Help me solve a problem

[RedJoker]

I was able to finally reclaim the den and was setting up my mics to record. I have a pair of Behringer C2 mics going into a Scarlett 2i2. The problem is when I record, I here this low frequency rumble:



Anyone know what could be causing this? It only happens when I have both Behringers plugged in. That low frequency rumble goes away with either of the C2s by themselves or with any other mic, dynamic or condenser. Using the low frequency cut-off switch does nothing. I can filter it out a bit in Audacity but I'd rather it not be there in the first place.

I could use any of my other mics to record but I really liked that pair for X-Y.

[Bob1131]

I'm not hearing anything over headphones turned up all the way! There is a very faint noise but, I don't think it would be loud enough to be heard when something is recorded much louder over it. If you are hearing a loud low frequency noise it might be in your play-back circuit and have nothing to do with actual recorded sound.

[sdelsolray]

Self noise in your signal chain. Without a metered reference, it's impossible to say whether that noise is soft, medium or loud.

[RRuskin]

Originally Posted by RedJoker

I was able to finally reclaim the den and was setting up my mics to record. I have a pair of Behringer C2 mics going into a Scarlett 2i2. The problem is when I record, I here this low frequency rumble:



Anyone know what could be causing this? It only happens when I have both Behringers plugged in. That low frequency rumble goes away with either of the C2s by themselves or with any other mic, dynamic or condenser. Using the low frequency cut-off switch does nothing. I can filter it out a bit in Audacity but I'd rather it not be there in the first place.

I could use any of my other mics to record but I really liked that pair for X-Y.

If it only happens when both mics are plugged in, I would suspect the phantom supply can't supply enough current for both mics. Try an outboard supply for one or both microphones to see if the rumble goes away.

[RedJoker]

Originally Posted by RRuskin

If it only happens when both mics are plugged in, I would suspect the phantom supply can't supply enough current for both mics. Try an outboard supply for one or both microphones to see if the rumble goes away.

Hmm... I'll see what I can do. I'll also try to redo the recording with something to guage it with. Guess I didn't think of that!

[RedJoker]

I accidentally left everything on all night and when I tried to make a new recording this morning, there was no noise. I don't know that I fixed everything but maybe the mics needed to just sit there and think about what they've done.

weird...

[MikeBmusic]

Originally Posted by RRuskin

If it only happens when both mics are plugged in, I would suspect the phantom supply can't supply enough current for both mics. Try an outboard supply for one or both microphones to see if the rumble goes away.

That's very possible. Is the Scarlett USB-powered or does it have a wallwart? If USB, your cmoputer may not be providing enough current to the Scarlett for 2 condensor mics - if it happens again, unplug any other USB devices that are connected (except keyboard and mouse, of course).

[Ty Ford]

Originally Posted by MikeBmusic

That's very possible. Is the Scarlett USB-powered or does it have a wallwart? If USB, your cmoputer may not be providing enough current to the Scarlett for 2 condensor mics - if it happens again, unplug any other USB devices that are connected (except keyboard and mouse, of course).

Yes, low power to a mic can do this. I definitely hear the noise. Maybe the interface only offers 12 or 24 V DC phantom or not enough mA to power both mics at the same time. Whether or not that's the reason or not is hard to say. Is this a single family home or is it attached? If attached, could it be coming through the walls and foundation from elsewhere.

Regards,

Ty Ford

[RedJoker]

Originally Posted by Ty Ford

Yes, low power to a mic can do this. I definitely hear the noise. Maybe the interface only offers 12 or 24 V DC phantom or not enough mA to power both mics at the same time. Whether or not that's the reason or not is hard to say. Is this a single family home or is it attached? If attached, could it be coming through the walls and foundation from elsewhere.

Regards,

Ty Ford

I think you are on to something here. It's definitely an electrical issue and the interface can handle one of these condensers and a dynamic. As I mentioned above, it was gone this morning. One thing that was different is that I plugged it into a USB3 port instead of USB2. I believe the USB3 standard requires a higher power rating.

Anyway, it seems to be gone so I'm happy now.