DAB+ App: (real)zoulou's DAB-Z app (official support thread)

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Jun 28, 2022
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Hi, I have an issue with fairly frequent 'ducking' when playing a station which I listen to most frequently, LBC here in London, UK. I have an AVIN 4 running the latest firmware - reinstalled yesterday from scratch, with the only 3rd party app being DAB-Z v1.9.127. The signal strengh seems very strong always 5 green bars so I'm really not sure what else to do as I love DAB-Z. I have swapped out the USB dongle twice and that hasnt made any difference to the issue. I am happy to pay for support if that helps at all. Many thanks, David
 

realzoulou

Senior Member
Nov 3, 2016
913
1,156
Greater Area Munich
@davidwatson007DAB
I have an issue with fairly frequent 'ducking' when playing a station which I listen to most frequently, LBC here in London, UK.
Hi @davidwatson007DAB . When DAB-Z "ducks" then because some other app on the device outputs audio intermittently. See post #3,515
In case you are using CarPlay or AndroidAuto, then it could even be an app on the phone, which "disturbs" listening to DAB-Z.
If your device is rooted, then you could create a system-wide logcat from DAB-Z Settings->Info *after* such unwanted ducking occurred. Send it to my email address and I can have a look whether I find the "offending" other app. My GMail email address is visible in the Info screen as well.
 
Jun 28, 2022
6
0
Hi, thanks so much for your reply. I'm just wondering what else could cause the ducking issue. I had contacted Avin and they sent me the latest fw Android o/s so I completely reset the Avin 4 head unit with no Satnav installed although it's possible my phone might have been Blutooth connected. But DAB-Z still ducked quite frequently. What I will also do is test on stations other than LBC London and just check if the behaviour is the same on any other station.
 

rigattoni

Senior Member
Apr 27, 2010
1,845
603
Fuerth
Hi, thanks so much for your reply. I'm just wondering what else could cause the ducking issue. I had contacted Avin and they sent me the latest fw Android o/s so I completely reset the Avin 4 head unit with no Satnav installed although it's possible my phone might have been Blutooth connected. But DAB-Z still ducked quite frequently. What I will also do is test on stations other than LBC London and just check if the behaviour is the same on any other station.
Have a look if there are some notifications from upcoming Mails, Whatsapp or anything like that, even from your phone. Disconnect your BT connection and test again if the ducking is still present.
 
Jun 28, 2022
6
0
I will take a look thanks. Actually I have two phones. One is a Blackberry Key which is acting as a WiFi hotspot to my Avin 4 head unit and the other is a cheap Nokia C2-01 which is connected via Blutooth. I'll disconnect both and see if that makes a difference - Many thanks
 
Jun 28, 2022
6
0
Hi, I've just tested my Avin 4 BMW system again this morning. Neither of my 2 phones were connected to the system. WiFi is turned off on the head unit too. But I still get the annoying ducking on LBC London.... I dont think it's the station as we have DAB in the house and the signal and audio are perfect. The Avin 4 has been factory reset also and that has made no difference. I am now wondering if it's the latest DAB-Z causing this issue as I dont recall earlier versions of DAB-Z having this problem. Do you think that's possible at all? Many thanks, David
 

rigattoni

Senior Member
Apr 27, 2010
1,845
603
Fuerth
Hi, I've just tested my Avin 4 BMW system again this morning. Neither of my 2 phones were connected to the system. WiFi is turned off on the head unit too. But I still get the annoying ducking on LBC London.... I dont think it's the station as we have DAB in the house and the signal and audio are perfect. The Avin 4 has been factory reset also and that has made no difference. I am now wondering if it's the latest DAB-Z causing this issue as I dont recall earlier versions of DAB-Z having this problem. Do you think that's possible at all? Many thanks, David
If you think a former version did not show this issue, you can try to sideload an older version. Just have a look at https://apkfab.com/de/dab-z-player-for-dab-dab-usb-adapters/com.zoulou.dab, there you can find older versions for testing.
As already been mentioned by realzoulou: If your unit is rooted, please provide a logcat DAB-z --> Settings -->Info
 
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IG_Vasilich

Senior Member
I dont think it's the station as we have DAB in the house and the signal and audio are perfect
You shouldn't compare reception quality between stationary radio in the house and DAB receiver in the car with many other interference sources.
Try to listen to other stations (if possible - from another DAB ensemble) to be sure that it is not the station who makes problems...
 
