Can be very important for RF. Usually of no consequence for audio, except perhaps in capacitors in a precision filter. As the stray capacitance in a chip package will be small it will be insignificant for audio.
Since all ICs have resistance, capacitance, and inductance-do they not act as filters to some extent? Then does DF come into play? Regards
Estimate the stray capacitance in a chip package. Calculate the impedance for 20kHz. Estimate the effect of even poor DF.
line level impedance, audio frequency, home system lengths? not an issue
PE, PP are great too - lots cheaper
for audio line output with ~<100 Ohms output Z, few 10s ft of 20 pF/ft cable - the fc is in MHz
so for audio any C effects are already < 1/100 of the divider Z at 20 kHz
and DF # are 10^-4 for PE, PP - so DF would be a ppm effect at 20 kHz, less below
PE, PP are great too - lots cheaper
for audio line output with ~<100 Ohms output Z, few 10s ft of 20 pF/ft cable - the fc is in MHz
so for audio any C effects are already < 1/100 of the divider Z at 20 kHz
and DF # are 10^-4 for PE, PP - so DF would be a ppm effect at 20 kHz, less below
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What is the source impedance? Well-engineered source with low impedance? Idiosyncratic 'high end' source with high and (possibly) non-linear impedance?
80 ohms into whatever cable capacitance you have (calculate it) will form a low pass filter (calculate). The dielectric DF may modify this by effectively adding series resistance to the C (calculate). Put some numbers to it, as jcx did in post 5. Then you can determine whether you think it is likely to be an issue. Without numbers we are all just guessing.
For analog audio interconnects, poor high radio frequency performance is a blessing. As only interference lives at these high frequencies.
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