Am Sa 15. November 2008 schrieb [EMAIL PROTECTED]: > Hello, I've the same issue as described here: > http://wiki.openmoko.org/wiki/Neo_FreeRunner_Hardware_Issues#Known.2FAccepted_Issues > That is to say the "Poor low-frequency audio response with low-impedance > headphones" problem... > On IRC I was told that was the fault of a capacitor that lies between the > audio chip and the headphones jack that is too low and act like a > high-pass filter and so removes the bass... > > This issue is very problematic for me: > I've a pma430 that I use like an audio player(linux device with > proprietary kernel modules and an old proprietary version of qtopia)...but > it's an old device...and one day the battery will die... > Moreover it has a lot of bugs that I can't get rid of: > *mplayer for the pma430 is buggy and I don't have its sources(it's a > special port because the sound drivers are buggy or specials...) > *the default player is buggy and I often have to restart the device > *the suspend button is often pressed when the device is in my pocket...and > because of the proprietary nature of the device I don't think this could > be changed...otherwise the openpma devellopers would have changed that... > So buying an openmoko I thought that I would get a device that would > replace it as: > *a real GNU/Linux pda(done(the compiler of the pma430 couldn't be changed > because of a kernel bug and the kernel couldn't be changed because of the > proprietary modules,but with openmoko we have openembedded and a lot of > software)) > *an audio player(here's the problem) > > The problem is that the software fix suggested by the wiki isn't > sufficient for proper audio quality... > > So what are my options? > solder myself the capacitor isn't an option...I'm not skilled enough nor > have the right soldering iron(Long time ago I've broken a graphic card > trying to do a mod that would make the nvidia drivers recognize the card > as a quadro card...(the card was sometimes recognized by the 3d driver and > sometimes not)) > So what sould I do? > find a shop or someone that would do it for me(I live in Milan in Italy)? > use the guarantee(I bought it at bearstech)? > Or would a better software fix be possible(such as re-encoding the ogg > with special filters?,but that would be problematic as it would use a lot > of space for keeping the files on my computer...but if it's the only > option I'll use it) > adding an external sound card isn't an option either because if I use it > in my home on a hifi-set I would not be able to feed the openmoko in > power(as the usb port would be taken by the audio card) or if I use it > outside...a sound card isn't very compact... > By the way for determining the version of my hardware, I think I've got > the hardware fix for the GPS and I bought a released version of the GTA02 > Thanks a lot in advance for your help.
Sorry the audio is definitively broken due to the capacitor issue you're mentioning. There is no sw-fix either. You may get (semi)decent audio by: o- using a home-stereo line in, which has >1k input impedance o- using high impedance headphone (>600 Ohm) o- do a rework on the capacitors (there are different ways to do that, all need excellent soldering skills) o- use a bt-headset very sorry I didn't achieve to fix this for MP yet cheers jOERG
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