I have been using Sonic Pi recently and have been annoyed by a persistent stream of white noise. This has happened on both Raspbian and Ubuntu MATE 16.04 for Raspberry Pi, using SENNHEISER MX356s. Is there any way to stop this?
Per the comments below the question, the Pi's 3.5mm audio output is not a good output. I try to avoid it where possible. I have yet to see a convincing writeup of any approaches which would eliminate the noise from the analogue jack sufficiently for it to be used for enjoying music.
Your options for usable audio are:
- An HDMI to analogue converter with analogue output jack such as this one by Tendak
- An i2s based audio card such as the HiFiBerry or Pi-DAC+
- A USB soundcard such as this one from Adafruit
I've tested a few variations on each of these approaches, and they all seem to work fine.
The question is a bit old, but nevertheless: Add
(Source: https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=136445, worked with my pi)
Try burning another SD card with a different OS. I get white noise and static on Raspbian Stretch, but I used a different OS a very long time ago (Kano OS) and the audio quality was perfect.