Do you provide an API? If yes, you should add this information to your website. What are the max and min durations that you support? Do you charge per second/minute?

Here are a couple of libraries that aim for the same goal (single-table DynamoDB usage):

- https://github.com/jeremydaly/dynamodb-toolbox

- https://github.com/jeffreyyoung/single-table-dynamo

- https://github.com/JasonCraftsCode/dynamodb-datamodel

- https://github.com/ginger-io/beyonce

I would be interested in a comparison.

The audio files from LibriVox are commonly used to train neural networks for ASR and TTS, see e.g. https://www.danielpovey.com/files/2015_icassp_librispeech.pd... and https://arxiv.org/abs/1904.02882