I’m using the Sparkfun Music Maker shield, and I’m taking the line out output. The shield uses the VS1053 codec. Line output consist of a L & R output, plus an audio ground. For purposes of this discussion, I’m only concerned with the R channel.
What happens if I tie the audio ground to circuit ground?
If I don’t, then what does the R channel signal look like w.r.t. circuit ground?
What happens if I tie the audio ground to circuit ground?
If I don’t, then what does the R channel signal look like w.r.t. circuit ground?