High “whistling” noise from my guitar/bass amplifiers in my home recording facility?



Asked by: Sheila Plante

Why is my bass amp making high pitched noise?





More often than not, when your amp is making a humming sound, it’s caused by dirty power, a bad ground connection, or fluorescent lighting.

Why is my amp making a whistling noise?

sounds like microphonics(aka strange noises) in the preamp tubes. microphonics can be from unshielded preamp tubes(a little unlikely) or from a preamp tube going bad(more likely). newer preamp tubes don’t go through the QA like they did back in the day, so duds aren’t uncommon.

Why does my amp make a high pitched noise?

The higher pitched and more irritating ‘buzz’ is typically found emanating from the loudspeakers and is usually caused by a ground loop. The most common cause of hum is the ground loop – fortunately it is also the easiest to solve.

How can I reduce the noise on my recording amp?

Use Filters. Using a high-pass filter (around 80–100Hz), you can cut the 60Hz hum directly out of the signal. This won’t affect the frequency content of a guitar too much. Similarly, you can use a low-pass filter around 10–15kHz to remove any unnecessary high interference or hiss.

How do I get rid of ground loop hum?





The ground loop can be eliminated in one of two ways:

  1. Remove one of the ground paths, thus converting the system to a single point ground.
  2. Isolate one of the ground paths with an isolation transformer, common mode choke, optical coupler, balanced circuitry, or frequency selective grounding.


What is a ground loop hum?

It’s most likely a cabling issue that is allowing noise from the building’s AC power lines into your equipment, called ground loop hum. This is caused by a difference in electrical potential at grounding points.

Why does my tube amp whistle?

A: Several things could cause this, but we would be willing to bet that you have a tube amp, and that one of the preamp tubes is going bad. What’s happening is that once the problem tube is thoroughly warmed up, the noise is abating.

Why is my car amp making a high pitched noise?

The main reason why they are making noise is because the power supply is switching at predesignated frequency. Thus, if the wires are not wound tightly, the wires will vibrate and create noise.



What do preamp tubes do?

In short, the job of the preamp tube—when used in an actual preamp stage rather than an effects or phase-inverter stage—is to take a low-voltage audio signal that comes into it and ramp that up to a higher-voltage signal that is sent along to the next stage of the amplifier.

How do I remove hiss from audio?

Focus here's the low frequency. Focus here's the high and low frequencies only. And then finally the mid. Frequency. Focus so pick the one that sounds the most transparent. For your recording.

How do you ground a guitar amp?

A grounded amp will have a reduced noise floor, and it’s today’s standard, and how it’s intended to be used. It’s also safer to use. To ground an amp just plug it into a socket that has 3 prongs, the third being the ground one. If there are none available, I recommend seeking help from a specialist.



How do you turn off hiss recording on guitar?

The easy solution is to reduce the noise with an equalizer. You can easily find the offending frequency by boosting different bands on your EQ. The more you remove that frequency, the less prevalent that noise will be in your signal.

How can I record my guitar without noise?

If you’re still into using amplifiers, you may also want to consider using an amp DI box. Instead of plugging your guitar into the DI box, you connect your amplifier’s speaker output. In my opinion, this is probably the best way to record electric guitar without noise.

Why is there so much white noise when I record?

There a handful of reasons that a microphone will emit static sounds. The most common problem is that the gain, which is basically the mic’s sensitivity, is set too high on your amp or audio interface. However, ambient sound, bad cable connections, and moving air are also common culprits.

Can you remove white noise from an audio recording?

The bad news is that you can’t remove white noise from a recording completely. White noise by definition lives all across the frequency spectrum, and can’t be distinguished from signal where they both exist.



What causes audio hiss?

The cause of hiss noise is the electronic components themselves, referred to as inherent or self noise. The level of a circuit’s inherent noise is called a noise floor, expressed in decibels (dB).