Line out volume

[Suntiger]

Quick question, and sorry to the mods and Llorean if this is the wrong forum (Haven't been here in a while, and from reading the stickies this looks like the best one):

On the iPod 5G, is it possible to adjust the volume of the line out port in the Dock connector? My headphone port has become monophonic due to age, so I got a SiK Din dock -> headphone adapter to fix that problem. I'm unable to adjust the volume though; adjusting volume in Rockbox does nothing since that only affects the headphone port. Line level is often too loud for my tastes, and sometimes too soft, so I'd love to be able to adjust the line volume instead of having to buy a headphone amp. (Moreover, I'm not sure a headphone amp would allow me to lower the volume...)

Anyone know how to do this?

Thanks!

[Llorean]

You can buy a cheap inline volume adjuster somewhere like Radioshack for less than $8. That will only let you decrease it, though.

Another solution is that in the code the line out is locked at 0dB, but on the iPods it can actually be adjusted. I don't know where to do this at in the source, but early on the line-out volume was adjusted by the volume control as well, but since it was supposed to be a line out, we opted to have it work in a more line-out like fashion, and stay at the line level (as well the original firmware does this, or so I hear).

[Suntiger]

It would be pretty awesome if someone knew how to patch the source so that it worked the old way....

[bk]

Your other option is to open your ipod and gently adjust the headphone jack so that the connectors make contact again. This should make your headphone jack work in stereo.

[Genre9mp3]

It would be pretty awesome if someone knew how to patch the source so that it worked the old way....

I think this is the commit you have to revert:

22 Mar 13:04
Thom Johansen
Fixed line out volume for 4G, Nano and 5G Ipods. Partial patch #4814 by Ralf Herz.

In other words, delete the green lines from these files in the source:

firmware/drivers/wm8758.c
firmware/drivers/wm8975.c
firmware/export/wm8758.h
firmware/export/wm8975.h
firmware/sound.c

Then create a patch so you can apply it again whenever you need to in the future, and compile your own build.