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recursinging / kxmx_bluemchen

A 4hp Eurorack module built on the Electrosmith Daisy Seed
MIT License
50 stars 7 forks source link

Noise #8

Open dennisdebel opened 1 month ago

dennisdebel commented 1 month ago

Hi! I made a pcb inspired by your circuit because my Daisy was so noisy on usb power from my laptop. But now even on battery power (custom psu). It is super super noisy. Any tips? It seems an reoccurring issue with other daisy users… not sure where to go from here (hardware filter, software filter, different daisy revision…?)

dennisdebel commented 1 month ago

After some basic research it seems to be an issue with my code, very basic examples sound fine...I will report back in case I find an obvious culprit.

[edit 1] The output (dac) is clean, the input (adc) is noisy. Still not sure if it is hardware or software related

[edit 2] There are some noise issues mentioned in this thread. It seems my design suffers from the same issues, let me investigate.

[edit 3] after adding 24awg wires to agnd, dngd to eurorack psu, the noise is about 50% less. A simple rc lowpass filter did the rest