Legend 
It will be interesting to see where that goes, but I suspect Electrosmith will want to maintain a clear separation of concerns. Sometime soon, I need to fire up the Arduino IDE, get familiar, and have a think about how best to support it; ideally, in the form of a complement to/extension of DaisyDuino. (I have exactly 0.0 hours of experience with that ecosystem, so “good intentions” and all that …)
I ordered a hothouse a few weeks ago and I’m loving it! I’ve written an overdrive effect as my first foray into DSP and I’m really happy with how it has turned out. One thing I’ve discovered is that at the default block size of 48 and default sample rate of 48kHz there is 1kHz noise coming from the ADC. It appears that this is a known issue with the daisy seed (see https://forum.electro-smith.com/t/questions-about-digital-noise-and-grounding/) where there is noise at the frequency sampleRate/blockSize. In that other thread there are several hardware workarounds mentioned, and I’m not sure if the hothouse is using any of those, but I’ve resorted to reducing block size to 4 samples at 96kHz sample rate to move the noise up to 24kHz and out of the audible range. This is probably not an issue for most use cases, but I am boosting the input signal by up to 96 db at which point the noise becomes significant. I wanted to point this issue and my workaround out in case anyone else runs into the same problem.
Hey jeffffff,
I don’t have any 1kHz noise in my hothouse. The fact that this frequency is aligned with the frequency of the data blocks (48 kHz / 48 samples = 1 kHz) makes me think that you have a bug in your software and that it’s not a problem with the hardware.
Can you post your code? Or, can you share a github link?
Here is an example reproducing the 1kHz noise issue with minimal modification to an empty effect from “create_new_proj.py”: https://github.com/jeffplaisance/HothouseExamples/blob/main/src/EmptyExample/empty_example.cpp
what it looks like in a spectrum analyzer with no input, there is a clear spike at 1kHz (and also 8 kHz):
I’m almost certain it’s not a software issue. FWIW, the 1kHz noise is only 10-15 db above the noise floor, and the noise floor on the pedal is pretty low! It is unlikely to be an issue for anything other than an overdrive/distortion/fuzz pedal or maybe a compressor pedal. I didn’t mean this as a criticism of the Hothouse in any way, I think the hothouse is really great and would strongly recommend it. Just wanted to let people know how to work around this issue in case anyone else happens to run into it.
