iiinova — where your digital self keeps evolving

Persune @gumball2415.github.io · 10/09/2026

this is what it looks like after being encoded by my composite encoder, and then decoded by vhs-decode's cvbs-decode library

test card of eight swatches per row, with a resolution test first, then the solid color after. this is after being modulated to composite NTSC video, then modulated back to an RGB image. the aspect ratio is different due to the way cvbs-decode handles composite video sampling.

first row: 100% white, yellow, cyan, green, magenta, red, blue, and black

second row: linear ramp from white to black in eight steps

third row: 75% white, yellow, cyan, green, magenta, red, blue, and black

fourth row: just an image of my Everdrive N8 Pro on my AV famicom, and my red stuffed rabbit "Dulpo" holding an NES controller.

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Persune @gumball2415.github.io · 10/09/2026

made a lil test swatch just to point and poke at composite signals; loosely based on the EBU color bar tests

test card of eight swatches per row, with a resolution test first, then the solid color after

first row: 100% white, yellow, cyan, green, magenta, red, blue, and black

second row: linear ramp from white to black in eight steps

third row: 75% white, yellow, cyan, green, magenta, red, blue, and black

fourth row: just an image of my Everdrive N8 Pro on my AV famicom, and my red stuffed rabbit "Dulpo" holding an NES controller.

test card of eight swatches per row, with a resolution test first, then the solid color after. this is upscaled 4x in resolution with nearest-neighbor interpolation to preserve the hard pixel boundaries.

first row: 100% white, yellow, cyan, green, magenta, red, blue, and black

second row: linear ramp from white to black in eight steps

third row: 75% white, yellow, cyan, green, magenta, red, blue, and black

fourth row: just an image of my Everdrive N8 Pro on my AV famicom, and my red stuffed rabbit "Dulpo" holding an NES controller.

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Persune @gumball2415.github.io · 18/12/2025

when i see your name on my screen my stomach flutters and my heart races you make me weak in the knees your memory ricochets through my faces i loved you i can't help it, in my reckoning i miss you come back soon, my rikka-nee

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Persune @gumball2415.github.io · 20/11/2025

measuring MDFs of my interface once more. MDF 96k tests for either headphone jack or OUT1/OUT2, with or without -18db of padding, and matching input levels, or minimizing saturation. all permutations. more info in readme.txt download: mega.nz/file/L2xgVKZ...

MDFourier graph showing the overall frequency response of my UMC202HD. the averaged line is within +-1.5dBFS.

my Hosa RCA cables, supplemented with metal chassis RCA to 6.35mm headphone jack adapters.

a top view of my UMC202HD in the OUT1/2 loopback configuration. my Hosa RCA cables, supplemented with the RCA to 6.35mm jack adapters connect OUT1 and OUT2 to IN 1 and IN 2 respectively. also connected is the USB type B cable, and my IEMs for monitoring audio. the taped on the top of the interface reads "MIC Impedance 3K Ohms", and "INST Impedance 1M Ohms".

a front view of my UMC202HD in the headphone loopback configuration. my Hosa mono 6.35mm jack to stereo 3.5mm jack, supplemented by a 3.5mm to 6.35mm stereo adapter, connects the PHONES jack to IN 1 and IN 2. also connected is my IEMs for monitoring audio.

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Persune @gumball2415.github.io · 07/11/2025

the mind electric vocal cover proof-of-concept it's hard to compete with a vocoder in terms of pitch accuracy... varisped my voice because i can't sing baritone anymore

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Persune @gumball2415.github.io · 18/10/2025

so retro, i'm sure it's been done to death but it's still pretty neat to transcode to composite and back in realtime

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Persune @gumball2415.github.io · 15/10/2025

followed a tutorial which was recommended to me now i can make any kick i want (909 snare for contrast)

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Persune @gumball2415.github.io · 02/08/2025

made a (barely functional proof-of-concept) WASM+JS shell for Pally, a NES palette generator This uses the fresh Rust port, so some features may be borked or not present. gumball2415.github.io/src/pally/pally-web.html #nes #nesdev #2C02

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Persune @gumball2415.github.io · 02/08/2025

rust wasm is something what i expected vs what i got

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Persune @gumball2415.github.io · 25/07/2025

it's alive! Pally in Rust doing the bare minimum NES color palette generator based on encoding and decoding the PPU's (emulated) composite output github.com/Gumball2415/...

$Code of the main execution flow in Rust programming language. it reads: /// Runs the CLI pub fn run_cli() -> Result<(), Box<dyn Error>> { // parse arguments // Get default black/white points? // construct encoder and decoder let pally = PallyGenConfig::new(); // generate colors let palette = generate_colors(&pally); let path: &Path = Path::new("test.pal"); // save colors save_colors(path, &palette) }$ A screenshot of Mesen2's NES video setting dialog window. In the background of the dialog window is the full_palette test ROM, which shows all the possible colors of the NES.

The test palette from Pally is loaded in Mesen2!

A screenshot of Mesen2's NES video setting dialog window. In the background of the dialog window is the full_palette test ROM, which shows all the possible colors of the NES.

The test palette from Pally is loaded in Mesen2!

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Persune @gumball2415.github.io · 22/07/2025

what if i did it again for the third time

$A screenshot of a Windows command line interface output. it reads: C:\Github\Gumball2415\pally>cargo run Compiling nes_ppu_cvbs v0.2.0 (C:\Github\Gumball2415\pally\nes_ppu_cvbs) Compiling pally v0.1.0 (C:\Github\Gumball2415\pally\pally) Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.90s Running `target\debug\pally.exe` black is 0.312! the samples generated from color $01 000: [0.228, 0.228, 0.228, 0.228, 0.228, 0.616, 0.616, 0.616, 0.616, 0.616, 0.616, 0.228]$

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Persune @gumball2415.github.io · 14/07/2025

otoh, i wonder if i could do DSP convolution using iterator adapters...

