Volume when attached to car

[HorchataKing]

I have the 30GB iPod Video with the latest build on it.  The problem I have is that when I connect the player to my cars ipod adapter the volume on the ipod is so low i can not hear it without turning the radio all the way up.  The volume on the ipod is turned all the way up and every setting I have found hasnt helped. Does anyone have an insight or advice on how to solve this.

[saratoga]

The connector on your car is probably a line in jack.  If you use a headphone out jack, the volume may or may not match.  The best thing to do would be to get a line out adapter for your ipod.

[soap]

Assuming no DSP, set your iPod's volume to "0".

[dreamlayers]

The Video iPod is capable of outputting a reasonable level to line in.  If you're having some problem, maybe it's due to your iPod adapter.   

A few things you could try:  connecting another source (if possible), connecting the iPod to another line in (eg. your computer) and using the same iPod with the Apple firmware. 

[HorchataKing]

Apple firmware produces normal volume levels, other ipods have no problems (given they are all apple firmware), the ipod adapter in my truck attaches to the ipod dock connector.

[Chronon]

The amplitude depends, among other things, upon the difference in impedance.  Mismatch of impedance can ruin an otherwise suitable source.

[soap]

The impedance is not an issue if it works with Apple firmware but not our firmware.

HorchataKing - Do you use the EQ?  Replaygain?  Rockbox should and did output through the dock connector at line level - the exact same level as the Apple firmware.

But you're saying you do hear the audio, just quietly, HorchataKing?

For laughs and giggles turn on and off the accessory power option - though I don't think this is it.

I'm nowhere near my dock-to-lineout dongle - could someone else test if something recently broke dock lineout @ 0db?


EDIT:  HorchataKing - I was putting the cart before the horse.  We need to verify hardware functionality:

You didn't explicitly mention using THIS iPod with the original firmware, you mentioned "other ipods" having no problems.  You need to verify that THIS iPod when using Apple firmware does not exhibit the same problem.

[Chronon]

The impedance is not an issue if it works with Apple firmware but not our firmware.

True.  I missed that bit.   

[HorchataKing]

This ipod that currently has rockbox worked previously with Apple firmware with no problems. I only hear the music quietly if I have the volume on the radio deck maxed out then I get more of that annoying hum sound than music. tried the accessory power - nothing happened, Radio deck EQ is set to boost the ipod line level in 12db.

[soap]

This ipod that currently has rockbox worked previously with Apple firmware with no problems. I only hear the music quietly if I have the volume on the radio deck maxed out then I get more of that annoying hum sound than music. tried the accessory power - nothing happened, Radio deck EQ is set to boost the ipod line level in 12db.

Cool, half way there.
1 - verify that Apple firmware works currently with your head-unit.
2 - If it does reset all Rockbox settings by switching the hold switch to the on (red) position as soon as you see the Rockbox logo.  You should see a "cleared" dialog if this works correctly.

[HorchataKing]

Tried both used current Apple firmware and it worked fine. Reset Rockbox settings before trying Apple firmware and it didn't work.

[dreamlayers]

My 30GB 5G Video iPod currently has version r18760-081010 installed.  If I record to line in on my motherboard using a cable from the dock connector, the line out level is comparable to headphone jack level with the volume set to 0.  Enabling or disabling accessory power has no effect.