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disabling gain in ipod video line out? please help.

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reyrios:
I have been using rockbox for more than 3 years now, and I just realized that I can actually turn up and down the volume of the ipod while connected with a LOD in the line out (bottom fo the player), when did this happen? I dont want this? I need a fixed line out, I always use my ipod with an amp o connected to a dock, it is not my player because in apple mode, the line out is still fix and there is no volume control, any help will be great.

saratoga:

--- Quote from: reyrios on February 21, 2010, 02:18:07 AM ---I have been using rockbox for more than 3 years now, and I just realized that I can actually turn up and down the volume of the ipod while connected with a LOD in the line out (bottom fo the player), when did this happen?

--- End quote ---

Apparently it came along with the recent change allowing wider volume control range on the video.  In order to get to the lowest volumes the DAC has to adjust a setting that reduces the voltage out of the entire DAC.  As I understand it, you can either:

1)  Keep volume above -58dB (IIRC) in which case the line out stays at line level
2)  Revert r24318 in your local build : http://svn.rockbox.org/viewvc.cgi?view=rev&revision=24318

Presumably #1 is your best bet, since if you listen at the same volume you did before you'll still get line out level.

Buschel:
I have submitted a change (r24318) to allow volume control down to -90 dB for the iPod Video. If you lower the volume below -56 dB the lineout will be affected as well. Above -56 dB there is no effect at all.
Can you please check whether this is the effect you are talking about? If not, can you please check whether the effect you are talking about came in with r24318?

reyrios:
How can I revert r24318?

saratoga:

--- Quote from: reyrios on February 21, 2010, 08:35:00 PM ---How can I revert r24318?

--- End quote ---

Remove the changes to the source code I linked and then compile your own build from the modified source.  If you're not used to SVN, doing it by hand is probably quickest. 

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