Database Users

XDA II audio out pins

I got no response in the stocking up for it forum so ill try here...
Hopefully you guys are a bit more clued up...
I have switched from XDA to XDA II
On the XDA the audio out pins (3 + 4) used provide audio out all the time.
This was great for mp3 playing and sat nav instructions but no so good if you wanted to wire to stereo and use the radio mute function of the stereo.
On the XDA II the same pins now seem to only provide audio out during a call. not even the ring tone is transmitted out - it only cuts in when the call is answered.
Does anyone know of a way of making the XDA II behave like the XDA in this matter and provide all audio out all the time.
I dont mind if its a piece of software, a registry hack or a pin I need to short or anything.
I just want to be able to return to having my sat nav instructions and mp3 files play through the speakers.
I use TomTom Navigator 2...
Thanks in advance for any help...

i hade the same problem
i figured out i had to + or - something to a pin
i cant remember just now wich one
problem then was, you need a preamped mic in singal for talking cause internal mic is disabled

Where did you get your info from so i can go looking...

Did you try grounding 19 (CAR_ON#) like it says on http://wiki.xda-developers.com/wiki/Connectors ?
"When this pin is connected to ground, the internal mike and speaker are turned off, and audio input is taken from the audio input pin on the connector, for use in real car kits."
Haven't tried it myself...
Jamie

i believe that the XDA car kit does this...
but the xda behaves differently than the xda ii
the xda is audio on all the time and the xda ii is audio only during a call

Im looking into this at the mo. My idea is a cable from the XDA2 to a box, the box will have a 3.5mm socket with audio out to the car stereo (audio from phone and mp3 playback etc), 3.5mm for an external mic input. 5v power out to charge/supply the XDA2, power out and data link to garmin eTex GPS. The data side is easy to do. i just need to run the testes on the audio side.
Pete

TDIPower said:
Im looking into this at the mo. My idea is a cable from the XDA2 to a box, the box will have a 3.5mm socket with audio out to the car stereo (audio from phone and mp3 playback etc), 3.5mm for an external mic input. 5v power out to charge/supply the XDA2, power out and data link to garmin eTex GPS. The data side is easy to do. i just need to run the testes on the audio side.
Pete
Click to expand...
Click to collapse
Hi! Is your TDI the PD? Would you be able to hear something?

I just can't believe it is not described here!
XDA-Developers seem to be a very competent and sophisticated site dedicated to XDA1+2. How it is possible that description of XDA2's four-pin 2.5mm jack isn't described here (including those two buttons)?

Arkobad said:
I just can't believe it is not described here!
XDA-Developers seem to be a very competent and sophisticated site dedicated to XDA1+2. How it is possible that description of XDA2's four-pin 2.5mm jack isn't described here (including those two buttons)?
Click to expand...
Click to collapse
Because we simply haven't yet taken the litlle XDA2 thingy apart. (I have been meaning to for the longest time, but simply haven't gotten around to it.)

XDA II for Car Audio

Hey,
I have a question regarding the XDA II.
When I'm getting the device I would like to get it connected in my car.
Is it possible to connect the XDA II to an amplifier and play my mp3's?
I know there are a few amplifiers out there that can be connected with a "walkman" jack.
If is possible could you put some pics online where I can check it out?
Thanks a lot!
Cheers
Panja

if you dont want to get a car tuner which neat jackconnectors
and you have a tape player in the car then
http://www.digitalnetworksna.com/shop/_templates/item_accessories.asp?model=69&cat=16
this one or one like it would work if you made or got a xda 2.5 to 3.5 converter

First of all: thanks for the amazing fast reply!! :-D
I don't have a tape player in my car... So this is not an option for me...
I can buy an amplifier that can be connected with a "walkman" jack.
I had one a long time ago, I connected my walkman to the amplifier.
So is there a cable that can be connected to the XDA II and the other side that has a "walkman" jack? (So I can put this in the amplifier)?
And will this work for the XDA II?
Cheers

http://www.expansys.com/product.asp?code=PPCPADPT01
xda1 and 2 have compatible connectors apart from the pickup phone buttons

w00t!!
That's what I'm looking for man!
Thanks again, going to order that one as soon as my XDA II is in my hands :-D

