Technical Insight

into FS Studio A

Below there to the millimetre exact (+-0.25mm) are plans of the room, it's setup and it's mathematically calculated reflections.

The 100 rays are traced on first reflection order with an absorption coefficient of 0.01 which is usual for painted concrete walls @<=500 Hz.

Dimensions

Studio A might be small but it's been optimized for more than a year to deliver the best sound possible.

3x4

m

Studio Size

2.5

m

Ceiling Height

12

sqm

Studio Area

30

sqm

Room Volume

Above's plans construct an ideally angled room that does not exist in reality. Studio A's walls are both vertically variable (means they are not perfectly 90° angled to the ground, nor perfectly straight) neither are the room corners at a perfect 90° angle.

As a result the plans above are approximations that introduce minor deviations in the end result.


Wait, there's even more to see!

Studio A has been precisely measured
via the open-source REW Measurement Program

Date: 27.10.2021
Air: 23.4°C Temperature @54% Humidity
REW Levels +-10cm around the listener spot checked via HS7s only: 75(1) - 79dB(2) max
- (1) SPL Meter pointed towards speaker membranes
- (2) SPL Meter pointed towards center(middle) between both speakers

Calibrated Accuracy: +-1.5dB @1K _ A weighted
Within REW: +-2dB SPL Calibrated

Measurement Microphone: Sonarworks XREF 20 ID:36A552

REW State:
Interface @192kHz, 512 Buffer Size // 44.1Khz for Sonarworks
Loopback: LineL(Mono) to Mic1 (1m) // no Loopback for Sonarworks
SW XREF wired via 5m Mogami Gold XLR to Mic2

Used Levels for Sonarworks Measurements:
- (0) set within program - "loud conversation volume"

DOWNLOAD REW MEASUREMENTS

and analyse the acoustic room quality yourself.

Below you can also download the Sonarworks Ref4 Calibration Files!

It's final calibration conclusion includes much more than the real listening spot.

Measurements were made nearly across the whole room, with a distance of about 1m to walls, from which SW Ref4 calculates an average at the end.

Sonarworks Reference 4 takes a lot of measurements into calculation in order to enhance phase response via a calculated average. Additionally it applies an EQ correction curve onto the speakers in order to make the frequency response more linear.

The final result is a wider sweet spot that deviates less concerning the frequency response for a more linear experience.

In the end however SW Ref4 still can't change overall physics.

So you should still stay within the listeners spot. Checking back on the mix without SW Ref4 at times might be beneficial, too.

In case you missed out on the construction details and

STUDIO PRIORITIES

QUICK ANALYSIS


The frequency response of each speaker at the listener spot is very balanced.
There are some phase issues that e.g. eliminate 72Hz but overall it is good enough.
Time response is aimed to meet the official DIN 15996 (Feb 2006, chapter 4.6.5.2) standard.

41.4Hz is a frequency problem between the front wall and the back wall.
Because of the enormous energy of that bass frequency and having already treated about every available surface (partially with 4 GIK bass traps) with velocity trap absorbers, there is nothing more that can be done about it, if not choosing specifically trimmed membran/resonance absorbers.
41Hz is however EQed down via Sonarworks and other self-created EQ curves that fit the room.

There is a standing wave at 63Hz, mathematically it should be around 69Hz, and is expected between floor and ceiling. Applied treatment makes it decay within less than 0.3s which is totally fine for Studio A's room dimensions in relation to frequency response. It is still within the DIN Norm below. Active Treatment for this frequency: about six square meters of 30-40cm thick Rockwool panels on the floor, four square meters of 10cm thickness at the ceiling, along with 4 GIK bass traps, 4 AddictiveSound Bass Traps together with several 12cm AddictiveSound Premium Panels.
The applied Basotect G+ are not adding any useful effect for this frequency.

The room's biggest problem was at 121-125Hz and has been successfully fixed.
More about how that specific frequency has been treated: here.

STUDIO A meets overall requirements for DIN 15996's
Studio Norm

~38-45Hz being the only exception

https://amcoustics.com/tools/amrev/#/diagram

Setup Overview

Everything in pure numbers


Room Dimensions:
Width: 3,05m (not perfectly symmetrical)
Length: 3,905m + 19cm Windows - 34cm* Closet (*partially -5cm)
Height: 2,48m

Best Bass Response:
Centered
@ 166-175cm to front
@ 125-135cm to floor

Final Listener Spot:
(ear position)
@172-174cm to front
@130,3cm to floor

Meeting point of speakers:
181.5cm from front

Setup:
Speaker Set A: Yamaha HS7 @+4dB:
Speaker Set B: Yamaha Yas-207 @Vol30;
Speaker Support: Temblor T10 @-20dB
real +2dB@Average up to +8dB@41.4Hz;
Crossover: around 64Hz

Speaker Angles have been optimized for listening experience instead of math.
As a result it is not a perfect equilateral triangle.
Left Speaker Angle*:
30.5°+-0.5
Right Speaker Angle*:
30°+-0.5

140cm direct path until Listener Spot (Head of Listener) @ 172-174cm to front.

*relative to the not perfectly straight Front Wall & Window Front.

Reflections

Sonarworks Reference 4 -> average on listener spot +-1,5m (calibration file above: _noSeat)

   

FLAWLESS_SKY STUDIO SERIES

constructed by SILVERSTRIKEZ

Studio A

Studio B

currently deployed technology in FS-Studios

   

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