PCB Patterns -
Help, Contact & FAQ
Shop - PCB Patterns
(search for shop items within this category)
Raspberry Pi Audio Breakout PCB pattern (PDF download) 
A PDF with the PCB design for the Raspberry Pi Audio board for the Speech Synthesis article from the July 2019 issue (double-sided).
Both layers are in a single PDF.
Cat No SC5094. Price: Free
Raspberry Pi audio PCB (01106191).pdf
Project: Speech Synthesis using a Raspberry Pi Zero
Other items relevant for this project:
Raspberry Pi Audio Breakout PCB 
TDA1543A DAC IC
TDA1543 DAC IC
Raspberry Pi Speech Synthesis software