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#1
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
Hello!
A background (about 50hz) rumble appears in a sound from microphone. Windows XP SP2. I tried two headsets (which surely are good). The rumble decreases if I touch the computer case. I checked the inside of the case, did not find any improper contacts. The sound card is Creative sound blaster live ct4830. I tried the latest Microsoft and Creative drivers. The Creative driver does not output sound from microphone to speakers at the same time, but only from a recording from the microphone. How to prevent the rumble? Best regards, Dima |
#2
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
"D" wrote ...
A background (about 50hz) rumble appears in a sound from microphone. Windows XP SP2. In common use, "rumble" applies to low frequency *random noise* such as from an air duct or a subway train or from a distant highway. If you are hearing interference from your power mains (presumably 50Hz if you are posting from Russia), that is called "hum" and it is a very *constant* tone. We will assume that you mean that you are hearing interference from power-line hum. If it is *rumble*, then it is acoustic and you should be able to hear it with your ears, no headset, no computer. I tried two headsets (which surely are good). The rumble decreases if I touch the computer case. I checked the inside of the case, did not find any improper contacts. The sound card is Creative sound blaster live ct4830. I tried the latest Microsoft and Creative drivers. The Creative driver does not output sound from microphone to speakers at the same time, but only from a recording from the microphone. How to prevent the rumble? Does it hum when no headset is plugged in? If so, then there is a problem with the computer or sound card. If no, then *both* of your headsets have a problem Does the hum change when you move the headset around the room? Does it hum when you try using a differen computer mic? rcrowley posting from rec.audio.pro |
#3
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
On Oct 16, 1:45 am, "Richard Crowley" wrote:
"D" wrote ... A background (about 50hz) rumble appears in a sound from microphone. Windows XP SP2. In common use, "rumble" applies to low frequency *random noise* such as from an air duct or a subway train or from a distant highway. If you are hearing interference from your power mains (presumably 50Hz if you are posting from Russia), that is called "hum" and it is a very *constant* tone. We will assume that you mean that you are hearing interference from power-line hum. If it is *rumble*, then it is acoustic and you should be able to hear it with your ears, no headset, no computer. I tried two headsets (which surely are good). The rumble decreases if I touch the computer case. I checked the inside of the case, did not find any improper contacts. The sound card is Creative sound blaster live ct4830. I tried the latest Microsoft and Creative drivers. The Creative driver does not output sound from microphone to speakers at the same time, but only from a recording from the microphone. How to prevent the rumble? Does it hum when no headset is plugged in? If so, then there is a problem with the computer or sound card. If no, then *both* of your headsets have a problem Does the hum change when you move the headset around the room? Does it hum when you try using a differen computer mic? rcrowley posting from rec.audio.pro Thanks Richard Crowley for your explanations! It does not hum when no headset is plugged in. One of the headsets is brand new and checked. Yes, the hum changes when I move the headset around the room: the further from the computer case the louder. Yes, it hums when I try using a differen computer mic: both headsets. |
#4
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
"D" wrote ...
It does not hum when no headset is plugged in. Then you can eliminate any problem with the computer, the sound card, or any software including drivers, etc. One of the headsets is brand new and checked. What does "checked" mean? Do either of the headsets work OK on another computer? Yes, the hum changes when I move the headset around the room: the further from the computer case the louder. I would take a wild guess that it has a shielding or grounding problem. Yes, it hums when I try using a differen computer mic: both headsets. The problem may be with the basic design if both headsets show the same symptoms. |
#5
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
On Oct 17, 1:44 am, "Richard Crowley" wrote:
"D" wrote ... It does not hum when no headset is plugged in. Then you can eliminate any problem with the computer, the sound card, or any software including drivers, etc. One of the headsets is brand new and checked. What does "checked" mean? Do either of the headsets work OK on another computer? Yes, the hum changes when I move the headset around the room: the further from the computer case the louder. I would take a wild guess that it has a shielding or grounding problem. Yes, it hums when I try using a differen computer mic: both headsets. The problem may be with the basic design if both headsets show the same symptoms. Theanks Richard Crowley for your suggestions! The hum is from speakers, not from the case. Yes, either of the headsets work OK on another computer. |
#6
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
"D" wrote ...
The hum is from speakers, not from the case. Yes, either of the headsets work OK on another computer. Then it is possible that the sound card has a problem. Since the sound card feeds power into the microphone in the handset, the filter capacitor on the microphone power may have a problem that is letting 50Hz hum get injected into whatever microphone is connected. You would not hear this unless a microphone was connected. Since the headsets work OK on another computer, that casts the suspicion back on the sound card. |
#7
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
On Oct 17, 1:44 am, "Richard Crowley" wrote:
"D" wrote ... It does not hum when no headset is plugged in. Then you can eliminate any problem with the computer, the sound card, or any software including drivers, etc. One of the headsets is brand new and checked. What does "checked" mean? Do either of the headsets work OK on another computer? Yes, the hum changes when I move the headset around the room: the further from the computer case the louder. I would take a wild guess that it has a shielding or grounding problem. Yes, it hums when I try using a differen computer mic: both headsets. The problem may be with the basic design if both headsets show the same symptoms. Thanks Richard Crowley for your suggestions! The hum is from speakers, not from the case. Yes, either of the headsets work OK on another computer. |
#8
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Soundblaster Live.
