FeenPhone is a free app for radio and podcasters with ultra-high-quality full-duplex decentralized talk.FeenPhone has an extensive list of features that are impressive. Some of these features include: P2P HQ mono true-duplex audio direct from one computer to another via Opus codec.check3 No noise reduction or echo cancellation, by choice. check3 Solid networking built from the ground up. check3 Extensible for other protocols.check3 Drop-down menus to pick audio input, audio output, buffer settings and codec settings.check3 Text chat for troubleshooting.check3 Saves settings (including remote IP) on exit.check3 Buffer meter check3 Low-latencycheck3 No creep in latency. check3 Roll separate server module into program.check3 Multi-protocol support (TCP, UDP, Telnet)check3 Master volume VU metercheck3 Additional audio format / codec: PCM, G.722. (were later removed from interface, didn't sound as good as Opus) check3 Minimal clicking and drop-outs. check3 Doesn't crash.check3 Works almost flawlessly for two hours of solid two-way talk. check3 Ability to add a third person to the conversation. check3 More variations in Opus settings. check3 Default to best buffer settings on all three sliders.check3 Input VU meter for each hostcheck3 Volume sliderscheck3 Much more and more to come.