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Persune @gumball2415.github.io · 12/07/2025

# 2025-07-12 12:35 - The Book: 12.3 - Rustlings: 94/94 (done) - RBE: 24 (done) yipee, apparently i already finished Rustlings! now i can focus on finishing The Book

The success screen at the end of Rustlings. A big ASCII art depiction of Ferris is shown with a speech bubble saying, "You made it to the Fe-nish line!". The latter text mentions about user feedback regarding the Rustlings program, as follows:

We hope you enjoyed learning about the various aspects of Rust!
If you noticed any issues, don't hesitate to report them on GitHub.
You can also contribute your own exercises to help the greater community!

Before reporting an issue or contributing, please read our guidelines:
https://github.com/rust-lang/rustlings/blob/main/CONTRIBUTING.md

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Persune @gumball2415.github.io · 11/07/2025

# 2025-07-11 12:39 - The Book: 11.3 - Rustlings: 94/94 - RBE: 24 (done) yipee, finished Rust By Example! now i can complain about it Rust By Example feels like refresher for those who already know Rust like, this isn't a good introduction lmao

A list of sections of the first chapter of the Rust By Example book. They are listed as follows:
1. Hello World
1.1. Comments
1.2. Formatted print
1.2.1. Debug
1.2.2. Display
1.2.2.1. Testcase: List
1.2.3. Formatting

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Persune @gumball2415.github.io · 10/07/2025

# 2025-07-10 13:36 - The Book: 11.3 - Rustlings: 92/94 - RBE: 23 sometimes i think The Book is pushing me to be a smartass.

$A Rust programming language question which asks the following: Consider a program with the following unit test: ``` #[test] fn test_the_logger() { /* ... */} #[test] fn test_the_database() { /* ... */} #[test] fn test_logger_and_database() { /* ... */} ``` what is the shortest sring you can pass to `cargo test <the_string> such that only `test_the_logger` and `test_the_database` are executed? My answer was `test_the_`, while the correct answer was `h`.$

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Persune @gumball2415.github.io · 02/07/2025

i have been spending the last two weeks tweaking this script nonstop apparently one day i'll make a UI for it... github.com/Gumball2415/...

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Persune @gumball2415.github.io · 18/06/2025

a tiny NES composite preview script; generates individual frames animations stitched together with ffmpeg art by @provolonecinco.com from project SHVTERA github.com/Gumball2415/pencil-case/… #nes #nesdev #2c02

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Persune @gumball2415.github.io · 16/06/2025

i guess having an autocorrect that spans an entire paragraph might be neat but i'm concerned about this convenience building habits that companies can profit over and eventually fuck us up with. ew. i'd rather build muscle memory with my hands than simply glancing at code that i didn't type

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Persune @gumball2415.github.io · 05/06/2025

i be remy in the kitchen the way i cook behind the scenes EPSM daughterboard module for the EPSM modular proto

KiCad schematic of $4016 and $401C-F address decoders, used for OUT1 latching and further logic for EPSM

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Persune @gumball2415.github.io · 31/05/2025

this week's short singing practice (choir) service of the fe, fi, fo, fum

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Persune @gumball2415.github.io · 23/03/2025

6-part chord test need to figure out how to generate just intonation tuning LUTs... #vrc7 #chiptune #2A03 #famicom #nes #famitracker

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Persune @gumball2415.github.io · 17/03/2025

i discovered what a 303 is some more sound design experiments #bass #303 #reaper

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Persune @gumball2415.github.io · 13/03/2025

cover of "ink1" by greenhouse, one of my favorite tracks from this alias. #nes #famicom #2A03 #chiptune #VRC7 #OPLL

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Persune @gumball2415.github.io · 12/03/2025

"farsight" vrc7 jam. based on an unused track by greenhouse #famicom #vrc7 #fm #opll #nes #famitracker

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Persune @gumball2415.github.io · 23/02/2025

new version of squeeki-kleen! Video FC now with wider holes, and additional empty bypass caps in case you need to filter specific noise bands. github.com/Gumball2415/squeeki-klee… #nesdev #openhardware #homebrew #hardware #nes

3D preview of the modboard PCB. text reads: squeeki-kleen! Video FC; CVBS bypass amplifier; v.1.1.0 © Persune 2025; open source hardware; S&S H.W.

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Persune @gumball2415.github.io · 03/02/2025

messing with some more kick design, i wonder when i'll get the hang of this #vital #kicks

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Persune @gumball2415.github.io · 29/01/2025

a more familiar version (the post above was the F.I.A.B. remix)

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Persune @gumball2415.github.io · 29/01/2025

guess who recorded firework IRs in their bathroom during new year's

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Persune @gumball2415.github.io · 30/12/2024

DPCM timbre management is finnicky... dpcm drums on rate $C vs rate $8

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Persune @gumball2415.github.io · 18/10/2024

I wanted to do over my EPSM FC after a few nonworking and partially-working prototypes. I expanded upon the initial daughterboard idea from Perkka and added a couple more. #nesdev #hardware #homebrew #chiptune #EPSM #nes #famicom #opensource

Circuit schematic of the address, data, and audio daughterboard connectors.

PCB layout of the EPSM Famicom modular PCB.

3D render of the EPSM Famicom modular PCB.

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