Has anyone actually fixed the daisy seed whine? I used filters in code but it kind of bogged the system down so took them out. I then put 2 470uf (highest I have on hand) caps in from the vin to ground, I also put 2 470uf for the 4x4 neopixel buttons. It worked with the breadboard going to a regular outlet, but would always have it when connected to usb port. I now have soldered it to a perfboard and applied a ahem, fine amount of hot glue to secure into place. My issue is now it does the audio whine regardless of power source. Everything is the same wiring and still secure, tried different cords for power and audio, different outlets/blocks, nothing seems to work. It does seem the whine is better with an outlet vs the pc usb but its a very minute difference. Heres a link showing the whine with this project https://youtube.com/shorts/AzfR1ui51XI?si=IN_X0tKGeHAJG1je
The project looks awesome!! Happy to troubleshoot with you 
Did the noise start to happen when you moved your circuit from breadboard to a perfboard? Typically, breadboard is the noisier one.
Yes, USB power from the laptop can be noisy so powering from a different supply should help.
Other questions I have are:
- What’s your block size?
- What’s your audio playback system like?
- Could you unplug your LED and see if the noise persist?
Thanks!
No the noise has always been there tho admittedly, I have it going into specific software filters in my daw usually vs the speakers in the video. With usb in computer, it seems to whine a lot, the outlet didnt do as much but that couldve also been from me doing the filters and not noticing until now. My audioblocksize is 16. Ive tried with an outlet, different usb ports in my desktop tower. I use an audio interface usually going to fl studio with 2 filters, Im not home atm but I believe one is set to around 9khz and the other at 11.5khz. I could be wrong though. Since the circuit is soldered now, not really a way for me to test if still there with leds plugged not plugged it as I soldered to the board instead of using the qwic or whatever they call it plug in adapter. I do get slightly different pitches/volume of whines in different menus anyways within this project which would suggest the leds contribute. I have noticed the whine from the seed in other projects that had no leds but the leds may accentuate it a bit, its been a good while since I did any project besides this one so hard to remember if it was as noticeable. In the video I linked, I had the power coming from outlet, with its audio out going to a 5v mixer which was also at an outlet, the mixer then sent to 2 cheap house speakers. They sound fine with my mono station, circuit, behringer or volcas playing but not this one (strumkeys).
Thank you for the information!
Could you please try outputting just a sine tone (at like 440 hz) and set the blocksize to 2?
And I think it’ll be good to connect the output to an audio interface and listen via DAW.
Let me know if the noise persists.