Shouldn't have a hum, and if you have tried other cables, have you tried direct into the KRKs? Also can you try a DI box or USB isolator?
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DDJ-SB3 RCA Output hum ?
Hello ALL, New here :)
Running a DDJ-SB3 into a Focusrite Scarlett Gen 3 18i20 interface using the USB and RCA plugs that came with the machine with Serato DJ pro. When I connect the RCAs to 1/4 jack directly into 18i20 the music playback is significantly decreased to about half volume and a Huge drop in bass Freq. if i unplug either RCA ( just one) the music comes back up to normal with a huge HUM sound. tried different cables, double checked input settings ( not on PAD or Instrument) same HUM. sounds like the same if you plug in a guitar cable into an amp and place your thumb over the end (60 Hz ?)
All updates are current. This was straight for playback and not running into a DAW. Settings Input/Output is Focusrite 18i20 into 2 KRK 10's isolated on stands.
CHEERS AND THANKS !!
Windows 10 (new computer)
DDJ-SB3
SERATO DJ Pro
Ableton 10
Native Instruments
Korg PADKontrol
Roland D-500 MIDI Keyboard
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Pictured here is a picture of the audio out from the Pioneer DDJ SB3. The noise seems to be connected to the unit.
Test ran:
1. I recorded multiple clips in Audacity using different USB ports and audio in ports. Each time the hum was thick throughout the clips.
2. I plugged two of my mics into my PC, both using the same mic line in ports. Neither time did I have the hum noise.
3. I unplugged each side of my RCA line from the Pioneer, one at a time and recorded clips to see if either side was the issue. The hum was the same both clips recorded in Audacity.
4. I did notice that when I moved around my RCA line the frequency sound in my headphones changed in pitch. However, I can hear the change in frequency from the unit lights in my USB port as well.
Are these units known to have bad audio output? I will try a new cord, but the one that came with the unit is the one that's changing frequency pitch when I move it.
Would a USB powered port help eliminate this issue?
Any suggestions on any other troubleshooting would be nice.
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This is almost exclusively noise caused by your computer system and the interference is being amplified by the SB3's audio output. You can try using a USB ground isolator / power injector to separate the power from the computer.
An easy way to test is if you're on a laptop to disconnect the computer's power supply - you may hear a change in the audio interference.
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I'm looking into that now. Thank you for the feedback.
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