This is a new MIC, I'm afraid to guess at it and sit here and pick at something all night tring to get it to move. is brought closer to the sound source. there is a s and m and i could take the time and listen tot the differnce but i am too lazy, can some just tell me really fast or give me a link. A high pass filter does exactly what it says, it pass the highs through while cutting the lows on a slope. By the time you hit 60 Hz you may be at 3 dB. can anyone help me find a link with a description of the sennheiser md 421 II roll off switch. I'm assuming the switch is in the back, but where exactly? To enable this, you must first check the Use advanced keyboard shortcuts checkbox under the My Settings tab of the Sidebar. The second time I repeat the phrase in a segment is when I turned on the mic roll off. How do people use this mic for radio broadcasts? It is normally designed to compensate for proximity effect - ie: the increase of the bass frequencies as a directional mic. When I switch on the mic’s bass roll off, the sound immediately gets more like what I hear listening to NPR. (It’s not an exact match, but it’s what it makes me immediately think of.) eightsonstudio Guest. Topgear. If the mic sounds good and the level of hiss/hum is acceptable, don't worry about how high you have to crank the preamp gain. I think I like that sound from this mic, but I usually just do everything in post. For example, this roll off may start as high as 100 Hz to 200 Hz at a 1 dB reduction. Yeah you found the switches. Those little slots that an ants finger can't fit through?? I tried using the roll-off switch, that didn't help. Edit: Link to wav recording on SM57b. Shure SM7B Roll Off Switch. Share Reply Quote. Just got a Shure sm57B, which has a bass roll off switch on the mic. A bass roll-off switch (or high-pass filter) removes the lower frequencies. We touched on this earlier, but it’s worth mentioning specific situations where we’d use the bass I can't get any gain out of it without an unacceptable level of noise! A Bass roll off switch on a mic is just a high pass filter. And at 20 Hz and below you may be looking at up to 10 dB of dampening. July 27, 2013 @12:30am. 19th May 2009 #2. I typically use the bass roll off on my mixer for my Blue Yeti Pros. Lives for gear . md421 roll off switch; microphones; pro audio; sennheiser; sennheiser md421; Thread Status: Not open for further replies. At 40 Hz the volume will be reduced by 5 dB. For the Shure, should I use the bass roll off on the mic, the mixer or both? If I EQ the highs out, the mic sounds muddy. Once enabled, the Tilde Key(~), will toggle your microphone mute on and off. Instead, it’s a single press to toggle your mute button on and off. So - switch it *on* if you are close-miking and *off* if you are further away (unless you want to get rid of certain low frequency effects). Filters can come in high pass, low pass and band pass.