Rockbox Development > Feature Ideas

line-level output for Sansa e200

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torne:
There should be no noticable/measurable effect on battery life from setting the volume to 0dB, by the way. The power consumed by the amplifier on a portable player is miniscule compared to the rest of the device.

saratoga:

--- Quote from: mc2739 on August 13, 2010, 07:23:35 AM ---The line out on the e200v1 appears to be connected directly to the headphone output.  Adjusting the AS3514 line out level has no effect on the line out volume.  The line out level can only be changed by adjusting the headphone volume.

Adjusting the headphone level automatically could be dangerous in the case where someone is listening through the headphones and connects their dock/charger for the purpose of charging the battery.  The headphone level would be switched to 0db which could potentially cause hearing damage.


--- End quote ---

So it would need to work like on the Fuzev2 where it mutes the HP and maxes the line out?

soap:

--- Quote from: PickupBetty on August 12, 2010, 11:46:54 PM ---I'd prefer not to crank up my volume -- it's a waste of battery <snip>

--- End quote ---
I rather doubt that.  Without headphones connected there is no power being transferred.

mc2739:

--- Quote from: saratoga on August 13, 2010, 04:29:43 PM ---So it would need to work like on the Fuzev2 where it mutes the HP and maxes the line out?

--- End quote ---

It cannot work like the Fuzev2.  The Fuzev2 has a single DAC which is switched to two outputs (headphone & line out).  The e200v1 has two DACs, each with their own outputs, but instead of line out using it's own DAC, it is connected to the headphone DAC.  The line out DAC is unused.

When you adjust the level of the line out DAC, the line out connection stays at the same volume level.  When you adjust the level of the headphone DAC, the volume  level of both the headphones and the line out connection change.

PickupBetty:
Thanks for the discussion, everyone.  I can rest easy, now that I know it's a matter of "can't" instead of "won't."  Somehow the irritation doesn't exists anymore.

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