Help needed - Acoustic Treatment (Bedroom Mix/Tracking Room)

Hi Everyone, I have read the forums for years, but this is my first post. I have a small setup at home. In the blue mountains, west of sydney. USE OF ROOM: I'm a composer and musician. I write record a variety of music for soundtracks and albums, from a spare bedroom in my rented home. I don't work at high volume levels. And my neighbors are not concerned with noise. So isolation and soundproofing are not necessary concerns for me. I've just moved into a new space and I'm interested in getting the room treated to sound as great as it can - for tracking (vocals, acoustic guitars, electric guitars, mandolins etc.) and mixing. The problem for me is I rent the house I'm in, so permanent structures or anything heavy is not an option. I'm basically looking to create portable solutions that i can take with me when i move. It would be great to get diagrams of how best to set the room up, and advice on where to place my existing panels, and what else to build etc. ROOM DIMENSIONS/ BUILD MATERIALS: The house is a modern build, plasterboard internal cavity walls (no insulation) and the exterior is a single brick layer. My room has 2 external walls, and 2 internal walls (marked on pic. 1) Dimensions and details of the room are marked on Pic. 1 & Pic. 2 There's also a built-in wardrobe along one wall. i have marked the internal dimensions. This would be useful storage for me, but i could pack the cavity with tontine if need be. unfortunately the doors have to stay on and are hinged not sliding. It's not a symmetrical room, so i need as much help as possible :) All measurements are metric. EXISTING PANELS: A. I've built super chunk corner traps before, which helped a lot and I still have them so I can use them for some corners. B. I've also previously built and used four light weight metal framed broadband absorber panels, which hang on 3M hooks separated from the walls by spacers (cheap real traps); and have used these with good results. (see Pic 3, Pic 4 & Pic 5) I can build a lot more of these if they're needed. Would these be good clouds? they are very light and easy to hang. C. I have been using a bookcase as another freestanding absorber: I filled it with tontine and wrapping with breathable cloth. (see Pic. 6 & Pic 7) I use them for partitioning off a vocal space. I also thought I could line several alongside each other up to act as internal wall structures?? BUDGET: My budget is around $500 AU - but the sound is important so, i'm happy to spend more to meet the brief if need be. Please let me know if u need more detail or Pics. Thanks for any and all help. I'm looking forward to hearing from you all.

i would center the mix desk on the long exterior wall. placing the absorbers around the room and overhead on first reflection points and the entry door. one option might be to make several book cases to be gobos between the wardrobe and entry door wall - a pseudo wall with spaces between the bookcases to allow the sound to enter the wardrobes. and be moved when needed. adding a cloud will definitely help. scattering absorption is more effective on the walls and ceiling than blanketing them. using the superchunks in the corners (and use wall-ceiling corners as well) is good idea. if things start getting too dead, consider some plywood panels over the corner traps and various places in the room in order to keep HF alive.

thanks so much for your reply gullfo :) i really appreciate it. just learnt to use sketchup. so the model's a bit rough and measurements aren't exact. i'll have to measure out first reflection points, so i'm just guessing the panel positions atm. Here's a few questions: 1) is this on the right track? 2) would u place traps in each of the wall-ceiling corners? 3) is placing traps in the floor/wall corners as effective as wall-ceiling traps? should i mix between the two? 4) i was thinking of hanging curtain over the windows and then hanging the trap/s on that side... is that overkill? thanks so much for your help

i think that's a really good start. yes, the drapes could help cull off some HF. i'd balance that with a matching drape at least on the sides of the listening position. maybe double up (side-to-side) the front angled and overhead absorbers.

Hey Glenn, Thanks for your advice - it's so helpful. i've added a cloud to go above the mix position which is 1800mm x 1200m. And I've closed the gap between the two panels behind the desk. I've added two wall/ceiling traps Left and Right of the room. I also decided to use 2 more (bookshelf) gobos at the first reflection point on either side of the mix desk - as it's easier to place in front of the 1st window; and only 1 set of drapes (in front of the second window and on the opposite wall) is this all ok? what improvements can i make now? Also: i have a few questions about the corner traps: 1) would you suggest using floor to ceiling super chunks (with acoustisorb 2 100mm thick)? or can i use bradford soundcheck R 2.5 (88mm thick)? i've seen the spec sheets which say it's 40kg/m3 - is that right???? 2) or would you suggest using panel traps with acoustisorb3 which sit diagonally across the wall with an air gap behind. if so which thickness do i go for? 50mm, 75mm or 100mm thickness thanks again Pete

looks good! i would go with the acoustisorb 3 as it's 48Kg.m3 and make it super chunk.

awesome! thanks for your help. i'll let u know how it goes