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Computer USB Sound Card / Guitar-to-PC Audio Interface

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Westted

Joined Jul 26, 2026
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I just need to know if the circuit itself is going to work, because I'm currently not able to simulate it and I need confidence to continue with the PCB design. It is a simple audio interface for a guitar, it consists of a preamp (Hi-Z), the codec (PCM2900C), and an amplified output with a headphone driver connected directly to the output jack. Oh, and everything is powered by the PC's USB port, except for the codec's analog section, for that, I used an adj regulator to ensure greater stability. I ask that you ignore the separation of the GNDs; it's mostly for clarity. On the PCB, everything will share the same ground, and I'll figure out how to deal with the noise (I can't use multiple layers). I'm a beginner at design, so I would love to hear y'all! thanks in advance.
 

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