Freerunner audio channels

Alexander Shulgin alex.shulgin at
Mon Aug 10 13:04:27 CEST 2009

On Sat, Aug 8, 2009 at 14:05, Paul Fertser<fercerpav at> wrote:
> David Fokkema <dfokkema at> writes:
>> The fact that Freerunners differ in audio quality and settings has been
>> stated on this list and on support. And going by the last paragraph,
>> this is true.
>> So, _why_ are Freerunners different?
> One of the problems is that some freerunner revisions are in fact
> different in hardware. Most devices have 1uF capacitors instead of
> R3004/R3005 (which should be 0R), and that's not a joke. That is
> earpiece path and not surprisingly that devices that have those
> capacitors have considerably lower sound volume from the earpiece.

And what do I do if I happen to have one?

On my FR any sound from earpiece is so low that it could be barely
heard even in noise-free environment.

I use android with TonePicker's settings tuned to maximum + patched
asound.conf (mono playback volume in earpiece section), but still it's
_not_ usable as a phone. :(

I admit I didn't do extensive testing, but other people seem to have
no real trouble with the volume, so I suspect more and more that the
hardware itself is buggy...


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