The problem is likely caused by the combination of "speakers" being
disconnected by the insertion of the head phones AND the volume knob of the speakers being cranked up rather high. Now the speakers are amplifying the hum of the little power wart. D wrote: On Oct 17, 1:44 am, "Richard Crowley" wrote: "D" wrote ... It does not hum when no headset is plugged in. Then you can eliminate any problem with the computer, the sound card, or any software including drivers, etc. One of the headsets is brand new and checked. What does "checked" mean? Do either of the headsets work OK on another computer? Yes, the hum changes when I move the headset around the room: the further from the computer case the louder. I would take a wild guess that it has a shielding or grounding problem. Yes, it hums when I try using a differen computer mic: both headsets. The problem may be with the basic design if both headsets show the same symptoms. Thanks Richard Crowley for your suggestions! The hum is from speakers, not from the case. Yes, either of the headsets work OK on another computer. |
#9
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
On Oct 17, 1:44 am, "Richard Crowley" wrote:
"D" wrote ... It does not hum when no headset is plugged in. Then you can eliminate any problem with the computer, the sound card, or any software including drivers, etc. One of the headsets is brand new and checked. What does "checked" mean? Do either of the headsets work OK on another computer? Yes, the hum changes when I move the headset around the room: the further from the computer case the louder. I would take a wild guess that it has a shielding or grounding problem. Yes, it hums when I try using a differen computer mic: both headsets. The problem may be with the basic design if both headsets show the same symptoms. Thanks Richard Crowley for your suggestions! The hum is from speakers, not from the case. Yes, either of the headsets work OK on another computer. |
#10
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
On Mon, 15 Oct 2007 13:34:04 -0700, D wrote:
Hello! A background (about 50hz) rumble appears in a sound from microphone. Windows XP SP2. I tried two headsets (which surely are good). The rumble decreases if I touch the computer case. I checked the inside of the case, did not find any improper contacts. The sound card is Creative sound blaster live ct4830. I tried the latest Microsoft and Creative drivers. The Creative driver does not output sound from microphone to speakers at the same time, but only from a recording from the microphone. How to prevent the rumble? Is "rumble" a precise term or are we chasing a mains hum? |
#11
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
On Oct 16, 3:34 am, Laurence Payne NOSPAMlpayne1ATdsl.pipex.com
wrote: On Mon, 15 Oct 2007 13:34:04 -0700, D wrote: Hello! A background (about 50hz) rumble appears in a sound from microphone. Windows XP SP2. I tried two headsets (which surely are good). The rumble decreases if I touch the computer case. I checked the inside of the case, did not find any improper contacts. The sound card is Creative sound blaster live ct4830. I tried the latest Microsoft and Creative drivers. The Creative driver does not output sound from microphone to speakers at the same time, but only from a recording from the microphone. How to prevent the rumble? Is "rumble" a precise term or are we chasing a mains hum? Yes, we are chasing a mains hum. |
#12
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
D wrote in
oups.com: Hello! A background (about 50hz) rumble appears in a sound from microphone. Windows XP SP2. I tried two headsets (which surely are good). The rumble decreases if I touch the computer case. IMO, this undoubtedly means you have a ground problem. As if "about 50 Hz" was not enough of a tipoff. It's always 50 or 60. But it MAY just be a totally crappy microphone. Try another one, preferably a good one. If it's NOT the microphone, I am not a technician so I can't tell you how to fix it, but first thing you should do is check that everything to do with you system is plugged into the SAME AC circuit, preferably same outlet with power bar(s), and then you can buy or borrow (or steal I suppose) a little gizmo which you plug into the wall outlet and it tells you if everything's OK. Other than that, ask a technician. I checked the inside of the case, did not find any improper contacts. The sound card is Creative sound blaster live ct4830. I tried the latest Microsoft and Creative drivers. The Creative driver does not output sound from microphone to speakers at the same time, but only from a recording from the microphone. That si impossible. Check your mixer volumes, mutes etc. Watch out for feedback, it can be VERY unpleasant, but no sound card manufacturer will disable mic to speakers direct just because of that. How to prevent the rumble? Best regards, Dima -- Waiting for the day when it is illegal to use anything but Vista on any computer in the world. |
#13
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
On Oct 16, 11:08 am, thanatoid wrote:
D wrote groups.com: Hello! A background (about 50hz) rumble appears in a sound from microphone. Windows XP SP2. I tried two headsets (which surely are good). The rumble decreases if I touch the computer case. IMO, this undoubtedly means you have a ground problem. As if "about 50 Hz" was not enough of a tipoff. It's always 50 or 60. But it MAY just be a totally crappy microphone. Try another one, preferably a good one. If it's NOT the microphone, I am not a technician so I can't tell you how to fix it, but first thing you should do is check that everything to do with you system is plugged into the SAME AC circuit, preferably same outlet with power bar(s), and then you can buy or borrow (or steal I suppose) a little gizmo which you plug into the wall outlet and it tells you if everything's OK. Other than that, ask a technician. I checked the inside of the case, did not find any improper contacts. The sound card is Creative sound blaster live ct4830. I tried the latest Microsoft and Creative drivers. The Creative driver does not output sound from microphone to speakers at the same time, but only from a recording from the microphone. That si impossible. Check your mixer volumes, mutes etc. Watch out for feedback, it can be VERY unpleasant, but no sound card manufacturer will disable mic to speakers direct just because of that. How to prevent the rumble? Best regards, Dima -- Waiting for the day when it is illegal to use anything but Vista on any computer in the world. Thanks thanatoid for your suggestions! I checked my mixer volumes, mutes etc. and did not find anything wrong. I uninstalled the Creative driver. |
