Syntherceptor

• Latest version: 2026.1.26.13,4fe663ef, Mon Jan 26 11:48:32 2026
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• Author: James Teh <jamie@jantrid.net>
• Copyright: 2025 James Teh
• License: GNU General Public License version 2.0

Syntherceptor is a SAPI5 synthesiser which speaks using NVDA. This is useful for apps like Komplete Kontrol, Surge, etc. which use SAPI5 but you'd prefer the speech output to happen using your NVDA synthesiser and settings. This also prevents different voices from speaking at the same time, allows you to interrupt speech with a key press, etc.

Download and Installation

Download the latest installer using the link at the top of this page. Then, run the installer and follow the instructions.

Building

Dependencies

1. Install Build Tools for Visual Studio 2022 .
2. Install Python and SCons.
3. Download NVDA Controller Client. Extract it into deps/nvdaControllerClient inside the Syntherceptor checkout directory.

How to Build

From a command prompt, change to the Syntherceptor checkout directory and run scons. The resulting installer can be found as build/syntherceptor_unknown.exe.