TalKT is a very simple application which allows voice QSO over packet. It uses a very simple but flexible protocol called VoAX to transfer data. The codec is not part of TalKT itself, so it can be changed if you want. VoAX can handle different formats, in fact it could be used to transfer other data then compressed speech, e.g. images. The current version is designed to use MELP which is used by FlexTalk, too. Since I am unsure about the licensing of MELP, please download it at your own risk. I one of the next releases I will include support for LPC10, which I know to be publicly available. LPC10s quality is significantly worse than MELP, though. Both need about 2k4 throughput for realtime, so you should have at least 9k6. TalKT doesn't do realtime at the moment, but this is planned (VoAX can handle it). TalKT depends on Sox for audio recording/output, it should be part of your distribution.