#20 espeak engine was unable speak a text in a sample C/C++ application
I am working as a software developer in Diebold Nixdorf Inc. One of our customer is interested Espeak engine version 1.48.04 (latest version on windows). Hence, I am doing a POC to support our customer with Espeak engine version 1.48.04 running on windows. I have written one sample applications in C++ with loading Espeak DLL (espeak_sapi.dll). ). I am passing as a text message and need to speak through this engine. So, as a process of speaking, I am calling Espeak APIs like espeak_Initialize(), espeak_Synth(), espeak_SetSynthCallback() and espeak_Synchronize() as sequence of calls . All calls are successful, still not able to speak though same logic of codes I have reused like Write4Bytes(), OpenWavFile() and CloseWavFile(). The requirement is NOT to use command line exe of espeak engine. I have attached the application file (eSpeak.cpp) for your reference. I am struggling to find out the exact root cause of the issue. So, requesting your suggestion to find out the root cause of the issue.
Looks like something is missing though I am not very sure whether espeak engine works reading text message through standalone application. I have seen command line exe works for English text and speaks the text. Hence, raised this request to seek assistance/suggestion.
Last edit: JYOTIPRAKASH CHINARA 2025-06-20