Jun 28, 2022
6
0
Hi, that's perfectly true! I wont compare home DAB to DAB running on my Avin 4 setup on my BMW 7 Series. I think that's a good idea to try other stations. I think what is throwing me a bit is although I prefer to listen to LBC in London I do note the signal quality even during the ducking remains at full strength. One other thing I should add is that this occurs even when the car is just sitting in my driveway going nowehere!
 

rigattoni

Senior Member
Apr 27, 2010
1,845
603
Fuerth
Hi, that's perfectly true! I wont compare home DAB to DAB running on my Avin 4 setup on my BMW 7 Series. I think that's a good idea to try other stations. I think what is throwing me a bit is although I prefer to listen to LBC in London I do note the signal quality even during the ducking remains at full strength. One other thing I should add is that this occurs even when the car is just sitting in my driveway going nowehere!
Well... did you already follow my instruction? https://forum.xda-developers.com/t/...official-support-thread.3609608/post-87828455
 

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  • 2
    @AntonyTime
    where are you located? Are you sure that there is some DAB+ broadcasting in your area? check here pls https://www.worlddab.org/countries/italy#coverage
    Moreover, your DAB antenna has been installed wrongly (as I see from your picture) - the last part (farmost from antenna housing) should be connected to unpainted metal part of your car - read/watch installation manuals for that type of antenna.
    2
    Hi, I've just tested my Avin 4 BMW system again this morning. Neither of my 2 phones were connected to the system. WiFi is turned off on the head unit too. But I still get the annoying ducking on LBC London.... I dont think it's the station as we have DAB in the house and the signal and audio are perfect. The Avin 4 has been factory reset also and that has made no difference. I am now wondering if it's the latest DAB-Z causing this issue as I dont recall earlier versions of DAB-Z having this problem. Do you think that's possible at all? Many thanks, David
    If you think a former version did not show this issue, you can try to sideload an older version. Just have a look at https://apkfab.com/de/dab-z-player-for-dab-dab-usb-adapters/com.zoulou.dab, there you can find older versions for testing.
    As already been mentioned by realzoulou: If your unit is rooted, please provide a logcat DAB-z --> Settings -->Info
  • 62
    Last updated: 2022-10-13
    Release notes of currently active release on Google Play 1.9.127
    Release notes of currently active PUBLIC BETA on Google Play: 1.9.127
    If you want to become beta user, subscribe in Google Play or open this link from the device : https://play.google.com/apps/testing/com.zoulou.dab

    The app is available in Google Play named DAB-Z with package name "com.zoulou.dab".
    It can be installed in parallel to any original preinstalled DAB+ Player.

    Get DAB-Z on Google Play

    Get previous versions on Apkpure

    Compatible devices:

    all DAB USB dongles with VID/PID = 16C0/05DC (decimal 5824/1500) ("VOTI", "Van Ooijen Technische Informatica", "shared ID for use with libusb", "[email protected]")
    Examples (for sure not complete!)
    XTRONS USBDAB01
    Joying DAB+
    Pumpkin Y0251
    Hotaudio Dasaita DAB+
    (and dozends or hundreds more, they are all quite the same, if not equal.)
    Use this link to find out more

    NOT SUPPORTED:

    * Any SDR ("Software Defined Radio") devices (e.g. based on Realtek RTL2832U R820T)
    * Fulljoin adapter
    * Dension DAB+U
    * Dasaita DAB box


    Frequently asked questions FAQ:

    DAB-Z's expected behavior regarding Play/Pause, Mute/Unmute, Navi App announcements

    Q: Does DAB-Z support fallback to FM Radio?
    A: No and it is not planned due to technical reasons.

    Q: Why do some stations appear several times in the list but have all the same content?
    A: This is an annoying behavior of the broadcasting stations. DAB-Z does not lump them together to give the user the choice to pick one into the favorites list that has the best signal strength.

