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Post by sleeptotem on Oct 14, 2021 21:21:03 GMT
Ever since I started my modular journey ive noticed that my AE can be a bit noisy. So today I decided to one by one test which modules where contributing to the noise and ive concluded (obvious to many perhaps) that the digital modules, in my case 2 wavetables modules, were the main culprits. Without no patching at all, just by having the modules plugged into my system the noise starts. Again its very minimal noise, nothing that will stop me from using those modules or really affect my enjoyment of them, but still its there. So my question is, are there any solutions to this issue that dont require post processing or is this just something that digital modules will more than likely introduce? Ive attached 3 audio files as examples, one with no wavetables, one with 1 wavetable plugged in and one with 2 wavetables. No wavetables.wav (2.89 MB) 1 wavetable.wav (2.92 MB) 2 wavetables.wav (2.94 MB) |
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Post by keurslagerkurt on Oct 14, 2021 21:51:10 GMT
Following as I have the same 'issue'. I don't mind it very much, but when I really want a 'silent' part it can be a bummer. I mostly try to fix it in post production
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Post by Kyaa on Oct 14, 2021 23:40:47 GMT
I'm currently developing a digital module. I had a lot of noise issues until I implemented a suitable filter in line with the power supply. I wonder if a kind of noise filtering backpack could be created to alliviate the issue, or if the noise is originating from the sound output stage. Hmmm...
I'll try experimenting later, as I have a noisy wavetable module as well.
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Post by maydonpoliris on Oct 15, 2021 7:38:45 GMT
Always just assumed it was my cables. Nice work detective sleeptotem . |
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Post by robertlanger on Oct 15, 2021 8:01:31 GMT
From a development point of view, it's always crucial to add a filter in the supply line of the module; mostly a simple R-C filter does the job quite well. I added these in all modules with a powerful microcontroller, like CIRRUS, and also the WAVETABLES contains it. Also modules with heavy multiplexing of LEDs/Switches need the filtering, most prominent example is the TRIQ164. Maybe, with several of these modules, the noise might add up into the annoying range, I assume. As a solution, the capacitors of the filter could be increased - if it's a serious issue for you, please PM me!
And I'm grateful for this thread; it helps to keep the focus on this important topic!
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Post by robertlanger on Oct 15, 2021 8:03:00 GMT
.... I wonder if a kind of noise filtering backpack could be created to alliviate the issue, or if the noise is originating from the sound output stage. Hmmm... Great idea! |
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pol
Wiki Editors
Posts: 1,277
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Post by pol on Oct 15, 2021 9:30:43 GMT
If you are recording to external gear there's always using a noise gate - I have the ones on my digital recorder's inputs on all the time so I don't even have to think about it, set the level so just cuts the background and has a slow release so you don't get "pumping" when just percussion...
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Post by pt3r on Oct 15, 2021 10:04:23 GMT
If you don't have a noise gate then just record a bit of 'silence' before you crank the volume of the AE modular, the noise that is recorded in that 'silence' can easily be used in Audacity to identify the background noise in the recording and to remove it.
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Post by Kyaa on Oct 15, 2021 15:53:48 GMT
Also modules with heavy multiplexing of LEDs/Switches need the filtering, most prominent example is the TRIQ164. My module in development is driving quite a few LEDs. I had to implement a very strong noise filter to eliminate all the noise. I'll try making the same strong filter on a breadboard and power my wavetables with it to see if I can clean up the noise floor. |
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Post by maydonpoliris on Oct 15, 2021 20:02:15 GMT
If you don't have a noise gate then just record a bit of 'silence' before you crank the volume of the AE modular, the noise that is recorded in that 'silence' can easily be used in Audacity to identify the background noise in the recording and to remove it. gold, thankyou |
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pol
Wiki Editors
Posts: 1,277
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Post by pol on Oct 16, 2021 10:29:43 GMT
If you don't have a noise gate then just record a bit of 'silence' before you crank the volume of the AE modular, the noise that is recorded in that 'silence' can easily be used in Audacity to identify the background noise in the recording and to remove it. even though it doesn't apply to me this is exactly the sort of post that means we all should be on a (relevant) forum... |
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ean
New Member
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Post by ean on Oct 27, 2021 22:12:42 GMT
Wavetables does have a bit of background noise for me. Not a concerning level. FMOS did produce a high pitch noise though. I hope this information can help people if they have a simular issue. I did contact Robert and he seemed to know what was up and told me to send it back. I'll wait for after Christmas. The thing is if one module has noise then the noise will be heard in the whole system. Anyway I've had the AE for a while now and it's still going strong.
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