Im trying to record output from an old synth chip (YM3812). The output waveform is centered around 2.5V with peaks at approx. 2.5 +- 1.5V. I can easily connect a pc speaker with a TSSR cable to hear the sound. I connected 2.5V to GND and the audio signal to either the left, the right or both audio channels.

My problem: If I try to record the signal with a PC line input, the signal is clamped at 2.5V. Every part of the waveform that is "negative" relative to GND is removed.

Do you know, why my speaker could handle the negative voltages, while the line input just clipped? Should I connect 0V to GND instead of 2.5V?

Im trying to record output from an old synth chip (YM3812). The output waveform is centered around 2.5V with peaks at approx. 2.5 +- 1.5V. I can easily connect a pc speaker with a TSSR cable to hear the sound. I connected 2.5V to GND and the audio signal to either the left, the right or both audio channels.

My problem: If I try to record the signal with a PC line input, the signal is clamped at 2.5V. Every part of the waveform that is "negative" relative to GND is removed.

Do you know, why my speaker could handle the negative voltages, while the line input just clipped? Should I connect 0V to GND instead of 2.5V?

Edit: This is the relevant part of my circuit:

^{simulate this circuit – Schematic created using CircuitLab}