Hum x ground isolator11/29/2023 ![]() Ferrite beads aren’t designed for audio rate noise – rather, for things like network or USB cables. You can either buy a transformer or cable with a built in choke, or buy a separate ferrite bead and install it on your cable. Ferrite beads/chokeĪnother option that may work for you is Ferrite beads or a ferrite choke. One thing I have noticed this do is invert the audio’s phase, which is probably not a big deal unless there’s a particular case where this is a problem for you. However, your audio interface or other gear may not support balanced outputs, so plugging a balanced cable into it won’t help…which brings us to solution number three… Use a ground loop isolatorĪ favorite of mine is a simple and cheap ground loop isolator – just pass your audio through it and magically the annoying ground loop noise will disappear. If you’re like me and just don’t want to run wires so that everything is plugged into one place, use balanced, or XLR or TRS cables across your setup – while these cables may look like stereo cables they’re actually used to carry one mono signal, so you’d need two to carry stereo audio. I’ve seen people recommend removing the ground pin or using a ground lift plug on one but not both of your sockets – I’m no electrician but that doesn’t seem safe to me – and the only reason I’m mentioning it is because that’s something I think you shouldn’t do. If a ground loop is the problem – Plugging everything you’re using into the same outlet will probably solve it – most noise or hum issues coming from ground loops are a result of having your setup plugged into more than one wall socket in your studio. ![]() Here are a few ways to solve this problem: Often, both ends of an isolator can be used as an input or output.Have you ever hooked up a new piece of gear into your setup and suddenly heard a horrible noise you weren’t expecting? Or just had an unbearable noise find its way into your recording without you noticing in the heat of the moment? The cause may be a ground loop, some other interference, or even loud air-conditioning. Your average ground-loop isolator will have one or more channels with an input and output, where each channel is kitted out with a special transformer that transfers sound signals magnetically rather than electrically. It does this via a specialised transformer which transfers the audio signal magnetically rather than electrically. Frequently Asked Questions About Ground Loop Isolators What is a ground-loop isolator?Ī ground-loop isolator is a handy tool used to remove electronic noise from an audio signal. If you need other stage and studio audio tools, see our range of DI boxes and peripheral audio equipment. Using electronically balanced signal cables over longer distances and keeping them well clear of any power cables, video cables or other signal-carrying cables also helps. The best way to avoid any ground-loop issues is to hook all of your audio equipment up to the same power group. Some isolators can treat both balanced and unbalanced audio signals, and some isolators will also come fitted with noise level controls. ![]() This effectively 'skips' any DC-related noise, leaving you with clean and hum-free sound. Clean Up the Audio with a Ground Loop Isolator Thankfully, there are plenty of ground-loop solutions out there, so you can find the right tool for the job. How do you solve a problem like ground loops? This common audio-based gremlin can add an unpleasant hum and buzz to the sound of a PA installation, studio gear, or even your trusty stereo HiFi system.
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