White noise problem

I just finished putting the pedal together, adjusted the trimmer all the way down, and now I have an equal volume level with bypass, as I do without it. I'm trying to consider the source of the white noise I'm hearing. Perhaps there was a step I missed to ground the pedal? What are your suggestions? I put the reverb effect on it, and it sounds good aside from the noise.

EDIT-IRRELEVANT[P.S. I'm using a tube amp.]


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(MORE DETAIL)

I have visually inspected for shorts, and I don't see any; also i've tried with AC power as well as USB power.

I've tried all the .ino programs in github, and I think I have some information that could help detect the problem:

After trying the metronome pedal, I noticed that with the volume turned up, and pass through enabled, I can still here a very low volume beep through my amp.

Please give as much detail as possible if you are thinking of giving me advice, as I am VERY inexperienced in working with electronic hardware.

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(UPDATE)

I've tried the sinewave program, and I'm happy to report that there is no noise there, so the output stage must be okay.. Still, I have no idea how to fix this...

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(UPDATE)

Okay, I found the other threads about the background noise problem, so perhaps I didn't make a mistake in building it. I'm wondering now if anybody has followed any of the suggestions in the other threads with some success.

It kind of sounds like I'm playing guitar in an airplane

Okay, I wasn't sure to post this as a response to my own thread, or the one in the software section.., but one must choose!

I have recorded a sample of the white noise with my recording interface, and the usual amount of gain I use when recording clean this way. I'm going to attach my audio sample as a FLAC, as well as some data I used Audacity to get, so y'all can make your own analysis if you choose.
[EDIT] audio file (in FLAC or compressed as MP3) too large to upload, so here's a link:
copy.com/8CG91uTPBMqiKJGV

I'm pretty convinced that It's just the amount of gain I'm using, and the actual pedal noise is no different than the noise others are complaining about.


The raw data from which this graph is generated is attached as spectrum.txt

The best I've done so far is use a graphic EQ to bring 20k down by 20db, 7k down by 10db, and 160-400Hz down by 3-6db. This helps with the high-pitch ring and doesn't do too much damage as far as I can tell to the guitar signal. I'm still left with a sound like there is air moving through it though.

I hope this helps somebody come up with an idea about this.

I also have the same problem. The pedal effects work relatively well and I am really happy with the build and the whole process. But the noise is an issue that is too noticeable when playing. I will keep looking for help on cleaning up the signal. Any advice is much appreciated.