New project of DAC with sounding of studio tape recorder

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So, I am starting new development. It is based in my previous researches. Main chip of DAC is Philips. The output is current. My self developed circuit has extremly low input impedance. It provides the highest resolution of sound, like a studio analog tape recorder.
 
My dear friend! I'm very sorry. I don't place the circuit here and any where. This is commercial project. I developed it in some years. Please note, now, I use wire capacitors, hand made by me. It provides the best sounding.

Please tell us what problems with the prior art you identified and solved? For example what's wrong with normal capacitors which led you to develop your own?
 
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