Does anyone in here own such a cable?
Just want to know if the quality is any good...
If it's worth the money.
The cable itself is not that expensive but I would have to buy an amplifier too.
Don't care about the money as long as it works great :-D
Cheers

Also I would like to know when connected with the cable does the microfone still work? (so when the cable is inserted)
Because I will be using MS Voice software...
Thanks

if it does disable the mic in the xda then this
http://pc-mobile.net/pxdaa.htm
would work it have a mic aswell and a 3.5mm connector
of cause then you would have to place it in a place where
it can recieve your voice
about sound quality then should not be much worse then the headset
it's just another connector with the jack 3.5mm
it's just analog you can compare it with how much the quality loss would be if a walkmen were connected the same way compared to connected to a headset

Thanks man!!
Just a question regarding the cable with mic.
If I will use it in the car with the sound (mp3) over my speakers won't that interfere with my microphone (with ms voice software)...?

Hi just thought this idea might help:
if you have a look around the net (i think Expansys.co.uk also do one) you can get a little radio module that plugs into a standard stereo jack, it transmits your audio to a special frequency that can be picked up by any FM radio nearby. Like you car radio if you have one.

I use my XDA II as an MP3 player in my car via Seidio's iSound wireless FM transmitter. The transmitter input plugs into the XDA2's headphone jack (I have a 2.5 to 3.5 mm adaptor) and then I tune my car stereo into the user definable frequency of the iSound transmitter. Works very well.
http://www.seidioonline.com/ProductDetails.asp?ProductCode=SFTF1

This sounds very very interesting guys!!
Thanks a lot.
This is a lot more userfriendly than putting an amplifer and stuff in.
I have a nice car audio so this is very neat!!
How is the sound quality?!
Cheers

So how is the sound quality?
Before I'm buying this one I would like to know if the sound quality is good.

I got the expansys adapter but it works very poorly for the XDAII dues to the unusual shape of the 2.5 socket on the XDAII. I have to fiddle with the plug to get it to work... very annoying.
Anyone found an adapter without this problem?

josephwaller said:
I got the expansys adapter but it works very poorly for the XDAII dues to the unusual shape of the 2.5 socket on the XDAII. I have to fiddle with the plug to get it to work... very annoying.
Anyone found an adapter without this problem?
Click to expand...
Click to collapse
Yes, with another adapter i had the same problem.
Buy on old Nokia 8110 headet, cut it below the mic and use the wires to solder a 3,5mm connector to it, On the nokia wire :
blue = Audio-L
Green = Audio-R
Red = Mic
Blanc = Ground
Good luck !

Audio (MP3) through original Dockingstation. HELP!

Hi,
I'm only 13 and a proud owner of an O2 XDA 2.
This I what I need help with.
I would like to place my USB docking station on top of my subwoofer, and connect my XDA with it (only for audio purposes only).
I've read some of the forums here, but didn't find much info. :?
Could someone tell me which pins, on the connector, on the dockingstation send the sound? I would like to add 2 cinch cables to these pins, and attach them to my subwoofer (to kind of make my XDA like an Ipod or another MP3 player, where I simply stick it into my dockingstation and start playing MP3s through my sound system).
Thanks,
Kind Regards,
Tony Schattat

Hi mate.
Note sure you could connect the XDA directly to a speaker as I doubt it would have the required power output (but I don't know much about this, just being logical).
Take a look at the following thread: http://forum.xda-developers.com/viewtopic.php?t=26489&highlight=
This guy has basically modified the headset to have a 3.5mm jack - I've then suggested (and intend on doing this) that you could put 2 standard audio outputs instead.
On reflection though, I think his suggestion may be better as it reduces the number of leads. If you then needed to split the sound out to 2 seperate channels you could use something like this:
http://www.maplin.co.uk/Module.aspx?ModuleNo=43086&doy=3m9
Cheers
Wayne

Hi Wayne,
Thanks for your reply.
I would rather like to have a solution which is built in my dockingstation.
With alot of precision I was able to do the following.
1. Used http://wiki.xda-developers.com/wiki/Connectors for details.
2. On pin 19 on the dockingstation I placed a 10K SMD resistor (as the standard ones are too big), connected to GND, as stated in the text.
3. Using a double cinch cable I soldered them onto pins 3 (CAR_AUDIO_R) and 4 (CAR_AUDIO_L), and both GND wires to GND.
But nothing seems to work.
I used the ohm-metre to check if the 10K resistance even came up to pin 19 of the dockingstation. I does. Unfortunately the XDA doesn't turn off it's built-in speaker and microphone, as stated in the text.
This basically simulates a car-kit for the XDA, doesn't it?
Kind regards,
Tony Schattat

