Exploring the problem of popping sounds

Janebo

Hi, I have aftermarket amps in my car that's controlled by the Amp cont cable, when turn off the ignition there will be a loud pop, are the MCU update for solving this problem?

dudu-lai

Janebo Yes

Blackbandt

McDudu

dudu-lai And what is it? What they posted in the first post? Or is there another? If so, you would have the link to it

Thanks

dudu-lai

Blackbandt What?

Blackbandt

dudu-lai Do you have a link to the mcu update? Or whether the link in the first post is still up-to-date?

dudu-lai

Blackbandt in the post

Janebo

Hi, I updated the MCU still the pop sound when turning ignition off, I see the pitch and roll sensor is Fault after the update, what is going on with the sensor?

Janebo

Sorry the sensor is ok after driving with the car, but still pop sound when turning ignition off

dudu-lai

Janebo Shooting version information

Janebo

dudu-lai

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.

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