Support and General Use > Hardware
X5-30gb -- no audio on Line Out jack
Llorean:
You've said this a few times. I've taken this into account.
Now consider - the DAC could be damaged and not driving the line out possibly, but electrical interference can still be heard through it.
There are possibilities other than the one that you seem to focus on. And remember, you yourself verified that it wasn't the firmware by switching out firmwares.
hollowman:
--- Quote from: Llorean on April 29, 2010, 05:24:39 PM ---Now consider - the DAC could be damaged and not driving the line out possibly, but electrical interference can still be heard through it.
--- End quote ---
Rubbish! Go back and carefully re-read thru this thread. Phones out produces HQ sound.
--- Quote ---There are possibilities other than the one that you seem to focus on. And remember, you yourself verified that it wasn't the firmware by switching out firmwares.
--- End quote ---
I agree and I think I've already said it. I fault the X5 or other acts of Nature (incl. something I may have inadvertingly done).
That said, and WADR, several of you responders seem to be going out of the way to protect RB rather than truly problem-solve this issue. Let's try to think ... ahem ... out of the Box!
Llorean:
--- Quote from: hollowman on April 29, 2010, 05:48:44 PM ---
--- Quote from: Llorean on April 29, 2010, 05:24:39 PM ---Now consider - the DAC could be damaged and not driving the line out possibly, but electrical interference can still be heard through it.
--- End quote ---
Rubbish! Go back and carefully re-read thru this thread. Phones out produces HQ sound.
--- End quote ---
And the fact that headphones out works proves what exactly in your mind? I was aware of this too, which is why I specifically said line out.
--- Quote ---That said, and WADR, several of you responders seem to be going out of the way to protect RB rather than truly problem-solve this issue. Let's try to think ... ahem ... out of the Box!
--- End quote ---
No, we're trying to convince you it's not likely to be a firmware issue since as of 12 hours ago you were still harping on about it being a firmware issue, so that you can go about trying to investigate the real cause, and as of two posts ago you were claiming that it *wasn't* hardware.
We can't help you "solve" a problem until it's identified. And you keep coming back around to trying to claim it's a firmware issue even though you've ruled it out.
If it's a hardware issue, you need to fix or replace the hardware that's damaged. If you still think it's a firmware issue, provide some evidence (such as a firmware version that works alongside a firmware version that doesn't while using the same hardware, not two different players of the same type).
hollowman:
--- Quote from: Llorean on April 29, 2010, 05:54:45 PM --- And you keep coming back around to trying to claim it's a firmware issue even though you've ruled it out.
--- End quote ---
But what exactly is firmware -- surely, low-level stuff is stuff that RB does not normally touch, but may have been accidentally affected during the orig. FW flash.
--- Quote ---If it's a hardware issue, you need to fix or replace the hardware that's damaged. If you still think it's a firmware issue, provide some evidence (such as a firmware version that works alongside a firmware version that doesn't while using the same hardware, not two different players of the same type).
--- End quote ---
Define "hardware issue", please. IMO, that's a pretty generic def. that'll get one out of an unexamining courtroom. But since you brought it up...
I've been, since the beg., going through the HW datasheets on this page...
http://www.rockbox.org/wiki/IaudioX5HardwareComponents
...notably the TI DAC. It's working normally AFAICS, but I don't know what may be causing it mute LO ... or something else between the TI chip and the LO jack (I assume there is nothing, like a buffer or switch).
soap:
Let's assume there is low-level stuff Rockbox doesn't touch, and it is here the problem lies.
A - Why are we talking about it on the Rockbox forum?
B - Why didn't reinstalling the Cowon firmware fix it?
I don't know why you linked to the datasheet or what that proves. The line-out and headphone-out are separate circuits on the TI DAC (as shown in the datasheet).
You keep using the word "mute" with no supporting evidence. I'm not trying to nit-pick words, but I believe that poor word choice can lead to poor logic and poor conclusions.
The fact you are able to pick up electrical interference when plugged into the line-out in no way signifies a working, yet muted, line-out circuit. It could be a symptom of that, but it could also be a symptom of a non-working line-out.
My beef is it appears to me a conclusion was reached and the some of the evidence is being held up in support of that conclusion, while ignoring the other (and I feel overwhelming) evidence to the contrary.
Fact: You installed Rockbox.
Fact: Line Out does not work now (I assume the line out was proved working immediately prior to the install.) At best this is correlation.
Fact: You can hear what sounds like electrical interference on the line out now.
Theory: Rockbox broke line-out
Evidence For: Correlation.
Evidence against: Reinstall of Cowon firmware does not restore line out.
Evidence against: Nobody else amongst the hundreds if not thousands of people with the same hardware has reported the problem.
Evidence against: Rockbox audio code for the iAudio players has not changed in 10 months IIRC.
Evidence against: The really low-level setup is done by the Cowon bootloader IIUC, which we use to launch our bootloader.
--- Quote from: hollowman on April 29, 2010, 05:48:44 PM ---
--- Quote from: Llorean on April 29, 2010, 05:24:39 PM ---Now consider - the DAC could be damaged and not driving the line out possibly, but electrical interference can still be heard through it.
--- End quote ---
Rubbish! Go back and carefully re-read thru this thread. Phones out produces HQ sound.
--- End quote ---
As I say, this proves nothing. Separate circuits.
EDIT: Not as separate as I thought. See page 9 of the datasheet. I see no way to mute the line-out inside the DAC itself without muting the headphone out
--- Quote from: hollowman on April 29, 2010, 05:48:44 PM ---I agree and I think I've already said it. I fault the X5 or other acts of Nature (incl. something I may have inadvertingly done).
That said, and WADR, several of you responders seem to be going out of the way to protect RB rather than truly problem-solve this issue. Let's try to think ... ahem ... out of the Box!
--- End quote ---
I resent what I see as a misportrayal of the situation.
My challenging assumptions of yours is hardly defensive behavior on my part.
If you want problem solving - let's start with sound reasoning.
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