Audio playback
Hiya!
Well if yer are 13 then it seems UK Schools are way behind German ones if they're teaching you about using Ohm Meters, Resistors and electronic theory already!
Ok, overall to me this whole precision soldering and resistor checking etc is all overkill for what you ultimately seem to want to achieve.
I've just bought off eBay the little 2.5 mm to 3.5mm standard headphone jack converter lead for about £2.50. I'm going to go nip into a shop or again off eBay and get a 3.5mm stereo to 2 phono plug convertor lead.
Simple case of then slapping that into the Aux input of my Hi-Fi amplifier, or my mini deck hifi etc and playing the mp3's through that!
No need for faffing around with soldering irons, and electronic theory and all that!
Added benefit is of course that through the hifi unit, I have full control over the audio equaliser functions and so will have the full spectrum of audio frequencies to hear the music - Your requirements states you just want to connect it to a subwoofer. Low frequencies are great, but you do need the upper frequencies too!
That will all set you back the grand total of about £5, and i've assumed you do have some audio equipment with an Aux input!
For 'constant' playback, when yer battery gets flat,... just plug the charger in!
Another benefit is that you can take the leads with you on your travels and setup the same at any of your friends houses with minimal effort!
I don't see the point of the route you are wishing to take - unless I'm missing something (I got in at 7am this morning after clubbing and up at midday, so im knackered!)
Cheers!
Hope this helps!
Dennis! West London UK!

Hi Dennis,
Well the schools here aren't all that far ahead ( I think, because I`ve lived in Australia for 6 years)!
It runs in the family!
I was able to find some handy info on some dockingstations on google, but I'm not very sure.
Is it true that the serial dockingstations have an audio connector on the rear side, opposite of the power connector?
Is the audio connector on the dockingstation the same thing as the one, which is found at the bottom of the XDA (would it disable the built in mic and speaker of the XDA and send the audio through connector on the back)?
If this is true, could I simply attach a 2,5mm to 3,5mm converter to the back of the dockingstation and attach the converter to my subwoofer?
Kind regards,
Tony Schattat

Audio playback
Hi there Tony
I'm still not sure exactly why you want to connect your USB cradle to play music through.... seems pointless to me..
The method I described would be the easiest for you to 'amplify' the audio output from the XDA2.
I may be wrong but I dont think the USB cradles have an 'audio output' connector at the back, it's a bit pointless as these devices aren't devised as 'audio players' - so no, you cannot put the 2.5 to 3.5 mm converter on and then connect that to your subwoofer (signal is wayyy wayyy too small to drive a sub woofer) if there is an audio output at trhe back of the usb cradle, then I never knew about it!! and same again, you cannot connect directly to a sub woofer.
Out of the socket at the bottom of the xda2 in a 2.5mm size, is an audio jack. Get the converter to take that 2.5 mm and output it to a standard 3.5mm headphone socket size. Right, at this stage you can connect 'Hifi' headphones and enjoy your MP3's that way. If you now want your music 'louder' you need to convert that (now) 3.5mm output to be able to connect it to some audio equipment that can 'amplify' the signal and play through some loudspeakers (the 3.5mm socket to Phono converter lead). That will go to your hifi amplifier in turn to which 'full range'loudspeakers are connected. You mention 'sub woofer' .. You could then attach your sub woofer to the amplifier and you will only hear the low 'rumble' of the bass frequency content of the music (again, a bit pointless!). If that's what you want then at this point all will work but then what's your plan for hearing the mid range and high frequency elements of the music?
I'm just thinking that for your final 'aim' (to hear MP3 files on the xda through loudspeakers) the method you are using is cumbersome, time consuming and pointless when you can have a 'full range' output using the method I described.
Take a look at eBay for the connectors - and you'll find you should be hearing music in no time!
Cheers! Dennis! West London UK!

