Hacking PSA - WII2HDMI Portholic Audio Problems (my solution)

[livin]

Hey everyone,

I had a problem with my WII2HDMI Adapter from Portholic. Its a great adapter and the quality of image is superb. Even component cant compare (I have wii component and they are good, but hdmi is way better still).

The only problem was that Audio sucked in some instances.
A reproduceable example is GC Twilight Princess, whenever you Warp. The audio crackles and distorts every time.

A solution is to insert headphones into the audio cinch 3.5mm of the portholic WII2HDMI port.
The HDMI sounds gets more quiet, but you can just turn up the volume on the TV. The audio doesnt crackle anymore.

Now instead of always having a pair of headphones behind my WII, I took a 3.5mm cinch end piece and connected 22ohm (2x) resistors to it.
Normal phone headphones are between 20-40ohm resistance, so that is about the same.
It works well. I added a picture if anyone is interested what I did.

Hope that helps others that are in a similiar situation. The audio crackling in Gamecube games was super annoying.

 

[SkeletonSmith]

This should be in the Wii U - Hardware and Modding

 

[N7Kopper]

This should be in the Wii U - Hardware and Modding

Probably in the Wii section actually. A Wii U user would just use the native HDMI.

 

[livin]

Damn I misread.
Dear Mods: I'd appreciate a move to the WII forum.

 

[fatpan]

Thank you for the fix solution! I was scratching my head on this one thinking it was a PAL/NTSC conflict on my homebrew. Just popped in some old headphones in there and worked. I wish I could do a cleaner solution like yours, maybe one day I will look into your h/w mod

 

[geodeo]

Hello, thank you for your solution, if anybody gets wandering around in 2026 I got with another but a little more messy "solution" If you don't want to loose volume with the headphones, just add a two 10kOhm resistors between sound inputs on the Wii connector and the capacitors 18 & 19 (prior you need to cut the traces so the resistors connect in series, one by channel), this is roughly a voltage divider that attenuates the "volume" from the Wii Output and so the IC on the Wii2HDMI can handle it better and "cracking" on high pitch sounds gets eliminated completely without loosing volume level. In my adapter (attached photos) just used a couple "jumper" traces that runs bellow the circuit board, used an exacto blade to trim those traces and added the resistors (I'm not an expert on soldering nor writing on English, sorry). Grettings and happy New Year.