Hello all, Im using my old Raspberry Pi B 512mb and a Behringer UCA202 U-Control Ultra low-latency USB/Audio Interface, qjackctl, jack rack and Ladspa plugins. I'm using a lowpass filter and parametric eq to drive my subwoofer. I keep getting popping(thudding 🙂 ) sounds after the music stops playing. I'm using a 1 amp phone charger and have a 1 amp linear PSU with 7805 reg ic. If I add both supplies, the linear powers a usb hub, I still get popping! Does anyone know whats happening?
Do you have any measuring equipment? Voltmeter? I would start by measuring your power while it's plugged into your Rasberry Pi. If it's steady, then that's not an issue.
Next, I'd try some other USB-based DAC. If better,then look at the Behringer....
Next, I'd try some other USB-based DAC. If better,then look at the Behringer....
Hi, thanks for replying. I checked it this morning and there is no sound. Turned monitor on and greeted by a blank screen!
Rebooted, voltage is 4.98v! All software was installed by sudo apt-get install. I have Jessie on the pi. The sound card was running on an Intel Atom Acer Revo before with Ubuntu 15.10. It ran fine! I wanted to use the Pi because it was sat doing nothing, and the Acer Revo was a bit overkill.
Thanks, Mike
Rebooted, voltage is 4.98v! All software was installed by sudo apt-get install. I have Jessie on the pi. The sound card was running on an Intel Atom Acer Revo before with Ubuntu 15.10. It ran fine! I wanted to use the Pi because it was sat doing nothing, and the Acer Revo was a bit overkill.
Thanks, Mike
Strip out all of the plugins and drive the sub directly - at lower volume. If that eliminates the problem. Then add the software components back in, one at a time.
Okay. Popping sound has gone, the screen blanking needed changing to never blank, I did that, but it still blanks??? my Jack Rack is version 1.4.8 ~rc 1-2
Source Forge has it at 1.4.7??
Source Forge has it at 1.4.7??
If Rasbian uses lxde desktop enviroment and Ubuntu Unity, would the Racks be different? I've noticed in the Frequency folder some filters missing. Do I need to install Gnome, perhaps?
Thanks, Mike
Thanks, Mike
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