I have Raspbian as my OS. I am connected to a Samsung 32" LCD TV via an HDMI.
I have successfully modified config.txt to set up the display as 720p and made the necessary changes to force audio output to HDMI (hdmi_drive=2).
After manually typing the line to set the mixer output to HDMI
sudo amixer cset numid=3 2
If I select the Front_Center file to be output, there is a clicking followed by part of word, this is more apparent if I select Noise.wav, there is a period of clicks followed by 'white' noise.
If I change the audio output destination to be the analogue with headphones by
sudo amixer cset numid=3 1
then I get the complete sentence from Front_Center or the complete 'white' noise.
However there is no sound from Scratch.
