If I can be of any help, let me know.
Working on a message system playback only for Repeater Controller.

Using a 16F877-04I/P MCU with a ISD17240PY Voice Chip via SPI interface in
Master Mode. May have to change my mind as of tonight reviewing a DESIGN GUIDE for the ISD1700 Series saying I should use the SLAVE MODE.

Any Comments or Suggestions for those who have worked with the 1700 Series Voice chips?

This is quite a bit of setups to perform prior to initiate READ, WRITE, PLAY, RECORD, STOP, etc commands. The document I am talking about is easily found by Google Searching "ISD1700 Design Guide".

Like to work with another Amateur Radio Operator on this project.

Dennis, N5VRP
Texas