The audio output of my NES is super buzzy taking it from the standard audio out. It's fine for listening but very poor for recording. I am playing custom made NSFs (using FamiTracker) via my PowerPak and the problem is that the buzzing is at a pitch, producing some discords.
Add to that the fact that I may need to record specific channels (meaning I have to record off it multiple times for the same song) and you have a compounding of the problem.
Shiru on #nesdev suggested using a battery instead of the wallwart. This seems to have helped marginally but I think most of the noise is coming from the cartridge and somewhere within the NES audio path.
Since I am using the NES for recording, it seems like I could improve this anyway. I noticed that tapping directly off the CPU audio pins is MUCH better (pin 2 has a faint buzz but it is not near as bad). I found the NES audio path (on the main nesdev site) and noticed it has some funkyness to it. I suspect part of the problem is old / bad components there or some sort of grounding problem.
Long story short, does anyone have any suggestions for making my own audio path? I also have a MidiBox SID and notice that the audio path there is similar. I have also seen designs online that just make use of some resistors off the chip.
The goal is not to fry my precious 2A03 first, and to have better audio as an important second. A third bonus is, if I use multiple outs (one for each pin + cart out for 3 total), I can spend less time recording stuff off the NES since I could do up to 3 channels at a time.
Thoughts?
Add to that the fact that I may need to record specific channels (meaning I have to record off it multiple times for the same song) and you have a compounding of the problem.
Shiru on #nesdev suggested using a battery instead of the wallwart. This seems to have helped marginally but I think most of the noise is coming from the cartridge and somewhere within the NES audio path.
Since I am using the NES for recording, it seems like I could improve this anyway. I noticed that tapping directly off the CPU audio pins is MUCH better (pin 2 has a faint buzz but it is not near as bad). I found the NES audio path (on the main nesdev site) and noticed it has some funkyness to it. I suspect part of the problem is old / bad components there or some sort of grounding problem.
Long story short, does anyone have any suggestions for making my own audio path? I also have a MidiBox SID and notice that the audio path there is similar. I have also seen designs online that just make use of some resistors off the chip.
The goal is not to fry my precious 2A03 first, and to have better audio as an important second. A third bonus is, if I use multiple outs (one for each pin + cart out for 3 total), I can spend less time recording stuff off the NES since I could do up to 3 channels at a time.
Thoughts?