#16
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I don't know if you talked about your room size or treatment anywhere. Any chance it could be room resonance at those frequencies? Room EQ Wizard might give you a clue.
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#17
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You could potentially have noise from power sources as well, a power conditioner could help in that case, but it doesn't seem like the most likely candidate. Quote:
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Music: Spotify, Bandcamp Videos: You Tube Channel Books: Hymns for Fingerstyle Guitar (std tuning), Christmas Carols for Fingerstyle Guitar (std tuning), A DADGAD Christmas, Alternate Tunings book Online Course: Alternate Tunings for Fingerstyle Guitar |
#18
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Regarding looking at a meter for power line noise (that 50-60 Hz) have all the audio equipment plugged into the
same outlet, not two separate outlets a few feet apart or so. Have mikes plugged into the inputs you are listening to so as to not have open loop noise.
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Derek Coombs Youtube -> Website -> Music -> Tabs Guitars by Mark Blanchard, Albert&Mueller, Paul Woolson, Collings, Composite Acoustics, and Derek Coombs "Reality is that which when you stop believing in it, doesn't go away." Woods hands pick by eye and ear
Made to one with pride and love To be that we hold so dear A voice from heavens above Last edited by rick-slo; 09-26-2020 at 12:02 AM. |
#19
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Are you sure you're not getting noise from a ground loop?
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Patrick 2012 Martin HD-28V 1984 Martin Shenandoah D-2832 2018 Gretsch G5420TG Oscar Schmidt Autoharp, unknown vintage ToneDexter Bugera V22 Infinium |
#20
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I shot these real time analyses of my living room for you last night and this morning on a quick and dirty RTA I have on my iPhone. Last night I left the ceiling fan on but it is a nice Hunter hung nine feet up, halfway between floor and ceiling. I hung and balanced it myself and from my location the slow speed it was set to is below the threshold of hearing. This morning I turned off the fan and shot the RTA again. The times are at the top of each, with last night's on the left. Pardon the slight scale offset due to me fooling with the zoom.
The conditions: my house is on a boulevard in a suburb and is located about a half mile from a major interstate highway. I waited until there wasn't a car passing and the heat pump had cycled off. The app says it is self-calibrating to your particular iPhone model's mic response but not to the specific mic. I noticed that whenever I attempted to pause the screen for a screen shot by pressing the on-screen icon the low-end tilted up and the overall noise level showed about 3-4db higher, presumably from handling noise. My guitar callus made it hard to activate the pause! The dogs and I held our collective breaths. Sort of. The 5db of reduced noise from turning off the fan, mostly showing in the low end, can be fixed with a mic's roll off. I could hear power equipment in the next neighborhood and the flow noise from the interstate highway that are reflected in the low end of the graph. What strikes me is how similar the noise is between night and morning. Bob
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"It is said, 'Go not to the elves for counsel for they will say both no and yes.' " Frodo Baggins to Gildor Inglorion, The Fellowship of the Ring THE MUSICIAN'S ROOM (my website) |
#21
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Hey Bob,
Thanks for the RTA captures. It’s nice to have a real comparison. My room noise is similar (I did not use a RTA to get SPL, but I calculated it to be 43dB SPL at 60Hz). If I set my HPF at 75Hz I can bring it down to about 37dB SPL.
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Chuck 2012 Carruth 12-fret 000 in Pernambuco and Adi 2010 Poling Sierra in Cuban Mahogany and Lutz 2015 Posch 13-fret 00 in Indian Rosewood and Adi |
#22
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Quote:
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Chuck 2012 Carruth 12-fret 000 in Pernambuco and Adi 2010 Poling Sierra in Cuban Mahogany and Lutz 2015 Posch 13-fret 00 in Indian Rosewood and Adi |
#23
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In my current (literally bedroom and no treatment ) set up, ambient noise has become more of a factor, especially since I had to go to a fan driven metal capable,Graphics card in my older Mac Pro to be able to upgrade to Mojave.
And it is definitely visible on the meters in my DAW. Here is a real world example. A music video I shot last winter , obviously it is not an acoustic guitar solo so perhaps not near as critical ? BTW the first sound on the video is actually my acoustic still resonating a bit , I did not mute it or wait long enough before starting the video and my count in (typical rookie) In this Video the mic/s are about 6-7 ft. from the computer. I have a GIK 2' by 4' by 5 1/2" thick bass trap, standing in front of my Mac Pro so it sits in the direct line of sight from computer to mics which helps some . I am relatively new to playing and recording electric lead, so it is what it is
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Enjoy the Journey.... Kev... KevWind at Soundcloud KevWind at YouYube https://www.youtube.com/playlist?lis...EZxkPKyieOTgRD System : Studio system Avid Carbon interface , PT Ultimate 2023.12 -Mid 2020 iMac 27" 3.8GHz 8-core i7 10th Gen ,, Ventura 13.2.1 Mobile MBP M1 Pro , PT Ultimate 2023.12 Ventura 12.2.1 Last edited by KevWind; 09-26-2020 at 08:57 AM. |
#24
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I agree. I even installed a switch in my self-built PC to turn off the low noise case fans when I record. This brought my noise floor down even lower. I am also lucky to live in a quiet area with no traffic noise. Finally, I make sure to position my cardioid mics so the PC is off axis.
Quote:
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John Tucson, AZ 2020 Kraut 00, Swiss/Brazilian, build 2018 Eady EG Pro Electric, Redwood/Mahogany 2013 Baranik Meridian, Blue Spruce/Cocobolo, build 2008 Baranik CX, Blue Spruce/African Blackwood 2008 Breedlove A20 Masterclass 12-string, Adi/IRW 2003 Thames classical, Euro/Brazilian Fodera Standard 4 Fretless bass, figured walnut |
#25
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Separate issues. Maybe I misunderstood, but I thought you were saying you heard mud in the low end of your recordings, and related to playing notes louder? If your recordings sound unbalanced, that could be room acoustics. If you mean you hear muddy noise when just listening to "silence", then that's some sound being picked up by the mics.
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Music: Spotify, Bandcamp Videos: You Tube Channel Books: Hymns for Fingerstyle Guitar (std tuning), Christmas Carols for Fingerstyle Guitar (std tuning), A DADGAD Christmas, Alternate Tunings book Online Course: Alternate Tunings for Fingerstyle Guitar |
#26
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When room resonance is lowered via treatment the room noise will decrease.
__________________
Derek Coombs Youtube -> Website -> Music -> Tabs Guitars by Mark Blanchard, Albert&Mueller, Paul Woolson, Collings, Composite Acoustics, and Derek Coombs "Reality is that which when you stop believing in it, doesn't go away." Woods hands pick by eye and ear
Made to one with pride and love To be that we hold so dear A voice from heavens above |
#27
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Thanks for all the information everyone!
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Chuck 2012 Carruth 12-fret 000 in Pernambuco and Adi 2010 Poling Sierra in Cuban Mahogany and Lutz 2015 Posch 13-fret 00 in Indian Rosewood and Adi |