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Forum: Old versions

Topic: vms4.1 power supply

由于该帖子已年深日久，可能包含陈旧过时或描述错误的信息。

I am experiencing when my power supply is plugged into the vms4.1 i get the crackle popping noise. but it goes away when the power supply is unplugged. I have replace the power supply with a new one and the noise still persist. but only when the power supply is in use.
any ideas out there.

vdj7.4
windows 7
creative sound card
 
发表时间 Fri 07 Mar 14 @ 11:31 am
same issue when using soundcard of the vms...?
using same electric circuit for the power suppy and amplifier ?
tried e.g. the ground lift funktion if avaliable...?
 
Rob
thank you for your reply. it is currently plug into a adp power surge unit. and what do you mean ground lift??? currently i am using only usb power which is working fine.
so as i stated before brand new power supply same result as the old power supply crackling sound as soon as i plug it into the vms4.1. if i unplug the power supply the crackling noise goes away.
 
i just did another test when power supply is plug in there is minor pops but when i play music the cracks and pop gets worst like scratching noise
 
On one hand it sounds like a latency issue - you have the VMS4.1 ASIO buffer set too low. This is a common cause of pops/clicks.

On the other there may be a ground loop issue, which is why ground lift was mentioned.

You say you're using a VMS4.1 but also mention a Creative card. Which one is crackling?

If you're running VDJ on a laptop, try unplugging the laptop PSU (running the laptop on battery). Does the noise stop?

Have you swapped the VMS4.1 USB cable for another? Have you tried using another computer?
 


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