PeteB wrote:rikardo1979 wrote:
- get new TV which dont push noise over HDMI - very expensive option
- dont use HDMI in HiFi - highly recommended
- dont use this measuring software, so you would not know (if the noise is not audible) - best solution
Hi Rikardo,1 - I tried only the one TV, but a couple HDMI monitors, same results.
2 - Yes, I really prefer headless anyway, and I am looking into a 2-line display.
3 - Bbbbut: my other software is even more sensitive than this middlin' sound card! How can I live with myself if I don't solve this?
Ok, seriously, it is audible with plain vanilla 55-ohm AKG headphones, and a middling headphone amp, IF I use the hardware volume control at normal listening levels. If I don't, not audible, so I can make it go away by pushing the noise down. Still, it is annoying to be limited to about 14 bits resolution when you are playing 24-bit material...
The best solution for now is to keep all noise sources away. The TV is not the source, the HDMI is just the conduit to the noise. If you look at the graphs above closely, you will notice a 60 Hz (mains freq) peak on the green trace. By contrast my rotating disk drive only adds a tiny bit of noise, and the stock p/s only a little bit more.
edit:
Anyway, this is supposed to be a software forum, so I will do my best to stick to that from now on...
im with you. I dealing with noise myself at the moment.
I just got few LPS units. One for RaspDAC, one dual unit for my TT and phono stage.
Now I found that one of the cheap PSU s for Raspberry is pushing a lot of noise back to grid.
So I need to buy another LPS ...
More money to spend
OP2