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niedev / RTranslator

Open source real-time translation app for Android that runs locally
Apache License 2.0
6.85k stars 518 forks source link

[Feature request] Suggest eSpeak and RHVoice as open-source TTS engines #93

Open lrq3000 opened 2 days ago

lrq3000 commented 2 days ago

For the phones where there is no or limited TTS engines (eg, phones without the Google Mobile Services GMS), a great alternative is espeak (https://github.com/espeak-ng/espeak-ng and https://f-droid.org/fr/packages/com.reecedunn.espeak/), which allows to have multilanguage TTS with very small packages, totally offline and open-source. Almost all languages supported by RTranslator are also supported by espeak, including low quality data languages, so it looks like a match made in heaven (and I tried personally, it works).

For those wanting higher quality mor natural sounding TTS, there is RHVoice, but it supports only a very limited number of supported languages for now: https://github.com/RHVoice/RHVoice

I suggest that RTranslator can mention and link to these projects, so that users who don't have an adequate multilingual TTS on their phone can try them.

niedev commented 6 hours ago

Hi, thank you for the suggestion, in the next weeks I will test these TTS engines and if they have good quality, sure, I will mention those in the readme

lrq3000 commented 2 hours ago

RHVoice is awesome out of the box.

ESpeak is lower quality but it's there since a longer time so it has more languages covered and is using a tech with small languages files so it's easy to support tons of languages on a phone.

If you try eSpeak, i found that slowing down the speech speed was necessary, after it does not sound as natural as modern online tts models but it's largely intelligible.

lrq3000 commented 2 hours ago

Actually, here is a demo I just recorded on my phone so you can hear for yourself: https://www.youtube.com/shorts/VJgbFbQtBSI