SAPI5 is less responsive

[burmancomp]

Steps to reproduce:

Issue occured with Finnish mikropuhe, maybe with other SAPI5 tts as well.

Ensure WASAPI is enabled. Then move from window to window or from control to control.

Actual behavior:

It takes more time to interrupt speech with control key or get new content (if you for example have moved to list, and nvda start to speak current item and you then press arrow key to move next item) to be spoken.

Expected behavior:

Same as before - no extra delay to interrupt speech or to start to speak new content. Disabling WASAPI would seem to resolve this.

NVDA logs, crash dumps and other attachments:

System configuration

NVDA installed/portable/running from source:

installed

NVDA version:

alpha-51845,8dffe620 (2025.3.0.51845)

Windows version:

w11 24h2

Name and version of other software in use when reproducing the issue:

Other information about your system:

Other questions

Does the issue still occur after restarting your computer?

yes.

Have you tried any other versions of NVDA? If so, please report their behaviors.

If NVDA add-ons are disabled, is your problem still occurring?

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?

yes.

[gexgd0419]

Please check this snapshot build from #18675.

[burmancomp]

Thanks! No doubt this is better. I trust your opinion on whether this will completely fix the problem.

[gexgd0419]

I think this may be a duplicate of #18674.

[seanbudd]

@burmancomp - have you tested enough with the build to confirm it fixes this issue?

[burmancomp]

I have not performed additional tests. If @gexgd0419 can reproduce this issue I rely his opinion to consider on whether this is completely fixed.