Man in a van wrote: > I don't know why you get the noise. > > I have connected the rpi usb to several different dac without any > noise. > > I never hot plug the usb connection, always connect without any power, > then power the dac first, then the pi. > > What is your set-up > > can you try another dac?
Thanks for that. I got a Soekris DAC1101 that goes (directly) into two monoblock Crimson 75W (continuous) power amps that feed two Rehdeko RK125 speakers with 102db / 1W / 1m efficiency. The power Amps and high efficiency speakers make the system probably particularly sensible also for noise. And given that the soekris DAC has only a digital volume control, so I assume that it attentuates the volume of what gets digitally into it, however, analogue noise seems to get through the DAC and fully amplified, thus its really loud. The thing is, when the RPi is shut off, this noise is not audible and starts sounding when the RPi is powered on. Which means, it comes from there. I will get myself a passive analogue attentuator (simply a good poti in a box aka a "passive preamp"), which will hopefully reduce the issue, as the DAC will then play at full volume and not alter the digital information at all. Anyway it should sound better. However, this setup allows me for now to detect this noise issue and I hope to eliminate it, too. ------------------------------------------------------------------------ diego's Profile: http://forums.slimdevices.com/member.php?userid=40897 View this thread: http://forums.slimdevices.com/showthread.php?t=110352 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
