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Just to check for the obvious, you do understand that you have to replace (sid) with an @ sign, right? And also remove the spaces. It's written in this way to prevent spammers from figuring out the address.

Leftmost one might be a screen magnifier. The next one after that looks for all the world like an FM radio powered by the GBA. The small thing looks like a headphone adapter. And then a 3rd party link cable. The plastic blob in the middle of the cable is a multiplayer connector with a socket. Then there's a car charger, but you likely figured that one out already.

I think that's a good time to stop this discussion.

There are other pics of him, like this one. Definitely him.

I once had a post about his chiptune theft adventures. I unpublished it after he seemed to honestly want to make his own music and be a part of the community, but now I'm considering whether that good will is lost and I should republish the post.

A headphone output is an unbalanced circuit. Using a T or a Π type attenuator would likely be way overkill for your application. The point of those topologies is to match the impedance of both the input and the output in order to avoid signal reflections, which is mostly a problem for high frequency transmission lines.

You should use an L type attenuator, that is a two resistor voltage divider, but you may be able to get away with just a series resistor. The downside of just putting a resistor in series is that the attenuation will vary with the impedance of the headphones, if you have multiple different pairs of headphones that you wish to use with the same soundcard. Just shooting from the hip, you should aim for a resistor value that is slightly lower than the headphone impedance. Lower value = less attenuation. This could be done externally without modifying the soundcard, if you get a siutable stereo plug, and jack that you can use for an adapter. Standard 1/4 W resistors should be sufficient for this task.

Another option is to modify the soundcard internally. There will probably be a headphone amplifier. If you can attenuate the signal before going into the amplifier, you could apply a constant attenuation regardless of the headphone impedance. I could probably help you with that, but then I would need something to go on, preferably pictures of the internals of the soundcard around that area of the board.

See this thread, and especially my posts: http://chipmusic.org/forums/topic/14290 … us-or-not/

The bottom line is, it's likely an automated copyright request that matched your song based on the notes in it, which likely were similar enough in pitch and volume curve to look like the original song.