Hacker News: nyanpasu64

New comment by nyanpasu64 in "Fixing analog audio on the $2.58 HDMI-to-VGA adapter"

nyanpasu64 — Wed, 08 Jul 2026 22:48:12 +0000

Definitely something to look into, but I checked on eBay and they seem to have captive screw connectors I'd have to assemble a cable from. Not impossible but another thing for me to look for.

New comment by nyanpasu64 in "Fixing analog audio on the $2.58 HDMI-to-VGA adapter"

nyanpasu64 — Wed, 08 Jul 2026 22:34:13 +0000

There are photos at https://www.aliexpress.us/item/3256806185045998.html (I didn't insert one into the article), and a cross-section near the end. I could take a photo of the dongle with heatsink, but not unmodified dongle.

New comment by nyanpasu64 in "Fixing analog audio on the $2.58 HDMI-to-VGA adapter"

nyanpasu64 — Wed, 08 Jul 2026 22:31:53 +0000

I didn't realize the filter leaked this much AC until I had been using the "working" board for weeks, without audible distortion (but it's still theoretically there). And I'd have to run another power cable to the filter board, since 3.5mm doesn't supply power. It's possible the cable would result in distortion/radiation in the MHz range if the filter isn't located near the chip, but I don't know if this is a problem in practice. It might be something to work on in the future?

New comment by nyanpasu64 in "Fixing analog audio on the $2.58 HDMI-to-VGA adapter"

nyanpasu64 — Wed, 08 Jul 2026 22:27:02 +0000

> I'm not sure where to source straddle-mount VGA connectors. Alibaba has a product listing that describes the same part found in my DAC, but has no pictures of the actual product.

> I also found straddle-mount VGA to break off the board easily

> All of this is possible... but it's a lot of work for an incremental upgrade that doesn't resolve the jitter and audio dropout problems. Compare this to the HDMI2SCART which required more manufacturing effort, but fulfilled a previously unmet use case; even then the author stopped selling them himself because he couldn't find a better source for chips.

New comment by nyanpasu64 in "Fixing analog audio on the $2.58 HDMI-to-VGA adapter"

nyanpasu64 — Wed, 08 Jul 2026 22:25:09 +0000

IIRC HDMI/VGA is I2C and can drive an I2C display, but it's normally only used for EDID display identification and DDC brightness control.

New comment by nyanpasu64 in "Fixing analog audio on the $2.58 HDMI-to-VGA adapter"

nyanpasu64 — Sun, 05 Jul 2026 18:58:34 +0000

3.5mm, I now know why conventional consumer audio devices don't use mixers, they're a ground loop party

It's also that I don't know how to build a differential input not limited to power supply range, I do think they are sold and I have a mixer at home but it's somewhat bulky for my computer desks.

New comment by nyanpasu64 in "Fixing analog audio on the $2.58 HDMI-to-VGA adapter"

nyanpasu64 — Sun, 05 Jul 2026 17:26:19 +0000

The CS5213 appears pinout-compatible with the MX929x, interesting. The AG620x is a chip I've had the misfortune of encountering; it was common in Amazon DACs, dropped signal output every 15 minutes or so unless you disconnected the EDID pins from the (monitor?), and interprets input signal in a cursed fashion where 16 or below produces black but only 255 produces full white. If your computer outputs limited range HDMI the analog signal can't reach white, but if your computer outputs full range HDMI the shadows are clipped. This is one of the chips that gave HDMI DACs a reputation for black crush and caused CRT communities to recommend DP.

Interestingly the MiSTer game system community actually patched their FPGAs to output digital signals from 16-255, and have some other way of avoiding the signal dropouts (never talk to EDID?), so this chipset is almost seeked out over incompatible models.

New comment by nyanpasu64 in "The RCE that AMD wouldn't fix"

nyanpasu64 — Fri, 12 Jun 2026 08:31:34 +0000

It doesn't smell like a state actor to me, just gross negligence. Brushing up on the Reddit comment we wrote, the MITM isn't exploitable by default, since the client will error out at the 301 redirect and leave an obvious black window on the user's desktop. Exploiting a user would require replacing the 301 redirect with a direct download, which requires the same amount of effort whether the default disclosure was broken or not.

Now if they could've started shipping a modified AMD auto update that followed redirects, that would allow them to pwn users of the updated program. But it would do nothing to people who had installed older versions, up to the version the author installed (which left a black window open indicating the downloads never completed)...

New comment by nyanpasu64 in "Estrogen: A Trip Report"

nyanpasu64 — Thu, 19 Jun 2025 23:29:17 +0000

I think that trans people, being the ones with firsthand experience of dysphoria and misgendering, and being a disadvantaged minority (https://www.mckinsey.com/featured-insights/sustainable-inclu...) threatened by right-wing rhetoric, should be the ones to speak for what is right for them ("nothing about us without us"), individually and as a group.

