Is the navigation voice packet recorded manually or synthesized?

Navigation sounds are usually AI synthetic sounds, but they are all customized later on the basis of having a huge sound source. In addition to the standard AI dubbing of the initial navigation sound, the voice packages of Lin Chi-ling and Degang Guo are all made after recording hundreds of lines on the spot, based on sufficient data, because although fixed sentences can be recorded, there are too many details such as "East Street". If recording is too heavy, it is better to dub it with AI. Therefore, many navigation voice packets are generally produced by AI synthetic dubbing.

For more dubbing information, please pay attention to voice dubbing:/