yes when software activates dss (Wolfenstein 3D running) and plays no sound, there is also no noise at all. Sound is clear.
only if dss is uninitialsed there is buzzing noise from it.
Looks like something is in a undefined state.
Audio in >---C----> Audio Out
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R
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GND
matze79 wrote:so using a 25kOhm Resistor and a 100nf for a simple high pass would suffice ?
This should cut off anything below 60hz right ?
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Audio in >---C----> Audio Out
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R
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GND
I tried that the other day ... tying the clock to the FIFO's empty/full signals (CLK NAND FULL, CLK NAND !EMPTY, CLK NAND EMPTY), which only lead to the DSS having issues being detected. As of now it's constantly clocking out data when activated.Jepael wrote:Maybe the problem is something else than powerline frequency coupling, if it is silent when initialized?
Like if the fifo is empty and the clock is still clocking data out? Should it be stopped/gated when fifo is empty so no more data is popped out?
EDIT: 74HCT573 (CLK connected to FULL) added to the data lines between DSS emulator and covox didn't help either.
Trying different PSUs only made things worse.
I suspect a ground loop somewhere by now.
shock__ wrote:Amplifying the noise helped ... 72Hz seems to be the frequency of the noise I'm getting (7524 based DAC)
matze79 wrote:from Amp Output, also happens without Amp (only when DSS is not active)
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