#14
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
D wrote:
Hello! A background (about 50hz) rumble appears in a sound from microphone. Windows XP SP2. I tried two headsets (which surely are good). The rumble decreases if I touch the computer case. I checked the inside of the case, did not find any improper contacts. The sound card is Creative sound blaster live ct4830. I tried the latest Microsoft and Creative drivers. The Creative driver does not output sound from microphone to speakers at the same time, but only from a recording from the microphone. How to prevent the rumble? Best regards, Dima What are you recording, I know you state form a microphone, but are you plugging in something else into the microphone socket? If so that would be the problem try plugging it into the line in socket. If it is a microphone then make sure that it is being fully pushed home, if it is then try another one (they aren't exactly expesinve). Others have mentioned ground loops etc, but try the easy bit (normally the cheapest bits) first. As a matter of fact I get a continual low level 50hz hum from my line in post unless I actually plug something into it then it dissapears, so you could also try turning off all ports you are not using before doing your recording. |
#15
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
On Oct 16, 2:06 pm, "kráftéé" wrote:
D wrote: Hello! A background (about 50hz) rumble appears in a sound from microphone. Windows XP SP2. I tried two headsets (which surely are good). The rumble decreases if I touch the computer case. I checked the inside of the case, did not find any improper contacts. The sound card is Creative sound blaster live ct4830. I tried the latest Microsoft and Creative drivers. The Creative driver does not output sound from microphone to speakers at the same time, but only from a recording from the microphone. How to prevent the rumble? Best regards, Dima What are you recording, I know you state form a microphone, but are you plugging in something else into the microphone socket? If so that would be the problem try plugging it into the line in socket. If it is a microphone then make sure that it is being fully pushed home, if it is then try another one (they aren't exactly expesinve). Others have mentioned ground loops etc, but try the easy bit (normally the cheapest bits) first. As a matter of fact I get a continual low level 50hz hum from my line in post unless I actually plug something into it then it dissapears, so you could also try turning off all ports you are not using before doing your recording. Thanks kráftéé for your suggestions! I checked with brand new headset - the same. |
#16
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
D wrote in
oups.com: Thanks kráftéé for your suggestions! I checked with brand new headset - the same. Sounds like it's not the mic, but you may have a short of some kind or ground loop in your headphone connection. If the headphone connection is at the front of your machine, a technician has to check it. If it's a jack on the soundcard, you can remove the sound card and take it to a technician without having to take the whole computer over there. -- Waiting for the day when it is illegal to use anything but Vista on any computer in the world. |
#17
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
On Oct 17, 1:55 am, thanatoid wrote:
D wrote groups.com: Thanks kráftéé for your suggestions! I checked with brand new headset - the same. Sounds like it's not the mic, but you may have a short of some kind or ground loop in your headphone connection. If the headphone connection is at the front of your machine, a technician has to check it. If it's a jack on the soundcard, you can remove the sound card and take it to a technician without having to take the whole computer over there. -- Waiting for the day when it is illegal to use anything but Vista on any computer in the world. Thanks thanatoid for your suggestions! |
#18
Posted to rec.audio.pro,rec.arts.movies.production.sound,24hoursupport.helpdesk,rec.audio.pro,microsoft.public.windowsxp.general
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A background rumble appears in a sound from microphone in Sound blaster Live.
D wrote in
ups.com: On Oct 17, 1:55 am, thanatoid wrote: D wrote gr oups.com: Thanks kráftéé for your suggestions! I checked with brand new headset - the same. Sounds like it's not the mic, but you may have a short of some kind or ground loop in your headphone connection. If the headphone connection is at the front of your machine, a technician has to check it. If it's a jack on the soundcard, you can remove the sound card and take it to a technician without having to take the whole computer over there. -- Waiting for the day when it is illegal to use anything but Vista on any computer in the world. Thanks thanatoid for your suggestions! You're welcome and good luck. Check if a new sound card isn't cheaper than fixing yours! Creative is basically OK and ultra-compatible although perfectionists complain about the sound/specs. M-Audio if you're a musician or have very good ears. Turtle Beach is pretty good too if you can find one. -- Waiting for the day when it is illegal to use anything but Vista on any computer in the world. |
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