I’ve been trying to get a guitar tone this morning on my Raspberry Pi 4 B + Hifiberry DAC+ ADC (which has a microphone input) without much success. I’ve A/B tested the various output speakers, cables and connectors and everything points to something within the Pi significantly affecting the signal fidelity.
The “muddy” signal is coming from my stratocaster (with the distinct clean, glassy tones) into the DAC+ ADC mic input, into a single mixer strip in Ardour 6 + jack, then back out the dual RCA outputs of the DAC+ ADC into a keyboard amp.
As I typed that previous paragraph, it became pretty obvious to me that the issue is probably with my line-level guitar coming into a mic jack, but I’m not well versed in audio engineering and signal types so I don’t really know. So two questions:
How do I test the purest possible signal through this Pi? Like direct from the mic input to the output with as little between as possible?
If the issue is line-level guitar into mic input, what are my options? An adapter? Print a new hifiberry board with line input instead of mic?