One of the more difficult audio problems to deal when we edit and enhance podcast is “that hollow sound” as customers refer to it. They’re talking about the sound of their voice bouncing off of nearby walls, floors and ceilings.
Unless you deal with the problem, the hollow sound is going to remain in your podcasts and you’re going to sound like you’re doing your show in an empty room. We recently had the problem ourselves in a new studio we put together. We didn’t put any acoustical tiles on the walls because the studio is a temporary one. We found an easy solution to dampening the reverberation of our voices, though.
We ordered a couple of blanket moving pads on Amazon from Northern Tool and Equipment,. We hung the blankets around a 6-foot tall by 2-foot wide audio booth we made of PVC pipe we bought at Home Depot. We put a moving blanket we had already on the top as the roof and another blanket on the wood floor for carpeting. This did the trick! We cut out about 99% of the reverb. The total cost was $55 for the PVC, and $53 for the blanket moving pads (including shipping). You can do this much cheaper if you use fairly heavy blankets instead of moving pads and if you have your local hardware store cut the PVC pipe for you. We used pre-cut PVC pipe which is a bit more expensive.
So with a little effort and money, we knocked out the hollow sound and gave our temporary studio a professional sound. Oh, one more thing. If you’ve already got the dreaded “hollow” sound in your recording, we can reduce the reverberation with a technique called de-reverbing. You can learn more about our audio editing and enhancing service at Audiobag.
Recently a customer told us that she was going to record an upcoming podcast at a conference in front of an audience and she wanted to know what is the best way to get a decent recording in a large auditorium. There are several different ways to achieve a good recording.
The best way to get good sound is to take it directly from the house sound system — eliminating the acoustic effects of the room. You’ll want to connect your recorder input cables (left and right channel) to the outputs of the sound system. Adjust the record levels so you don’t record too loud and get distortion. Remember that the output from most sound systems is at line level, not microphone level.
If it’s not possible to connect to the house sound system, you can mike the guests with your own gear (or equipment you rent). I suggest you mike each guest separately. You’ll need several microphones, mic stands, pop filters, and a mixer. Place the mike within 24 inches of each guest. Plug each mike into a separate channel on your mixer.
You can buy (or rent) a mixer at most musical instrument stores. For example, a Zoom R16 or R24 Multitrack Recorder might work nicely for your needs. You’ll have a mixer with mike inputs on the back for each guest microphone and a recorder all in one piece of equipment.
When you finish recording your podcast and need a little help cleaning it up (coughs, bloopers, long pauses, etc.) and turning it into a polished podcast, check out our audio editing and enhancing page at https://audiobag.com/audioediting.html. Meanwhile, good luck with your recording.
We’ve edited and enhanced many podcasts through the years and the biggest problem we hear in the recordings we enhance is the lack of good room acoustics. “Room acoustics” is simply how the room sounds once you turn on your microphone and start talking. Most podcasters don’t realize one very simple trick will drastically improve the sound of their podcast.
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