Good job, team Lyrebird. My feedback is that while the inclusion of ethics page is great, it could do with more content on your vision and what you will not let your tech be used for. I know others can develop similar tech, but it will be good to read about YOUR ethics.
[Edited for clarity]
Judging by the samples from the homepage there are audible artifacts in the recordings resulting from synthesis. I doubt these would pass scrutiny if presented as evidence in court. In some ways forging a voice is like forging a signature, truth can be exposed with enough effort.
Not just that, but ethical expectations on the users, backed up by legal policy, would seem important for this.