If existing computers are used, cost can be as low as $250 for headsets only. | Feature | Open Source (This report) | Proprietary (e.g., Sanako, DynEd) | |---------|---------------------------|-----------------------------------| | License Cost | $0 | $8,000–$30,000/year | | Hardware | Standard PCs | Often requires proprietary sound cards | | Lock-in | None | High | | Customization | Full (modify source code) | None | | Offline use | Yes | Often requires cloud connection | | Support | Community + paid optional | Vendor only | | Lifespan | Unlimited | 3–5 years before forced upgrade | 8. Risks and Mitigations | Risk | Mitigation | |------|-------------| | Teacher unfamiliarity with Linux | Use Windows clients (Mumble, Veyon, Audacity all run on Windows) | | Audio latency | Use wired Ethernet, adjust Mumble’s quality to 40ms buffer | | Student distraction | Veyon allows screen blocking and application whitelisting | | No technical support | Contract local Linux consultant ($50–100/hour) or use community forums | 9. Conclusion and Recommendation The open-source language lab is technically superior in flexibility and cost-effectiveness to proprietary alternatives. All required features—audio streaming, recording, screen monitoring, assessment—are available through mature open-source projects (Mumble, Veyon, Moodle, Audacity).