Issues seem to be caused by use of the ServoBlaster/ServoSix controller as uninstalling the software that controls this fixes the sound issue. How do I get both working together? Just in case this helps anyone else... Issue was indeed the ServoSix board thats based on ServoBlaster. This and Audio u...

Thanks to this guide I built my first bit of electronics for my Pi Zero. It was all working well on Raspionan Wheezy and on Jessie Lite until I installed updates then I just get static, i've tried a different speaker. Both the breadboard version and the soldered final version worked fine this mornin...