feedback
- **Variable resistor** for real-time loop gain control
- **External amplifier and speaker** for monitoring

### **How It Works:**
1. The feedback loop creates **self-resonating vibrations** through the metal plate
2. **No external audio input needed** - the system generates its own sound through controlled feedback
3. The performer manipulates sound by:
- Adjusting loop gain with the potentiometer
- Physically bending/touching the metal plate
- Controlling AGC settings

### **Available Diagrams:**
- **Standard Control Theory Feedback Loop** - basic feedback system structure
- **Electroacoustic Sheet Metal Feedback Phone System** - complete circuit diagram
- **Computational Feedback Synthesis System** - software-based version

## **Additional Resources:**
- **YouTube tutorial** by Jarf showing "Authentic Feedback Loop for Sound Design" using just an audio interface
- **Self-Resonating Vibrotactile Instruments (SRIs)** research with various feedback instrument configurations
- **ResearchGate diagrams** showing experimental feedback control setups

These systems all use **electro-mechanical feedback loops** that create **self-resonance** as the primary sound production method, allowing rich audio generation without traditional input sources. The key is the **AGC component** that sustains low-level signals traveling through the resonant medium, preventing the system from taking the "path of least resistance" (direct speaker-to-speaker feedback) and forcing it through the intended resonant body.

Would you like me to elaborate on any specific aspect of these feedback systems?