Can someone please explain, how such an adapter had to look like (maybe a circuit diagram), because I'd like to build one. I think in most cases, people will use an adapter from the 2.5mm to a 3.5mm jack anyway. Will the audio quality be equal with an adapter to the hw fix? If not, is there a description of a hw fix for it (Joerg, you say there are different ways, so i assume you have already done or at least designed one)?
Sincerely, zerghase Joerg Reisenweber wrote: > > Yes, sounds like a good idea (input impedance should be (much) > [>] > 1000Ohm > though, not <1k) > This adapter also could implement some hw-equalization for the > highpass-filter > created by the 1uF*(1/(1/1k + 1/(33R + adapter-impedance)). (where, in > sequence, values are from: C4111:1u, R4117:1k, R4407:33R. Right channel > analogue) > > Requests for assistance welcome. > cheers > jOERG > > Am So 16. November 2008 schrieb Scott Carlson: >> Would also be possible to create a small inline adapter for head set that >> have <1k input impedance? It may be convenient to make a batch and sell >> them >> cheap? (As a non-intrusive) hw fix.? >> >> SCarlson >> >> >> > >> > 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 >> > >> > _______________________________________________ >> > hardware mailing list >> > [email protected] >> > http://lists.openmoko.org/mailman/listinfo/hardware >> > >> > >> > > > > > _______________________________________________ > hardware mailing list > [email protected] > http://lists.openmoko.org/mailman/listinfo/hardware > > -- View this message in context: http://n2.nabble.com/-sound-%3A-capacitor-that-act-like-a-high-pass-filter-and-so-removes--the-bass-on-the-headphones-jack-tp1502610p1580702.html Sent from the Openmoko Hardware mailing list archive at Nabble.com. _______________________________________________ hardware mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/hardware