Wiring diagram for headset

Does anybody know the wiring diagram for the supplied headset?
Wolfgang

Sorry wolfgang, this is just a bump and not an answer. I'd also like to know if anyone's investigated the headset. What I'd like to be able to do (and I've never even *seen* the headset yet, still stuck in the hell of trying to obtain an Exec, see other threads) is use the microphone / button from the headset with a different pair of headphones.

I assume you mean the plug wiring? I've not had time to double-check this yet, but I believe it's the same as my Jornada 928 mic/stereo-headset.
Reading from the tip of the plug:
Plug tip: Left ear piece (short cable on the Jornada)
1st ring: Right ear piece (long cable on the Jornada)
2nd ring: Microphone
Top ring: Ground
When it arrived, I briefly tried the Jornada headset in the O2 Exec, and it worked in both ears, but I didn't check the left/right orientation. Until my Jabra BT500 bluetooth headset arrived, I was also using a self-modified (re-plugged) Plantronics single-ear headset with the tip and 1st ring linked to give mono, and that works without problems.
I suspect the standard headset shorts one of the signal lines to ground to give the answer/end function, but don't know which one.
HTH

Hey Astage can you tell me the Headset you using with single headset?
I am not heavy music listener, and I want a wired headset with single speaker ...
I will check plantronics sites also...
Please update me with the model which works fine with Wired Single Headset.

dont forget that you can use completely normal headphones in the Jasjar, this means (as posted Astage) meaning the ring that is the odd one out, compared to normal headphones, is used for both the Mic and the button. If nokia's are anything to go by the button will switch in a resistance of a certain value to indicate it has been pressed (this is because if the Mic is a coil mic it will already read as 0 ohms, a straight short to ground)

Mniko: Unfortunately this will not help you - I have the Plantronics M130 - however, as I said, I had to wire a different plug onto it.
The problem is that most single-ear headsets come fitted with a 3-ring 2.5mm diameter plug, wired as:
Plug tip: Microphone
1st ring: Ear-piece
Top ring: Ground
The Exec/Universal and other microphone+stereo headsets seem to use a larger 4-ring 3.5mm plug wired as per my earlier message. Because of the different wiring for the microphone signal you cannot just use a 2.5 to 3.5mm converter - even if you can find one. The situation is made worse if the headset (e.g. Plantronics) has a microphone sensitivity switch built into the plug, as you may need to also transfer this into the new plug.
Ice_coffee: Thanks for the update - saved me having to cut mine open.

yes I understand.... the prob is 2.5 & 3.5mm... I dont think any headset available around 3.5mm with mic and single headset, that made me to cut off the second speaker, which I already did...
I found one on http://pc-mobile.net/pxdaa.htm
But they dont seems to have it anymore... I really wonder how come HTC didnt thought of it... after all universal is a phone to rite?

Ok well, using my multimeter and some maths I figured out that
1) Under normal circumstances the jasjar sees the mic as a 1000 ohm load
2) It knows when you have pressed the button because the load drops from 1000 ohms to a mere 45 ohms
3) you could acheive this by putting an 47ish ohm resistor on a switch in parallel with the mic, using this info you can construct a working headset from almost any headset on the market, most notably the many many headset/mic combos available for PC's

Connecting phone to a car stereo

Hi all
I have a MDA compact which I wish to connect to my car stereo as a handsfree unit. I have an auxiliary input for my stereo.
Is it possible just to purchase a 2.5 to 3.5mm lead for this? I have a gut feeling the mic won't work - please help? Is it possible to buy such a lead with a built in mic?
Thanks
Carl

Hi, I used to have a XDAII which I connected to the auxillary port on my car stereo, just like you suggest. It worked perfectly. When using the phone, the caller's voice woudl come out of the car speakers and the mic was powerful enough to pick up my voice even though the unit was mounted on my windscreen.
Unfortuntely, both the Wizard and the Exec automatically disable the mic when you plug into the headphone socket. Not sure about the MDA comact. Sorry couldn't offer more advice on your particular device, but I hope my experiences help.

monster said:
Unfortuntely, both the Wizard and the Exec automatically disable the mic when you plug into the headphone socket. Not sure about the MDA comact.
Click to expand...
Click to collapse
I do have the same setup. I can confirm U the mic still work after U plug in the adapter but I normally use a BT headset when I am in the car.

