Rockbox Development > Feature Ideas

Options for Line Out

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djrichwoods:
I'm using an Iriver H320.

I've noticed that not only does the Line Out signal respond to the volume control, it also responds to the EQ and Bass/Treble controls.

Would it be possible to make the Line Out jack a true line level output jack that isn't affected by the volume controls, EQ or Bass/Treble controls?  My problem is that I tweak the sound to make my Etynomic ER-6i earphones sound amazing but when I want to play my player over my stereo I have to disable the EQ and pull down the bass level (the bass control provides a much warmer bass response than the EQ control for some reason so that's what I use) as my system doesn't need that.

If the Line Out jack were independent of those controls (or at least given an option to make them independent in the menus) then that would make the transfer between earphones and home sound system seamless.

I know that not all targets have a Line Out so perhaps a menu option isn't an option but it seems redundant to have the Line Out jack act like a 2nd headphone jack.

Thanks.

Llorean:
If a line out can be as you described (independent of volume and hardware tone controls) it is. The EQ is a software tone control anyway.

But just save a .cfg file for "Headphones" and one for "Stereo" and swap between the two. It shouldn't take you long. Your request, though, is impossible for this player and pretty much already true on the players where it's possible.

Multiplex:
For once I'm not sure that Llorean was his usual crystal clear self...

The this is partly a limitation of the iRiver H300 series (and the H100 analogue output) Hardware. The chip that drives the Headphone and Line out applies the volume setting and tone control to the line out as well as the headphone output.

On some other players (no, sorry I don't know which) the Line Out is extracted after the D to A and before the tone and volume controls. Not all players have the hardware tone controls.

The way Rockbox is currently architected the Equealiser is always applied - even to the digital optical output on the H100 (and I think there is another player with a digital output).

That's a lot more detail but it may not be any clearer.

oayz:
Just want to use this opportunity and pitch my idea again:

have 2 automatically selected CFGs: one for battery operation, another for external charger

Llorean:
That is kinda unrelated to this task. Assuming power connected is the same as a desire to use line out is a bad assumption.

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