Real-Time Voice Alteration in Flutter WebRTC
Budget: $30 – $250 USD
## Project: Flutter WebRTC Real-Time Natural Voice Alteration for Android
### Project Goal
I need a developer to select any suitable open-source Flutter WebRTC demo project and modify it to demonstrate real-time sender-side voice alteration.
My ultimate goal is to get the modified source code of that open-source Flutter WebRTC project, where the sender’s natural human voice can be altered into another natural-sounding human voice during a WebRTC call.
The developer should mainly focus on the **audio alteration part**.
Expected flow:
Natural Sender Voice → Real-Time Voice Alteration → Different Natural Human Voice → WebRTC Transmission
---
## Source Code Requirement
I will not provide my original application source code.
The developer may choose any suitable open-source Flutter WebRTC demo project as the base project.
The final delivery should include the modified version of that selected open-source project.
---
## Architecture Requirement
The audio alteration should happen on the **sender side before transmission through WebRTC**.
Expected technical flow:
Microphone → Audio Alteration → WebRTC Encoder → Send Stream
Receiver-side processing is not required.
---
## Audio Quality Requirement
The altered voice must:
* Sound like a different natural human speaker
* Remain understandable
* Not sound robotic, artificial, broken, or heavily distorted
* Work in real time during a WebRTC call
* Keep latency acceptable for live conversation
---
## Development Requirement
The developer may use any practical approach, including open-source libraries, DSP methods, ML/AI-based methods, or other suitable techniques.
AI-assisted development tools may be used if helpful.
Final code quality, testing, and debugging remain the developer’s responsibility.
---
## Testing Requirement
Testing must be completed at least locally before delivery.
The developer must verify that:
* The app builds successfully
* The app runs on Android
* WebRTC communication works
* Sender-side audio alteration works
* The receiver hears the altered voice
* The altered voice sounds natural enough for real-time conversation
---
## Deliverables
1. Modified Flutter WebRTC source code
2. Android APK file
3. Test procedure document explaining:
* How to install the APK
* How to run the selected WebRTC demo
* How to enable/disable voice alteration
* How to verify that the receiver hears the altered voice
* How local testing was performed
4. Short technical note explaining:
* Which open-source project was selected
* Where the audio alteration code was added
* Any libraries or components used
* Any known limitations
---
## Acceptance Criteria
The project will be accepted only if:
1. Modified source code is provided
2. APK installs and runs on Android
3. WebRTC communication works
4. Sender-side voice alteration works during the call
5. Receiver hears the altered voice
6. Altered voice sounds like a natural human voice, not robotic
7. Developer confirms local testing was completed
8. Source code can be rebuilt successfully
### Project Goal
I need a developer to select any suitable open-source Flutter WebRTC demo project and modify it to demonstrate real-time sender-side voice alteration.
My ultimate goal is to get the modified source code of that open-source Flutter WebRTC project, where the sender’s natural human voice can be altered into another natural-sounding human voice during a WebRTC call.
The developer should mainly focus on the **audio alteration part**.
Expected flow:
Natural Sender Voice → Real-Time Voice Alteration → Different Natural Human Voice → WebRTC Transmission
---
## Source Code Requirement
I will not provide my original application source code.
The developer may choose any suitable open-source Flutter WebRTC demo project as the base project.
The final delivery should include the modified version of that selected open-source project.
---
## Architecture Requirement
The audio alteration should happen on the **sender side before transmission through WebRTC**.
Expected technical flow:
Microphone → Audio Alteration → WebRTC Encoder → Send Stream
Receiver-side processing is not required.
---
## Audio Quality Requirement
The altered voice must:
* Sound like a different natural human speaker
* Remain understandable
* Not sound robotic, artificial, broken, or heavily distorted
* Work in real time during a WebRTC call
* Keep latency acceptable for live conversation
---
## Development Requirement
The developer may use any practical approach, including open-source libraries, DSP methods, ML/AI-based methods, or other suitable techniques.
AI-assisted development tools may be used if helpful.
Final code quality, testing, and debugging remain the developer’s responsibility.
---
## Testing Requirement
Testing must be completed at least locally before delivery.
The developer must verify that:
* The app builds successfully
* The app runs on Android
* WebRTC communication works
* Sender-side audio alteration works
* The receiver hears the altered voice
* The altered voice sounds natural enough for real-time conversation
---
## Deliverables
1. Modified Flutter WebRTC source code
2. Android APK file
3. Test procedure document explaining:
* How to install the APK
* How to run the selected WebRTC demo
* How to enable/disable voice alteration
* How to verify that the receiver hears the altered voice
* How local testing was performed
4. Short technical note explaining:
* Which open-source project was selected
* Where the audio alteration code was added
* Any libraries or components used
* Any known limitations
---
## Acceptance Criteria
The project will be accepted only if:
1. Modified source code is provided
2. APK installs and runs on Android
3. WebRTC communication works
4. Sender-side voice alteration works during the call
5. Receiver hears the altered voice
6. Altered voice sounds like a natural human voice, not robotic
7. Developer confirms local testing was completed
8. Source code can be rebuilt successfully