[Chip Mod] Naoki Kodaka - "Stage 2" (Journey to Silius, NES) [Oscilloscope Visualization]
"Underground Concourse", the song from stage 2 of the NES game Journey to Silius, composed by Naoki Kodaka. This was played from a modded NSF file with the DPCM samples fixed to be the right order. You can get it here: https://url.kylxbn.com/74dFxp
This recording was made using a modified virtual NES sound chip, the 2A03. It was emulated from a modified NSFPlay. The source code is available from my GitHub repository: https://github.com/kylxbn/nsfplay
The modifications are as follows:
Floating point mixing and volume adjustment for all channels
Linear mixing of all 2A03 channels (to avoid DPCM/Triangle volume loss)
Triangle wave is generated with a pure (non-quantized) triangle wave
Triangle wave is volume-compensated with an equal loudness contour (ISO 226:2003)
Noise subsampling is downsampled with floating point math (not audible, to be honest)
VRC6 sawtooth wave is generated with a pure (non-quantized) sawtooth wave
VRC7 mixing is done in floating point to prevent quantization noise
N106 updates channels simultaneously per sample, instead of a round-robin implementation
N106 actually mixes channels instead of multiplexing each channel
maybe some small tweaks I forgot