Key posts: Groundlift Research & Development NEW STUDIO (consolidated)
Substantial posts by Darth Fader, who started the thread, and by the forum’s most active contributors. 56 of 97 posts are listed.
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Darth Fader, 24 April 2018Ok, so making some progress with SketchUp. Couple of questions re: acoustics, size, shape, etc... 1 - From what i gather, every room will have several nodes, areas of…
Darth Fader, 24 April 2018Also: regarding HVAC systems, have you all had any experience with "Heat Reclaim Ventilator" or "Energy Recovery Ventilator" systems? I find it very difficult to find an…
Gregwor, 24 April 2018As many evenly dispersed as possible, yes. Hence Abbey Road being awesome sounding. It's huge. Bigger = lower Schroeder Frequency. Bass traps don't "bring down the worst…
Soundman2020, 24 April 2018"Modes" not "nodes", but yes, basically. Just to confuse you more: Modes can have nodes, but nodes can't have modes! :shock: :shot: Modes are also sometimes called…
Soundman2020, 24 April 2018An ERV or HRV (they are not the same!) can recover a large percentage of the energy that would otherwise go overboard. Very recommendable. But there's also the issue you…
Darth Fader, 26 April 2018OK - again, really really great stuff here! Thank you guys!! What I've learned so far (and then some questions, to follow up) 1 - Yes.. MODES, not nodes.. should have…
Gregwor, 26 April 2018John has stated somewhere that he used to believe that having glass angled from one another would help is isolation, but he doesn't believe that anymore. Maybe you've…
Darth Fader, 26 April 2018Got it. How about that Mass Loaded Vinyl? Would that be a waste of money? Seems like it'd be a simple enough thing to get a few feet of that and cut into strips to put…
Darth Fader, 26 April 2018This is invaluable, Stuart! I really do like (and need) a large control room, and the whole Bonello thing, along with the Golden Ratios really gave me a headache. I can…
Soundman2020, 26 April 2018MLV does some have uses in acoustics, but that isn't one of them! :) The useful things about MLV: flexible, limp, massive. The not-so-useful aspect: Expensive, fragile.…
Darth Fader, 27 April 2018Again, Stuart, great stuff!! when i dream of my new system (what, you don't dream of AC systems?) it has a way to switch over, 100%, to outside air if needed. So... like…
Darth Fader, 28 April 2018Stuart - this is great.. I did the math and it looks like I'm pretty well in the clear. The only area that's close is the height vs width. The place i'm looking at now…
Soundman2020, 28 April 2018Weelll...... There's a problem with that approach. HVAC systems don't just deal with temperature and fresh air: another very big part of HVAC is controlling humidity.…
Darth Fader, 28 April 2018Thanks Stuart. As always, clear and on point! It's all coming together now.. albeit slowly (but that's why I'm here!). I've read a LOT about HRV, and I like what I'm…
Darth Fader, 30 April 2018A lot of reading, the last couple of days.. and Stuart is right, a LOT to learn! One thing that is (still) a mystery to me is the actual placement and _connection_ of…
Gregwor, 30 April 2018Ideally, both your inner and outer leaf silencers should live between the walls. Some people will fully decouple the boxes from the walls and have them sitting on their…
Soundman2020, 30 April 2018It all depends on how much isolation you need, which is another reason for starting out your entire project by defining that: settling on a number: the number of…
Darth Fader, 30 April 2018Greg, Stuart. Thank you for this. This all makes a lot more sense to me now! I read something a while back - from one of you - where we were talking about supply and…
Soundman2020, 30 April 2018:thu: That is, indeed,the way to do it! :) If you could get an actual band together to play in the room, live, with their normal instruments and gear, and tell them to…
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Darth Fader, 30 April 2018Thanks Stuart! this makes a lot of sense - I'll get on it! a day of SPL!! btw.. a lot of research and a lot of calls re. ERV systems, and setups. making good headway.…
Darth Fader, 30 April 2018well, again as with everything: conflicting reports. to be honest, i'm not decided yet. some manufacturers say HRV is mainly for (like the name says) Heat Recovery..…
Soundman2020, 1 May 2018HRV is very simple: it transfers heat from the warmer air stream to the cooler one. That's it. If the warmer air stream is the INCOMING air, then the heat in that stream…
Darth Fader, 1 May 2018Thanks again, Stuart! All good and sensible information in here. It's not a simple thing, navigating the internet. Trying to determine what is needed, what is not - and…
Darth Fader, 3 May 2018Hello again! Is there a general consensus when it comes to bookshelves and DVD / CD shelves as diffusors? I'm starting to jot down some ideas for the layout of things,…
Soundman2020, 3 May 2018Yes: The general consensus is that they don't work! :) You'll only see those "recommendations" from places that don't understand how diffusion actually works (or do…
Darth Fader, 4 May 2018Hello again Stuart and thanks yet another thoughtful reply. really invaluable, all this information!! yeah, of course this is all in the planning stages, still, and who…
Darth Fader, 4 May 2018In talking to HVAC people ("specialists") I'm getting conflicting reports on where to put supplies and where to put returns (believe it or not) What are your thoughts on…
