[Tts-project] Bug#935489: Bug#935489: festival: server mode does not respect voice_default

[ghost]

Hello,

On 2019-08-26, Samuel Thibault wrote：
> - run echo hello | festival --tts, got slt_arctic_hts
> - run festival --server on the side
> - run spd-say -o festival hello, got arctic_kal_diphone

emm, wouldn't this also be an issue when the server mode
gives a different result even with the same configuration?

Regards