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Author Topic: Axient Digital guitar noise  (Read 824 times)

Jens Palm Bacher

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Axient Digital guitar noise
« on: February 19, 2019, 02:42:48 pm »

Do anyone else have experience with noise from guitar pickups when used with Axient Digital?
Sounds like some kind of white noise, that is dependent on tx power.
The noise goes away when changing to cable or Axient analogue.

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Jason Glass

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Re: Axient Digital guitar noise
« Reply #1 on: February 19, 2019, 04:50:42 pm »

Do anyone else have experience with noise from guitar pickups when used with Axient Digital?
Sounds like some kind of white noise, that is dependent on tx power.
The noise goes away when changing to cable or Axient analogue.

Yes, this is a widely known issue with some piezo pickups and guitar preamps.  The AM component of the digital TX modulation leaks into the audio circuit through the guitar's electronics and demodulates as audio noise, which is faithfully passed along with the intended audio.  The most common solutions are to use minimum TX power and locate the pack as far as possible from the guitar, or replace the guitar pickups and/or preamp with better shielded or lower impedance hardware.

Jens Palm Bacher

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Re: Axient Digital guitar noise
« Reply #2 on: February 20, 2019, 05:15:55 am »

Yes, this is a widely known issue with some piezo pickups and guitar preamps.  The AM component of the digital TX modulation leaks into the audio circuit through the guitar's electronics and demodulates as audio noise, which is faithfully passed along with the intended audio.  The most common solutions are to use minimum TX power and locate the pack as far as possible from the guitar, or replace the guitar pickups and/or preamp with better shielded or lower impedance hardware.
Did you speak to Shure about it? It seems to be much more prominent in Axient Digital than Sennheiser 6000/9000.
Maybe the modulation scheme makes a difference, Axient is 16QAM, Sennheiser is Pi/4 QPSK...?
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Re: Axient Digital guitar noise
« Reply #2 on: February 20, 2019, 05:15:55 am »


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