    For testers ...​

    ... that want to actively support me and help everyone to have a better DAB-Z app:

    If you encounter an issue with DAB-Z, I will maybe ask you to provide a) logcat logs or b) raw recordings.

    a) logcat logs are created by pressing the logcat button in DAB-Z Settings -> Info (at the very bottom)
    A zip file is created and you will be able to choose what to do (send via Email, add to Google Drive, etc...). Get this zip file to me somehow.
    If I additionally ask you to enable "OMRI verbose logging", then follow these steps before creating the logcat as above:

    1. Enable Developer Menu: tap 7x on DAB-Z Settings->Info->Version , then go back, a new menu item appeared "Developer options" at the very bottom
    2. Enable OMRI verbose logging
    3. Close DAB-Z
    4. Reopen DAB-Z
    ... reproduce the issue ...
    5. Create the logcat DAB-Z Settings -> Info (at the very bottom)

    b) raw recording are created by this procedure:

    raw recordings are done using this procedure:
    1. Enable Developer Menu: tap 7x on Settings->Info->Version , then go back, a new menu item appeared "Developer options" at the very bottom
    2. Enable OMRI raw recording (you don't need to activate verbose logging)
    3. Close DAB-Z (raw recording enable/disable requires a restart of DAB-Z)
    4. Reopen DAB-Z
    ... reproduce the issue ...
    6. Go to DAB-Z Settings and disable OMRI raw recording. Restart DAB-Z again.

    Afterwards, files with ending .raw exist in:
    <internal memory>/Documents/DAB/rec/
    Download them all from the head unit, zip them and send to me.
    18
    Release ZOU-DAB+171119 "Master Piece"

    Release of the "Master Piece" version of the DAB+ App mod.
    ZOU-DAB+171119

    Download: REMOVED

    ZOU-DAB+171119-Flip-AutoHide.gif

    Credits for translation to Norwegian goes to again to XDA member @[email protected]
    Credits for translation to Italian goes to china-rns.com member John Dai

    Changes (see also Changes.txt from the download):

    New:
    - Station logos
    Station logos can be downloaded from Volkswagen for >20 countries across Europe and automatically installed to a User accessible location. More than one country can be installed. User can add own station logos in subfolder "<extStorageDir>/DAB/logos/user" in JPG or PNG format. No width/height restrictions for the logo. The app will automatically scale to fit.
    Settings allow to enable/disable showing station logos in station list and in Slide Show area. Scaling can be limited to 1x,2x,3x if needed.
    Settings list any issues in finding a matching logo for a certain station. The search is based on the station name. If no exact (substring) match can be found in the list of logo files, then a default logo is presented. The User has to fix this by renaming logo files or adding additional logo files outside(!) of the DAB app using a File Manager.
    - Layout:
    * new button icons
    * button bar moved from left to right side to gain more space for the slide show area
    * Changed the "logic" of the favorites button: Shows what will happen when pressing it, not what the current status is.
    * new "radio.png" logo. Using now a new DAB logo used in Germany (www.digitalradio.de)
    * the background boxes are not disabled by default. Can be reactivated in Settings.
    * General layout optimization for
    - 800x480 @ 320 dpi
    - 800x480 @ 240 dpi
    - 1024x600 @ 320 dpi
    - 1024x600 @ 240 dpi
    - Removed the previously added "Large SLS" activity. Replaced with an animated fade out of the station list.
    - Added an option to automatically hide the stationlist after a selectable timeout.
    - Added Audio format (MP2 or AAC) and Sample rate (44,1 or 48 kHz) to Station details. As before in the Large SLS, still accessible via "flipping" the slide show picture.
    - Added an option in Settings to move the App to background when the DAB App was started by the "USB device attached" event. Useful eg. when using certain launchers.
    - New logo in the notification bar.
    - Settings->Info shows the reason why the DAB App is running: Either started by "LAUNCHER" or "USB DEVICE ATTACHED"
    - Settings->Info shows the screen resolution and density (e.g. 1024x600 @ 160 dpi)
    - When scanning with type "update", old stations no longer received are now deleted. The favorite setting will be kept.
    - Added Italian translation. Thanks to John Dai @ china-rns.com

    Changes:
    - Replaced old "Connecting..." behaviour with a completely new implementation
    - Audio recording now stored in <extStorageDir>/DAB/rec/ (instead of <extStorageDir>/dab_rec/)
    - Fixed: Channels "10N, 11N and 12N" not shown in station details
    - for developers: BroadcastIntent generation is now disabled by default. Can be reactivated in Settings.
    BroadcastIntent definition has changed w.r.t. "artist", "track" and "playing". See change documentation in BroadcastIntent-definition.txt

    Note that the high pitch sound issue is not fixed in the 171119 release.

    Video tutorial for station logo download from Internet:
    http://youtu.be/zVTGYbXsG7I

    Video tutorial for adding own logo pictures :
    http://youtu.be/Bux3LEJoML8
    16
    Release ZOU-DAB+180804 "Master Piece Maintenance Release 5"

    Release of the "Master Piece Maintenance Release 5" version of the DAB+ App mod.

