The original Msty (1.9.2, not the flaky new Studio version) is a fine free desktop host for running local offline LLMs (‘AIs’). But it has no offline text-to-speech. Your AIs can’t talk, unless you get an API key and are always online.
One offline solution is the freeware Simple TTS Reader 2.0, which reads whatever gets sent to the Windows clipboard. Very very simple, it just does the job — anything copied to the clipboard gets read aloud. Great, but sadly it can only use Microsoft Speech voices, which are rather robotic and limited. It appears Microsoft has moved on from these, to its new and far better Azure TTS voices.
However, there’s a hack to get these Azure voices locally. There’s a handy NaturalVoiceSAPIAdapter from GitHub, with a straightforward Windows installer. This freeware makes Microsoft’s Azure natural (aka ‘neural’) TTS voices accessible locally to any SAPI5 compatible TTS desktop software. On Windows 11, these more advanced voices are otherwise locked to the Windows Narrator for local use, and no other software can use them (booo…). But now Simple TTS Reader can use them too.
As well as NaturalVoiceSAPIAdapter also get your target Azure voice from this selection of free voice downloads. Unzip it as directed and put it somewhere sensible. When you install NaturalVoiceSAPIAdapter, you need to tell the software where the voice is on your PC.
After that, restart Simple TTS Reader 2.0 and you have a good local Azure TTS voice for automatically reading whatever is sent to the clipboard. Now when you hit ‘Copy to Clipboard’ at the end of a Msty LLM response, the text will be read in a reasonably good AI voice.
Regrettably Msty can’t automatically ‘Copy to Clipboard’ at the end of each LLM response. It has to be done manually, by clicking the icon. Ideally, Msty would add a “copy each new sentence to the clipboard, on completion” option.
Having Azure voices locally on your PC may also interest animators who’d like to have such quality voices without going online. Of course, there are also dedicated TTS AIs now… but they can be very fiddly to set up, require many Gbs of downloads and disk space, and also a good graphics card to run them. The above fast Windows 11 solution requires a mere 80Mb in total and no graphics card.







