Support and General Use > Audio Playback, Database and Playlists

Strange artifacts in mp3

<< < (2/3) > >>

maraz:
So what you're saying is basically that we shouldn't investigate this particular cause at all because everything works on one device despite applied heat?

What if some 60% of Nanos display the heat problem while 40% work well? Should the development of Rockbox be stopped for those 60%, as they would be forced to use the last revision that used 75MHz clock?

Llorean:
If 40% don't show the heat problem, then heat isn't the cause of the problem, it just draws out the symptoms, and there's still a very real chance we can actually identify what the problem is, rather than what makes the problem more visible.

We already have non-working iPods, and we *know* that 80mhz is a valid speed for the processor, so if hot environments are the problem, or if they're not, then we're not utilizing some other chip right. Rather than turning the processor down from 80mhz, we should be identifying what chip we're using wrong because whether or not hot environments are related, it's clear they don't *cause* the problem, just *highlight* it, and therefor investigation should be toward what actually causes it.

Tri Nguyen:
I'm from Vietnam, and the tempature is usually above 30C here, and I haven't seen your symptoms during summer (sometimes the tempature raise to 35C). So I think the problem isn't because of the heat.

maraz:

--- Quote from: Llorean on August 27, 2007, 11:51:13 AM ---We already have non-working iPods, and we *know* that 80mhz is a valid speed for the processor
--- End quote ---

Point taken.


--- Quote from: Llorean on August 27, 2007, 11:51:13 AM ---we should be identifying what chip we're using wrong
--- End quote ---

This would probably be the i/o chip, since at least I've had problems during USB access. Someone with more knowledge about the data paths of the Nano could probably tell more.

Llorean:
You're the only person who's experienced problems during USB access, and USB is not in any way controlled by Rockbox, so if the problem does relate to USB access, it's a hardware flaw and nothing we can fix.

We reboot into Apple software for all USB operations.

That information actually suggests that you're a unique case, as I don't believe anyone else has reported USB troubles.

Either way, as I've said somewhere, though I can't remember where, the current theory is that it's a timing issue accessing the flash. But again, this wouldn't affect USB since our software isn't running, and hasn't done any hardware init for that mode.

Navigation

[0] Message Index

[#] Next page

[*] Previous page