Fluttering noise from TDA1543/CS8412 DAC

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
As the end of each track fades out I get a fluttering, hissing sound in the left channel, until the track stops. There's no noise on the "dead space" between tracks. I also get a weird kind of distortion, like pops and clicks.

I don't think anything's broken, as swapping chips doesn't change anything.

Something to do with grounding, perhaps?

My DAC's in a 3D layout a la Peter Daniel, with all grounds soldered to a piece of copper foil glued on top of the CS8412. I use LM317 regs and passive resistor output.

Any suggestions?

TIA
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.