    ZOU-DAB+180804

    Download: http://bit.ly/2Kqp7HB
    (Please only share the bitly link with others)

    Changes (see also Changes.txt from the download)

    - BroadcastIntent: added slsBitmap which contains currently displayed logo or DAB slideshow picture
    Goal: Allow launchers (e.g. FCC Car launcher) to display album art
    INFO: DAB App now also has a fairly complete implementation of Android's android.media.browse.MediaBrowserService interface
    This allows for using pure Android APIs to view metadata instead of using the proprietary BroadcastIntent
    - Add buttons for PREV and NEXT to Notification and use Media style notification
    - PREV/NEXT steering wheel behavior can be swapped in Settings->General
    - Fixed: Volume adjustment in Settings->Audio is lost after station change
    - Fixed: After several station scans, App completely fails to work until re-install.
    - Fixed: Duplicate entries in station list
    - Removed feature to delay the USB connection on automatic start, which was introduced with ZOU-DAB+180210
    - Removed option to avoid that DAB App is started twice from Settings->General. This is now avoided by using Android manifest launchMode=singleTask
    - Removed feature to download a country-specific station logo zip file and automatically extract it.
    Note: You can still copy an extracted folder of such station logos to /DAB/logos/ folder and after pressing "Sync" button in Settings->Station Logo the logo files will be scanned for a match between filename of a png/jpg file and the name of a station.
    13
    Release ZOU-DAB+180618 "Master Piece Maintenance Release 4"

    Release of the "Master Piece Maintenance Release 4" version of the DAB+ App mod.

    ZOU-DAB+180618

    Download: REMOVED

    Changes (see also Changes.txt from the download)

    - Fixed: Adopt Station Logo download to new VW website
    - Add a button to Settings->Info to show hints picture about how to use the UI
    12
    Release ZOU-DAB+170909

    Release of my next major version of the DAB+ App mod.
    ZOU-DAB+170909
    This is not the "master piece" release yet.

    Download: REMOVED

    There are (again) two versions of the App:
    a) the "normal" one
    b) one with no usb_device_filter.xml included, which makes Android remember already granted access of DAB+ App to the USB DAB device.
    However, Android then also starts the DAB+ App whenever it finds the USB DAB device as newly connected, which is the case when you power on the
    head unit.
    Some people don't want that the DAB+ app starts automatically when the DAB USB device is detected at startup. This is the reason why this version exists.
    Note: When running on Android >= 6, this version will most likely ask for permission to access the USB device at *every* start of the app.

    Credits for translation to Norwegian goes to XDA member @[email protected]

    Changes (see also the Changes.txt from the download):

    New:
    - Most (not all) of the texts are now available in: English, Deutsch and Norsk bokmål
    Credits for translation to Norwegian goes to XDA member [B @[email protected][/B]
    - Swipe to right in station list shows a delete button. On swipe left again, delete button disappears. On click on delete button an alert dialog appears to allow the user to confirm. Deletion of stations cannot be un-done. A new scan is needed to get the station back.
    - Additional info (channel and ensemble name) in station list can be deactivated via Settings->Layout
    - "Service Following" feature can be activated in Settings->General. NOTE: This is treated as "Experimental". This activates the original app functionality, which was always in the app, but was not connected to the UI. Do not blame me if you find it not working.
    - Audio recording button can be activated via Settings->General
    - The borders around the slide show picture and around the station list can be deactivated via Settings->Layout
    - A click on the slide show picture creates a large version of the picture. I call this "Large SLS".
    - Swipe left or right on "Large SLS" switches between the picture and some detailled info about the current station.
    - When starting a re-scan one can choose now between "Replace all stations" and "Add new stations"
    - The app sends out broadcast intents containing all information that you can also find on the screen.
    The definition of the intent is in file "BroadcastIntent-definition.txt"

    Changes:
    - Fixed: no audio after standby when using NoKill mods.
    - Fixed: when USB connection suddenly drops, the App remains active but with no audio. My fix is to close the app.
    - Settings layout improved
    - Notification now contains station name instead of "Make DAB+ great again ..."
    - A second way to enter the settings screen is via the "Large SLS" screen
    - Optimization of memory allocations. Results in less Garbage Collector runs, which is good for overall performance.


    Main.PNG Large_SLS.jpg
    ChannelDetails.PNG Credits.PNG

    Videotour through the DAB+ App:
    https://www.youtube.com/watch?v=hHVRfX5n8eM