Franctir Posted September 16, 2021 Report Share Posted September 16, 2021 Hi everyone, I got a serious problem, anyway maybe i'm wrong please forgive me, not so much experience as some of you got. I've just bought a DPA 4017c, and i got a lot of "sort of" rumble noise (link below) Booming is so hard, i can't even follow someone without making any noise. My old 416 was ok, and i'm trying my best to boom smoothly. i changed my cables, plugin on another input, tried it on a regular rycote Inv 7 suspension, on a Cinela Pianissimo one. Can't get rid of it. Any suggestion? Thanks for your help Lucas 1521829654_DPA4017rumble.WAV Quote Link to comment Share on other sites More sharing options...
Rick Reineke Posted September 16, 2021 Report Share Posted September 16, 2021 Engage the HPF (high pass filter). A good shock mount and wind protection you 'should' already have. Quote Link to comment Share on other sites More sharing options...
Franctir Posted September 16, 2021 Author Report Share Posted September 16, 2021 HPF is already engaged. Just forgot to say that the wav file i've uploaded is not in booming condition, i moved a bit more my shockmount so you can hear on the left ear the noise i can't get rid of. I never had this kind of problem moving, even running with my 416 and already rent some DPA 4017b or 4018 and never had this kind of random shock noise. Anyone got a 4017c, and can confirm i'm just the worst boom operator in the world Anyway thank you for your answer Rick! Glad i've found such a wonderful forum. Cheers Quote Link to comment Share on other sites More sharing options...
mikerobertson Posted September 17, 2021 Report Share Posted September 17, 2021 it doesn't seem like a high pass is engaged at all. Both channels have a lot of bass in them, the left one is through the roof, right is still higher than normal. Is the mic naked? why is one track mid, and the other side? The sound file is very confusing. Quote Link to comment Share on other sites More sharing options...
Franctir Posted September 17, 2021 Author Report Share Posted September 17, 2021 Sorry if the sound file is confusing. My mistake. The mic is inside a Cinela Piannisimo, in a MS configuration 4017c+schoeps CMC 1U Mk8 figure 8 capsule. 40 Hz -18db/oct on both channel (sure it's not enough) Should i raise my HPF to something like 60hz+? Still learning (and that's what i love in sound... always a learning curve) Thanks Quote Link to comment Share on other sites More sharing options...
Naga Posted September 17, 2021 Report Share Posted September 17, 2021 The image below is a spectrogram of your sample sound. As you can see, the high-pass filter is not working. It causes the bass to clip and the limiter to be working. I think you should first make sure that the HPF setting is correct. Quote Link to comment Share on other sites More sharing options...
osa Posted September 17, 2021 Report Share Posted September 17, 2021 Forgive me if I am wrong but the 4017 C does not have rolloff capabilities at the mic? I.e.,the 4017b you can low cut at the source before hitting your mixer? Curious if that’s why you had success with other mics Quote Link to comment Share on other sites More sharing options...
Shastapete Posted September 17, 2021 Report Share Posted September 17, 2021 2 hours ago, Franctir said: 40 Hz -18db/oct on both channel (sure it's not enough) Yeah, that setting is basically useless. I'd start at 60Hz and move it up until you like the sound. Mine usually sits around 80Hz, but sometimes with aggressive booming, windy conditions, or whatever else I've even had it up at 120Hz – when I did post mixing, I'd always throw another low cut on killing everything below there anyways Quote Link to comment Share on other sites More sharing options...
mikerobertson Posted September 17, 2021 Report Share Posted September 17, 2021 Dang, thats gonna be a nice M/S rig once you work out the kinks! I keep my low cut at 80 Hz as well. That amount of distortion is weird for it sitting in wind protection though. Let us know if you manage to solve the issue. Quote Link to comment Share on other sites More sharing options...
Franctir Posted September 20, 2021 Author Report Share Posted September 20, 2021 Thanks everyone, i'll follow some of your advices next week, coming back to tell you if it's better. Have a nice day Quote Link to comment Share on other sites More sharing options...
cineli Posted September 24, 2021 Report Share Posted September 24, 2021 Let me confirm the major difference between the C preamp and the B one: No filter at all on the C. The B integrates a hidden 3rd order filter (+18dB/oct) at 50Hz, not talking about the ring one. Basically, the 4017C is a rumble generator. And if that was not enough, a suspension is a rumble amplifier. To be a little simplistic, I have to say that a bad suspension has its resonance in the audible range...and a good one frankly below 20Hz (with HIGH resonance factor). No problem at all if your recorder/mixer integrates a high slope filter (+18 or +24dB/oct) in the input first stage, but take care to digital filters or too smooth ones (+6 or +12dB/oct). Don't be surprised if the limiter reacts ! As a conclusion, the right tool is NOT simply a good microphone and a good suspension, it's a combination between those...and the right filtering. Tell me if I'm wrong and I'll change my life. Quote Link to comment Share on other sites More sharing options...
VASI Posted September 26, 2021 Report Share Posted September 26, 2021 Have you talked about this with DPA? I am pretty sure DPA will help you a lot! Curious to hear their feedback. Best, VASI Quote Link to comment Share on other sites More sharing options...
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