OK, so I assume that if I purchase a 2.5mm to 3.5mm lead, the mic should work?

carlreader said:
OK, so I assume that if I purchase a 2.5mm to 3.5mm lead, the mic should work?
Click to expand...
Click to collapse
Yes. 8)

OK - did some work on this.
I decided to cut the earplugs off of the supplied headset, and attach a 3.5mm socket.
I now have a custom XDA mini lead
All works, however volume from car stereo speakers is extremely low. Any ideas? (Yes, I have checked car volume, phone volume and headphone volume!)
Cheers
Carl

jackleung said:
monster said:
Unfortuntely, both the Wizard and the Exec automatically disable the mic when you plug into the headphone socket. Not sure about the MDA comact.
Click to expand...
Click to collapse
I do have the same setup. I can confirm U the mic still work after U plug in the adapter but I normally use a BT headset when I am in the car.
Click to expand...
Click to collapse
Hi Jackleung, my mic is being diabled, and i am beginning to think that I may not have the right connector. I have a standard 3.5mm connecting the exec. Can you let me know how you have wired your device with the type of connector? You may be able to solve a longstanding problem of mine.
Thanks in advance.

I found my mic was cancelled with the Mini, hence the custom cable.
hope this helps!

monster said:
Hi Jackleung, my mic is being diabled, and i am beginning to think that I may not have the right connector. I have a standard 3.5mm connecting the exec. Can you let me know how you have wired your device with the type of connector? You may be able to solve a longstanding problem of mine.
Thanks in advance.
Click to expand...
Click to collapse
I think my adapter is just a standard 2.5mm to 3.5mm converter. I tried 2 different adapter (one from Radio shack and the other one from ebay: http://cgi.ebay.com/USB-CABLE-headp...ryZ15040QQssPageNameZWD1VQQrdZ1QQcmdZViewItem)
Both are working for me (I will try again today and confirm U tomorrow), therefore I think yr problem is in the exec hardware itself.
To Carl,
Yr setup will not work since yr supplied headset adapter has at least 4 connection on the plug compare to 3 on the standard one. The extra connection is for the mic. If U cut the wire like this:
<---- X --- mic+volumn control ------ ear plugs
Then U can no longer use the mic w/ the custom wire. But if U:
<------- mic+volumn control -- X ---- ear plugs
then the mic on yr mic+volumn control will pick up the voice

hi jackleung
Thanks for the reply - the lead was cut after the mic but before the earphones.
This was because a standard lead with a 2.5 / 3.5mm adaptor didnt work.
My only issue now is the low volume!
Cheers
Carl

I tried it on my Imate Jam again. My mic on the Jam still works (eg: Voice Command via Cyberon Voice Dial. So do phone conversation) even I use my 2.5mm/3.5mm adapter to connection it to my car stereo.

Hi,
I did the same for me and a friend of mine with a Univer..er - Jasjar and connected this to an FM transmitter - We have excellent sound quality, volume and the you can still answer calls by pressing the Mic Button
Frikkie
(If you are gonna be late - dont rush, else someone else and YOU will be cross)

check connections?
I have done exactly what you did, put a 3.5mm socket on the end of the included handsfree cable.. volume is fine, and i regularly connect it to the aux in the car, and multiple sets of headphone/speakers...
The best suggestion to your volume problem is to try again.. i know i had issue with the stereo channels getting screwed up (and even combined at one point) and it was just trial and error getting the connections clean..
You have to ensure that both the shaft and tip connectors on the socket are grounded to the shared ground on the circuit board.. otherwise the audio will probably be less than perfect.. check for dodgy soldering/connection.. coz i can assure you that your theory does work!
Dan

There is another topic on this here.
The person from there uses:
http://www.expansys-usa.com/product.asp?code=PPCPADPT02
which has two 3.5mm plugs.
Description: It has a 2.5mm plug at one end (this plugs into the PocketPC) and two 3.5mm sockets at the other end (into which you plug your 3.5mm headset or headphones).
My question was: could I put a standard 3.5 car kit mic into this 3.5 headset jack (the one with the mic)? Would the mic work if I plug it into a headset jack?
I assume the other one (headphones = stereo only) I will plug it directly into my car auxiliary via a 3.5mm to RCA cable, right?