Exploring the problem of popping sounds

dudu-lai

Janebo Shooting version information

Janebo

Janebo MCU has been successfully updated. At this time, the AMP cont line of the A interface will output 12V voltage after 5S of booting into the system. If there is no effect, please check whether the connection is correct, or measure the voltage after booting into the system to see if it is valid.

Janebo

dudu-lai The system is ok on startup, no pop sound, the sound is appearing on shutdown to sleep or shutting down to off modus, ignition off,

dudu-lai

Janebo Are you using the RCA low-level or high-level audio from DUDU?

dudu-lai

Janebo Hi, please record a video of a popping sound after the shutdown.
Could you reproduce the issue multiple times and upload the recorded video to Google Drive and share it with me for download?

JhonnyD

Ja. Und es nervt so sehr. Bei beiden Autos knallt es so laut. Dass wir Angst haben, dass unsere Lautsprecher kaputt gehen.

Janebo

dudu-lai I am using the RCA Low level for subwoofer and for front and rear speakers, using the blue wire, Amp cont for controlling the aftermarket amplifier,

I don't know if this is possible: if the software allow to turn off the Amp cont wire 1-2 seconds delay before the unit power down, then there will be no power at the amplifier when the pop sound is happening

dudu-lai

Janebo Software can't do this. You can add an audio isolator to the RCA connector to solve this problem.

Janebo

Ok, so there is no way the MCU can be programmed to first turn off the Amp cont before shutting down the device?

dudu-lai

Janebo no way
The device has no way of knowing when you want to turn it off.

Janebo

dudu-lai the device don't know when you want to power it down, but when it getting signal to power down then first turn off Amp cont before start to power down

JhonnyD

When i press reboot, the device knows. You could program a 2 seconds delay. Turn off amp, reboot device.
Same when installing a new firmware. The countdown appears, turn off the amp, reboot.
This loud bang in the speakers is horrible.

dudu-lai

JhonnyD No, everyone's needs are different. Some users will set a 5-minute delay. If the AMPcont loses power, the car audio will be silent. The user cannot use it during these 5 minutes.

Janebo

The device getting the power off signal when turning ignition off, then turn off the Amp cont before power down, it's very simple

dudu-lai

Janebo (No delay shutdown is set) When the ACC power cut signal enters the car computer, the device has already shut down. How can the MCU disconnect the AMP power in advance? If the device is set to delay shutdown for 5 seconds, and the AMP power is disconnected after the ACC is detected, the phenomenon I answered JhonnyD will exist.
I think it is difficult for the device to do this.

It is recommended not to use the AMP control line provided by the device, but to directly connect the amplifier control line to the ACC and add a delay electronic component in the middle.

Blackbandt

What isWhat exactly is the problem with the popping? It must be possible to fix this error. With all the other radios like Pioneer, keenwood, alpine etc I didn't have such problems.

My brother-in-law had installed a keenwood in front of the Dudu7. There was no popping. Neither when switching on nor when the device is switched off. Only when the dudu was installed was the popping there. And no, it's not because of Gnd or anything. Because so soon you install the keenwood again the popping is gone.

I think it's a shame with such a price from the radio.

dudu-lai

Blackbandt What car is it installed on?

Janebo

Blackbandt I think the main problem is that the DSP Chip lose power before the Amp cont is turned off, so that your amplifier is still turned on when DSP chip is losing power

Janebo

dudu-lai when 5 minutes is timed out then turn off Amp cont before shutting down

JhonnyD

Das sehe ich ähnlich. Zur aktuellen Zeit würde ich kein DUDU mehr kaufen. Durch den Steuerkrieg müssen wir mittlerweile bis zu 1000 Euro für ein DUDU7 zahlen.
Auch wenn das alle glauben, aber die normalen Menschen in Deutschland oder der EU sind nicht reich.
Die einzigen die reich sind, sind die Politiker die gegen unseren Willen arbeiten.
Zum Verständnis. Hier im Norden von Deutschland verdient man im Durchschnitt 2000 Euro im Monat.
Eine leine Wohnung kostet mittlerweile 1200 Euro im Monat.
Dann muss noch alles andere bezahlt werden, da bleibt nichts übrig.
Man spart sich also ewig lange ein DUDU vom Munde ab und das Teil kommt mit so vielen Macken.
Könnte ich verschmerzen wenn es vielleicht 300 Euro kostet, aber nicht bei 1000 Euro.
Ich hoffe ihr versteht was ich meine.
Grüße

dudu-lai

Janebo Timer? After a set delay of 5 seconds, disconnect the AMPcont power supply 2 seconds before shutting down?

Janebo

dudu-lai just make sure that Amp cont is the first thing to turn off before the rest of the unit turns off, so when the ignition is turned off, Amp cont can be turned off before the rest of the system turns off, or if you have chosen to turn off after 5 minutes, make sure that Amp cont turns off first before the rest of the system, it should be a priority to turn off Amp cont first when the system is about to turn off

Blackbandt

dudu-lai It is installed in a VW Transporter t5. Canbus Box is a raise as they recommended back then.

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