The user should be able to preview the transcription (listen to the resulting speech) before saving an edit. This will be done by sending the transcription to Speechoid to be synthesized.
This could probably be done as a PHP request, which would reload the page with the preview element added. Alternatively, this can be done with AJAX in the frontend. The advantage with the latter is that it user experience will not be interrupted by the page reloading. This may be significant when fine tuning transcriptions. The downside is that it does not allow previewing if Javascript is disabled. Ideally, we would have an Javascript implementation with PHP fallback, but we should start with one of them.