A noise problem with Tascam uh 7000 + rode nt-1 + mac os.x Yosemite 10.10.3 + logic

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papatoetoe

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Hello Fellows, I am new to this forum, I am glad a site like this exists, cause I have a problem that bothers me a lot and I hope I can get some help from here!

I am using a mac, os.x Yosemite 10.10.3, recording with logic pro x 10.1.1
my recording interface is Tascam uh-7000 and I am using condenser microphone which is rode nt-1.

When I just bought my Tascam and Rode, I had my friend came over to test them out with me. On that day, the recording went well, we are both pleased with the quality of theirs. So as my friend left, I put the interface and microphone back into their boxes for a few days. Until I am all available to set them up in my room, which is today.

However, when I plugged them all on, ready to record. I notice that there is a weird radio wave like noise going on thru my headphone which did not occur the other night when me and my buddy first test them. This noise only occur when the phantom power is on with the mic plugged in, If I switch the phantom power on without the mic plugged in, the noise will not show.

I am not sure whether if it is the mac, tascam uh-7000, or rode nt-1 is having a problem, can anyone help? Much appreciated!


Papatoetoe
 
Since the problem only occurs when you activate the phantom power, it may be a mic problem, but first thing to do is try a different mic cable. Does your friend have one - and a different mic - that you can borrow to try out?
 
Hello mjbphotos and Arcaxis and thanks for your replies!

Yes, I did try different cables and plug them into different channels as well.
I tried recording in my room, and move the devices to the living room but the result is the same.
I adjust volume with the knob on Tascam, basically place it at 12 o'clock, I suppose it is not such a high gain setting or is it? I also tried place the volume knob low and then turn the phone knob high (I am using a headphone) but then this high-gain noise appears in my headphone. However, the noise does go off when the gain is turned down, but then I can barely hear my voice.

The noise is very weird, I have listened to some of the noise problem file with Tascam in the site, those noise are more sound wise stable, the noise I have changes all the time, it is like if someone is talking on the radio program or something like that, it moves like wave in the sea.

I think the noise quality does not change much when I change things on my computer monitor, but I will listen to it more carefully again. I shall meet up with my friend today or the day after, he is gonna lend my another mic and cable to try out. I shall record a sample of the noise and post it on real quick.

Thanks again, much appreciated!

P
 
Hello Mark, what you are saying is really really convincing, cause from where I live, Taipei Taiwan, is rather a humid place. I just put the mic into a plastic bag with seal on it, and I happened to have desiccant packs around. I put four of them in the bag. Hope this will work. I will let you know the result!

Thanks again!

P
 
Did the mic come packed with a small silica Gel bag in the box? If so put this in the plastic bag with the mic when storing. If not try to get hold of a bag, it comes packed with sensitive electrical equipment for removing condensation in humid environments. Info Link.

Alan
 
View attachment noise.mp3

Hello folks, thanks for all your replies!

Armistice, I am using headphone only, have not got myself of a pair of monitor speakers yet.
Witzendos, Rode does not pack any silica gel bag with the mic. I got my bags use to keep the nuts dry that came along within the bag that packs the nuts.

Mark, I think to noise problem gets a little better today, it is kinda bearable now, however I wish to continue with the drying method for a bit more to see if it gets any better. Perhaps I should get some new silica gel bags? Anyway I have recorded a sample of the noise I have been talking about. See if you are familiar with this.

Thanks again all, your kindness of answering me really helps!

P
 
We used to say to people in humid environments that if you have a clothes storage area with a warmer put the mics in there for a while.

Where are you in the world?

Alan.
 
Hi Mark, that is a very cool technic, I will try that out too.
I tried recording with my rode nt-1 today for a few hours, and I end up not being able to stand the noise anymore and I noticed sometimes the noise gets in the way during recording. It kinda "moves" with its volume being slightly louder for a moment or two. I guess I am just gonna put more silica gel bags to pack with the mic for a day or two. And if the condition does not change, I will send it to rode to see if they can repair. Or maybe you have any other suggestion?

Alan, I live in Taiwan. It is a small island near China and Japan. Taiwan is the first democratic "country" in Asia. I use the quote mark because we still have problem with China but oh well never mind the political craziness.

You guys have a nice day!

P
 
I have not been to Taiwan, but I have travelled to a few countries with high humidity, Singapore springs to mind. What happens is that you will have the gear outside in the humidity and then carry the gear into an air-conditioned room. There is a sudden build up of condensation on the gear. Even in the north of Western Australia we have this problem and when on tour it is not uncommon that during the short walk between the accommodation and the venue instruments will sweet some condensation when the temp is +35 Deg C and 80 to 90% humidity.

Humidity on a mic Diaphragm can cause a lot of noise problem.

Alan.
 
That's crazy. I guess I also need a real case or something to store the mic then.
 
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