New comment by nyanpasu64 in "Estrogen: A Trip Report"

nyanpasu64 — Thu, 19 Jun 2025 23:01:15 +0000

On top of that, legislatures, courts, and right-wing agitators are pushing to repeatedly worsen living conditions for trans people.

New comment by nyanpasu64 in "Estrogen: A Trip Report"

nyanpasu64 — Thu, 19 Jun 2025 22:48:18 +0000

I'm pretty sure they're still allowing puberty blockers for premature puberty, inducing puberty in cis teens, and surgically and medically forcing intersex people into a binary sex without consent.

New comment by nyanpasu64 in "Estrogen: A Trip Report"

nyanpasu64 — Thu, 19 Jun 2025 21:28:22 +0000

It's chilling watching the latest political powers openly declare that trans people are not who they are inside and must never be allowed to become what they are inside, while eliminating legal recognition and protection and criminalizing life-saving transition healthcare. I find myself retreating into dissociation because to feel the horrors is more than I can bear.

New comment by nyanpasu64 in "New US visa rules will force foreign students to unlock social media profiles"

nyanpasu64 — Thu, 19 Jun 2025 00:03:41 +0000

Why do half of your comments (most of the ones in uppercase) sound like they're written by AI?

New comment by nyanpasu64 in "Game Hacking – Valve Anti-Cheat (VAC)"

nyanpasu64 — Wed, 18 Jun 2025 22:01:31 +0000

Reminded of the Super Pichu story where someone modded his ISO of Melee to increase Pichu's stats during a Melee tournament.

New comment by nyanpasu64 in "The unreasonable effectiveness of fuzzing for porting programs"

nyanpasu64 — Wed, 18 Jun 2025 17:44:25 +0000

> Most code doesn't express subtle logic paths. If I test if a million inputs are correctly sorted, I've probably implemented the sorter correctly.

I don't know if this was referring to Zopfli's sorter or sorting in general, but I have heard of a subtle sorting bug in Timsort: https://web.archive.org/web/20150316113638/http://envisage-p...

New comment by nyanpasu64 in "The hamburger-menu icon today: Is it recognizable?"

nyanpasu64 — Tue, 17 Jun 2025 21:39:43 +0000

In Firefox if you right-click the title bar and "Customize Toolbar..." you can check Title Bar.

New comment by nyanpasu64 in "Why JPEGs still rule the web (2024)"

nyanpasu64 — Tue, 17 Jun 2025 21:10:49 +0000

My working model is that WebP images are generally a lossy copy of a PNG or a generation-loss transcoding of a JPG image. I know that lossless WebP technically exists but nobody uses it when they're trying to save bandwidth at the cost of the user.

New comment by nyanpasu64 in "Modifying an HDMI dummy plug's EDID using a Raspberry Pi"

nyanpasu64 — Tue, 17 Jun 2025 04:16:26 +0000

A friend had to reflash a monitor (Acer K222HQL) with a corrupted EDID over the HDMI port. I confirmed that it has three input ports (VGA, DVI, and HDMI) each with their own EEPROM chip next to the port (the friend had to lift a pin on the HDMI EEPROM to successfully reflash it; she should've connected it to ground but didn't). I found a manual online (https://global-download.acer.com/GDFiles/Document/User%20Man...) saying that the monitor supports DDC, implying it does do the multi-peripheral I2C trick.

I have another broken monitor's mainboard where the VGA and DVI's EDID pins go through 100 ohm resistors to {unpopulated 8-pin footprints, as well as the main chip}. I think this means the design considered saving EDID on dedicated EEPROM chips, but ended up integrating the data on the display receiver instead.

New comment by nyanpasu64 in "Modifying an HDMI dummy plug's EDID using a Raspberry Pi"

nyanpasu64 — Mon, 16 Jun 2025 01:04:48 +0000

You can override EDID in the kernel options (https://foosel.net/til/how-to-override-the-edid-data-of-a-mo...), but I don't know if you want to add a virtual monitor (unsure if https://askubuntu.com/questions/453109/add-fake-display-when... works).

New comment by nyanpasu64 in "Modifying an HDMI dummy plug's EDID using a Raspberry Pi"

nyanpasu64 — Mon, 16 Jun 2025 01:02:38 +0000

Do any monitors use the I2C multi-peripheral feature to allow both DDC communication and an I2C EEPROM to exist at different addresses on the same bus? Or is it cheaper to integrate functionality into a controller chip? (Though DP tunnels EDID over the aux bus, and (I assume) doesn't use an EEPROM to begin with.)