Summer Chip is a summer for the lesser-used formats to have their selection of custom music specially made for them. The following SNES tune does, to some extent, eventually bring the NES and the SNES together (the NES waveforms obviously being sampled)... without the NES's own noise (that's due to the fact that SNESMod doesn't support noise generation, though theoretically I could have programmed that in... and I decided against sampled noise due to memory limitations for a good quality noise).
The samples do not come from any SNES game in particular (actually, I can guarantee some or most of these were never used in a SNES game back in the 1990s), and as a matter of fact, a few of the chip-samples were custom-produced by me by raw importing a text file I made in HexEdit so I could get the best result.
The SPC700 memory is jam-packed with 54 patterns (SNESMod can only take up to 64, so I'm pushing it here), 22 samples with their lengths totaling to 40,720 (that's quite a bit... at 44,100 hz sample rate, that's roughly one second worth of music... and you can only fit around two and a quarter seconds of that in there at a time!), and echo with a 32 ms delay, complete with non-normal FIR parameters (I'm probably one of the very few, if not the only person in the world that has fooled around with this one... though I may be wrong). Hint: The echo is not always on...
I also tagged the SPC myself. This tune is longer than three minutes... yes, you heard me, it's longer than three minutes. It goes on longer than three minutes!