Hello all,
I've been trying to track down the source of artifacts in wavetables I've been importing and am becoming increasingly convinced its the signal to noise ratio. I have read the multitude of posts concerning ground loops and usb noise. I was considering purchasing these objects but in all objectiveness this project is starting to exceed it's cost and I'm hesistating shelling out 45 bucks for an unsatisfactory solution. I have the T4 directly atop the audio shield with clean solder joints, but I am picking up 129 mV of noise regardless of whether I power it via usb or a dedicated supply. It goes down slightly with the PS but not enough to matter. Anyways long story short, I have 23 mV noise coming from my Tinkerboard 3.5 jack... vs 129 on the T4. How effective can I hope isolation to be? Is it feasible to approach PC line out noise levels? The signal distortion is enough that it basically makes any real polyphonic synthesis quickly sound like well, not good enough for professional music applications lets just say that. I'm half tempted to focus my efforts on a JUCE synth for the tinkerboard to provide the same functionality.
Any advice would be appreciated.
I've been trying to track down the source of artifacts in wavetables I've been importing and am becoming increasingly convinced its the signal to noise ratio. I have read the multitude of posts concerning ground loops and usb noise. I was considering purchasing these objects but in all objectiveness this project is starting to exceed it's cost and I'm hesistating shelling out 45 bucks for an unsatisfactory solution. I have the T4 directly atop the audio shield with clean solder joints, but I am picking up 129 mV of noise regardless of whether I power it via usb or a dedicated supply. It goes down slightly with the PS but not enough to matter. Anyways long story short, I have 23 mV noise coming from my Tinkerboard 3.5 jack... vs 129 on the T4. How effective can I hope isolation to be? Is it feasible to approach PC line out noise levels? The signal distortion is enough that it basically makes any real polyphonic synthesis quickly sound like well, not good enough for professional music applications lets just say that. I'm half tempted to focus my efforts on a JUCE synth for the tinkerboard to provide the same functionality.
Any advice would be appreciated.