The checksum cannot be confirmed on the Speech LSI Utility screen. It is described at the end of the information file (xxx.inf) generated when Create ROM is performed. The following is an example of the checksum at the end of the information file. In this case, the checksum is "6BF7H".
For RIFF Wave files (* .wav), the bit precision corresponds to 16bit or 8bit. It does not support 24bit. Please refer to "2.3.1. Input Files" of the Speech LSI Utility User's Manual for the readable format.
The memory size of the speech synthesis LSI depends on the playback time, the number of phrases, the sampling frequency, and the playback method. In the speech synthesis LSI on our homepage, there is a page in the user support selection guide that inputs sound data information and calculates the required memory size, so please try it.