Question regarding X86 audio input

First post on the forum, so please forgive me if asking questions that are already answered many times Tried search though

I am looking for replacement for my desktop computer (core i3 mini-itx board with lesser specs than X86 Ultra..). Ultra would satisfy my at least most of my needs but one thing is not clear to me yet. Is the analog audio input mono or stereo? Stereo input is a strict requirement as I will be conducting audio measurements with ARTA and it needs dual channel input. ARTA of course support single channel measurements, but for loudspeaker measurements (designing and building crossovers) requires 2ch measurements to have accurate timing information as well.

Planned setup would be Ultra X86 with SSD and latest Ubuntu Mate.

 

The manual says on page 28 that there is only single MIC_IN, so it's only mono.

 

Wonder if it features jack detection, so if a stereo microphone is connected to the headphone part of the TRRS jack, it will switch from stereo output to stereo input.

The Audio IC used in the UDOO X86 is the Realtek ALC283CG, which although I cannot find specs on this particular chip, others from the Realtek rang offer jack detection, so it's possible this one does too.

To test, you would install the HD Audio Manager from Realtek, and use a TRRS splitter (CTIA / AHJ version, not OMTP) and plug a stereo mic into the stereo headphone jack.

 

This sounds like a perfect task for the Arduino part of the X86. If it can be measured, the Arduino is your friend, especially as the Arduino part will provide you with accurate timing, which is much harder to guarantee on the X86 part as it will be running multiple processes competing for the CPU.

 

If UDOO X86 supports that, it really should be mentioned in manual.

 

What's not clear to me is how that single jack would support audio output and input simultaneously. If it does't, we're not going to be able to Skype. I suppose it's easy enough to test by plugging a gaming headset into the jack, and observe how it performs.

 

It is TRRS jack with four signals:

• tip left channel out
• ring1 right channel out
• ring2 ground
• sleeve microphone in

Note that there are different TRRS standards, so you might require adaptor if your headset doesn't use same standard.

 

Thank you for the information.

I ordered these adapters:
www.ebay.com/itm/112062093657
www.ebay.com/itm/332058841674
www.ebay.com/itm/142102770216
www.ebay.com/itm/262941804748

I don't really need the speaker output at this time, because I'm using the on-board speaker ports with two of these remarkably "HiFi" (Frequency range: 200-20KHz) mini speakers with these connectors. But it could be useful for other things...

I intend to use the microphone port with an old USB camera I had laying around. The resolution isn't the best, but the adjustable LED illumination is useful.
I wrote this little shell script for use with it:

Code:

#set +x    # DEBUG
# snapshot.sh    This script will capture and display jpg images
#
# LGD: Sat Jun  3 13:57:30 PDT 2017
#

FILNAM=snapshot.jpg

SNAP(){
vgrabbj -f "$HOME/Desktop/$FILNAM"
STAT=$?
[[ $STAT != 0 ]] && echo "Failed to capture image"
[[ $STAT == 0 ]] && echo "Image $HOME/Desktop/$FILNAM captured successfully"
return $STAT
}

MENU(){
  cat <<!


    1.  Enter image file name
    2.  Snap shutter release
    3.  Display $FILNAM
    Q.  Quit

!
  read -n 1 REPLY?"Please enter the number of your choice: [Q]? "; echo 
# NOTE: For bash use: read -n 1 -r -p "Please enter the number of your choice: [Q]? "; echo
  case ${REPLY:-q} in
    1) echo; read FILNAM?"Please enter the File Name: "; echo; \
    echo -e "Image will be written to $HOME/Desktop/$FILNAM"    ;;
    2) SNAP                ;;
    3) ristretto "$HOME/Desktop/$FILNAM";;    # Or fbi if not in X11 mode
    *) exit 0               ;;
  esac
}

# MAIN LOOP
while : ;do
  MENU
done

 

Of the four I ordered, this one is the only one that actually works with the Udoo X86.

 

I use my m-audio USB audio interface as a soundcard with the Udoo-x86, so I imagine the cheaper USB sound cards should work fine as well, like this maybe? https://www.amazon.com/External-Ada...coding=UTF8&psc=1&refRID=TYHNDGQGSC1PWJ5E0YDD

 

Thanks for the information. When I follow that link I find "NUWA External USB Stereo Sound Adapter" not M-Audio.

I prefer to use the audio devices designed into the Udoo X86 if possible. But, I've found it to be a bit of a challenge (like the internal 32GB eMMC storage). Of course, when I plug the adapter into the audio jack, sound ceases to emanate from the speakers plugged into the on-board connectors.

 

It was an example of one of the "cheaper USB sound cards"

 

REF: UDOO x86 audio input.
Not all TRRS connectors are created equally. An Apple stereo headphone and microphone cable worked well for me. These adapters from Amazon.com are too long, they don't mate up well or pass audio.
https://www.amazon.com/gp/product/B01J4DWYFM/ref=oh_aui_detailpage_o06_s01?ie=UTF8&psc=1