Das SSML habe ich ans laufen bekommen.
Bezüglich der Neural Voice werde ich mal ein Feature request auf machen.
Scheinbar muss dort Amazon vom Adapter "nur" ein andere engine vorgegeben werden bei der Anfrage bei AWS.
Choosing the Voice Engine (CLI) To choose a voice engine (CLI) The engine parameter is optional, with two possible values: standard or Neural. Use this property when creating a SynthesisSynthesisTask operation. For example, you can use the following code to run the start-speech-synthesis-task AWS CLI command in the US West-2 (Oregon) region The following AWS CLI example is formatted for Unix, Linux, and macOS. For Windows, replace the backslash (\) Unix continuation character at the end of each line with a caret (^) and use full quotation marks (") around the input text with single quotes (') for interior tags. aws polly start-speech-synthesis-task \ --engine neural --region us-west-2 \ --endpoint-url "https://polly.us-west-1.amazonaws.com/" \ --output-format mp3 \ --output-s3-bucket-name your-bucket-name \ --output-s3-key-prefix optional/prefix/path/file \ --voice-id Joanna \ --text file://text_file.txt