Darth Fader, 4 May 2018Is there ANY way to get sprinklers into the control room and tracking room - through two leaves of our beautifully designed, and acoustically sound, walls - without all…
Soundman2020, 5 May 2018This is actually fairly simple, but so many people get it wrong. Especially even HVAC installers who do ordinary houses / shops / offices / etc, but have no idea that…
Darth Fader, 6 May 2018Great stuff, Stuart. Thank you! (looking forward to some "spirited" conversations with my HVAC guys... :D ) and re: the Sprinkler systems. Amazing! I had no idea this…
Darth Fader, 6 May 2018Hello again doing some math on the HVAC system, wondering if you guys could have a quick look over my numbers, to see if I'm on the right track? (this is for the…
Darth Fader, 7 May 2018Back to the Modes and room tuning theory - for a quick sec. I've done a lot of reading here, and as before, TONS of great info!! I feel like I'm getting a fair grasp of…
Soundman2020, 7 May 2018More or less correct, yes. Technically, the bass trap is an acoustic damper, and yes, one of the jobs it does is to convert sound energy into heat energy. Depending on…
Darth Fader, 8 May 2018Not obtuse at all, Stuart! Quite the contrary.. very helpful! What I've learned so far: 1- Use Amroc (or similar software) to determine - if nothing else - the room…
Darth Fader, 9 May 2018OK - update / mini rant Custom doors are INSANELY overpriced ($9700 for a "sound proofing door" including installation and shipping) So, building my own. (the deadbolt…
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Gregwor, 17 May 2018Your 690 CFM checks out with me. Here's your duct sizing (see bottom of pic) Image not preserved: 700 CFM Duct Sizes.png These are all common residential duct sizes.…
Soundman2020, 17 May 2018There seems to be some big confusion here: You do NOT need such low flow velocities inside the silencers: the oft-quoted 300 fpm figure is for the air velocity at the…
Darth Fader, 17 May 2018Howie As Stuart pointed out, earlier in this thread, most HVAC guys will not know the first thing about studio HVAC design . The key to your (our) success would be - as…
Darth Fader, 17 May 2018This is good stuff, Stuart! Thanks for chiming in. So, that begs the question: with 4 (for example) registers in a control room, roughly 20x30, would it make sense to…
Soundman2020, 17 May 2018Think of it this way: there is a direct, unbreakable relationship between the air flow velocity, the air flow rate, and the duct cross section. Since the AHU fan will be…
Soundman2020, 18 May 2018There can be enough, if you do it right. I often extend a long "sleeve" from the silencer box (which is in the air gap above the ceiling) down through the ceiling, then…
Darth Fader, 2 September 2018Hello Team! long time.. finally closed escrow, and am moving forward with the studio quick question, if you'd allow me: most of the walls (all, probably) will be of the…
Soundman2020, 2 September 2018Congrats on closing! That's good news. Only two things: 1) More mass on each leaf. 2) Larger air gap between the leaves. Either one, or the other. Or both. You cannot…
Gregwor, 2 September 2018To add to what Stuart mentioned, - all of your ISO booths have doors right in the corners of the rooms. This is where you're going to need bass traps. Small rooms like…
Darth Fader, 2 September 2018Hey!!! thanks for this.. so, more space, more mass good to know i'll take the other points into consideration, for sure and like i said, it's a work in progress this…
Darth Fader, 4 September 2018Hello again! Quick question: Do you guys have any experience with any of that "underlayment" for hardwood floors? A lot of "soundproofing" companies sell this stuff (MLV…
Darth Fader, 5 September 2018PS - spoke with an acoustics guy on the phone today, about walls and air gaps and stuff. He said 4" of insulation on either side is the way to go. No matter what the air…
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Soundman2020, 5 September 2018Then take care what other advice you take from him! Since he is flat wrong on that one, he might be wrong on other things too... ... or do the math, and convince…
Darth Fader, 23 May 2019Hello again! long time... quick question: looks to me (according to F. Alton's book, for example) that some sort of FELT underlayment is about as good as it gets, when…
Darth Fader, 30 May 2019Hello Dan and thanks for this yeah, i wasn't really expecting it to add much, to be honest. more along the lines of: since i have to add _something_ under the hardwood…
Darth Fader, 22 June 2019TEAM: i'm building some enclosures for the mic panels in the studio wonder if i could get your input on that? typical double walls, double drywall, etc. cables will be…
Darth Fader, 29 June 2019OK... framing if officially done!! Tracking room, Control Room and 3 Iso booths! ONE QUESTION: My original plans (and concept) called for ALL power in the studio to be…
Soundman2020, 30 June 2019:shock: I find that REALLY hard to believe! Plus, STC is a really lousy way of measuring studio isolation anyway... :) But even considering the serious deficiencies of…
Darth Fader, 30 June 2019Hey guys.. thanks for this. Yeah, i decided to keep the columns exposed, for aesthetic purposes, as opposed to acoustic purposes. I like the look of them, and the detail…
Soundman2020, 30 June 2019Time for a "blunt and to the point reality check:" If you have your outer leaf INSIDE the room (pillars exposed), and your inner leaf walls connected to both ceiling and…
Darth Fader, 24 December 2020Team! Made it this far - ready to do some listening. Acoustic treatments are done - first round anyway. Thank you all for your help.. this forum has been a wealth of…