static-like noise on raindrop_hui TDA1541a kit

[niek024]

Originally Posted by Torchwood421

Do you have USB input by chance? If you do and that is noise free then that would still suggest that the Wolfson input receiver chip is bad or some issue around the chip.

Sorry I didn't reply sooner; but i have been unexpectedly busy at work.

I've tried the usb-input of the DAC-board. It turned to work under Linux as well, by the way. This is what I found out. It doesn't make the matter easier, i'm afraid...

Under Windows XP, there's a similar crackle on the right channel, accompanied by a slight flicker in led D1 (lower right corner of the board), apparently signalling a signal-error.

Under Linux (Ubuntu 11.10), i could not detect a disturbance in sound, nor in led D1.

Very strange, but maybe the Linux USB-sound driver outputs a constant signal, even when there's no sound; the noise (as described earlier) only occurs at the start of a music/sound signal...

Any ideas what could be wrong?

[niek024]

I have just been contacted by Hui. She suggested that the noise could be caused by faulty connections of the capacitors around the TDA. I will try that as soon as i'm at home. That will by in 3 or 4 days. Will let you know what the findings are.