noisefield wrote:i have it in my effect chain and when it's off it sometimes (depends on settings) make some background noises (it's like it bleed)
I'm unfamiliar with the noise swash, but I know from first hand experience that oscillator bleed can occur while in a true bypass configuration. My 3PDT footswitch was already wired to ground both input and output of the PCB when in bypass, but the oscillator section was nested inside the circuit and able to maintain oscillation with both ends of the over all circuit snubbed to ground. My solution was employing a 4PDT with the snubbing circuit seen at right:
Please note, this configuration was developed to tame my own design, and I cannot tell you where to snub the oscillator (or if it is safe for the oscillator in your Noise Swash to do so). The 20 ohm resistor is the highest value that would reliably snub my oscillator in bypass, and I elected to insert resistance there so the active circuit that oscillates wasn't feeding ground.
It is reasonable to expect you can find a point in the circuit board that will snub the oscillator when shown a low resistance to ground, but I will not be responsible for any harm done in the process.
It's also theoretically possible depending on osc type that engaging the circuit from a snubbed state might incur a noticeable frequency drift while timing components reach an equilibrium charge for their setting after feeding ground.
(Naturally, all of the above assumes that there is nothing intrinsically wrong with the build)