Mastodawn

Eloquence 64-bit for NVDA now supports a 44 kHz mode. It’s currently in preview and still being fine-tuned.
You can use the Sample Rate combo box in the Voices dialog to increase the default rate from 11 kHz to 44 kHz for clearer speech.
Unlike the 22 kHz mode in IBMTTS and ViaVoice, this mode doesn’t introduce pops, jitters, or unexpected voice resets.
Try the 16.1 upsampling preview release:
https://github.com/hozosch/eloquence_64/releases/tag/upsampling_preview
For more on the upsampling preview and author discussions check here:
https://github.com/fastfinge/eloquence_64/issues/88#issuecomment-4091293709

Release v16.1 upsampling preview · hozosch/eloquence_64

This version introduces the possibility to change the sample rate between 8, 11, and 44 KHz. 44 KHz is achieved by upsampling the 11 KHz signal externally via a CDLL. This is marked as preview unti...

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x0 Mar 21

@amir The hell? Why? How? Doesn't that just do the exact same resampling pass that the mixer system does before it hits the audio device?

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Amir Mar 21

@x0 I don't know the trick behind it as my war-affected internet doesn't allow more analysis. But it sounds great and offers much clearer speech quality compared with 11 kHZ.

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x0 Mar 21

@amir Do you know if the add-on supports 2025.x NVDA at all and/or can coexist with IBMTTS?

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Amir

@x0 Hmm. As far as I know, it doesn't support 2025.x NVDA releases. And IBMTTS and Eloquence have never been able to coexist unless one is disabled. But Eloquence 64-bit now offers all text-processing fixes and crash-proof strings once only provided by IBMTTS, and it also offers the required libraries as well as direct access to the community dictionaries.