Hi,
I bought the Pirate Radio Kit a few days ago,
did everything as posted in the tutorial and had the same issues.
The scratchy sound could easily be changed to great sound.
Just edit vlcd in /usr/bin:
sudo nano /usr/bin/vlcd
and change: --compressor-makeup-gain 12.0
to: --compressor-makeup-gain 0
this compressor should just be used as a limiter and needs no makeup gain…
I thought about sending it back to Pimoroni but now I’m impressed by the sound.
Greetz, CSX