JPPA 2002 THX pm3 Seminar

JPPA 2002 THXpm3 Seminar
by Masataka Nakahara
1st June 2002
pp. A - 1
© 2002 SONA CORPORATION.
JPPA2002_THXpm3
JPPA2002_THXpm3
Greeting from SONA
THXpm3 project and SONA
thinks about the multi-channel studios.
thinks about the multi-channel studios.
THX and Lucasfilm are ©Lucasfilm Ltd. & TM. All rights are reserved. Used under authorization.
SONA CORPORATION
2-19-9 Yayoi-cho Nakano-ku Tokyo 164-0013 Japan
P/ +81 3 5350 2621, F/ +81 3 5350 2670
E/ [email protected], [email protected], [email protected]
© 2002 SONA CORPORATION.
1/2
SONA is working for …
thinks about the multi-channel studios.
Copyright 2002 SONA CORPORATION
© 2002 SONA CORPORATION.
Advantages of THXpm3 studios
1/4
thinks about the multi-channel studios.
THX and Lucasfilm are ©Lucasfilm Ltd. & TM. All rights are reserved. Used under authorization.
Acoustic design / Acoustical survey and measurement / Acoustical consultation
Architectural design and construction / Specially ordered furniture design
Technical support for audio makers / Study and research with acoustic lab
pm3 = Professional Multi-channel Mixing and Monitoring
Acoustic design and maintenance program for small / medium multichannel studios
‹
‹
Dealer company of M&K professional loudspeakers
‹
‹
Representation company of Lucasfilm THX®pm3TM program
- SONA is an only international rep. of THXpm3. -
‹
‹
‹
pm3 studio can maintain the accurate monitoring environment which is standardized by DVD-V
(Dolby, DTS) , DVD-A, SACD, DTV etc.
pm3 studio can take the monitoring environment which is tuned by the THX field technician.
pm3 is a tailor-made program which can suit for any physical conditions and any usages of the
studio.
pm3 studio can maintain their monitoring specific without any self-measurement because of the
annual measurement by the THX field technician．
pm3 studio can have the well-matched monitoring environment between sound images and video
images.
pm3 studio can have the several monitoring environment at one site (e.g., both DVD-V and DVDA).
pm3 studio can use “THX®pm3™ Logo”.
e.g., Catalogue of the studio
Credit of an end-roll
DVD-V etc.
Package
Music etc.
THX pm3 (Professional Multichannel Mixing and Monitoring)
is a Studio designing program for a professional multichannel studio.
© 2002 SONA CORPORATION.
2/2
Digest of SONA’s Works
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
THXpm3 Logos etc.
2/4
thinks about the multi-channel studios.
THX and Lucasfilm are ©Lucasfilm Ltd. & TM. All rights are reserved. Used under authorization.
pm3 = Professional Multi-channel Mixing and Monitoring
Acoustic design and maintenance program for small / medium multichannel studios
THXpm3 plaques
THXpm3 Logos
Mixed & Recorded in a
THX® pm3TM Certified Facility
JPPA 2002 THXpm3 Seminar
by Masataka Nakahara
1st June 2002
pp. A - 2
© 2002 SONA CORPORATION.
© 2002 SONA CORPORATION.
© 2002 SONA CORPORATION.
THXpm3 project among Client, THX and SONA
3/4
thinks about the multi-channel studios.
1 / 21
thinks about the multi-channel studios.
THX and Lucasfilm are ©Lucasfilm Ltd. & TM. All rights are reserved. Used under authorization.
pm3 = Professional Multi-channel Mixing and Monitoring
Acoustic design and maintenance program for small / medium multichannel studios
Trading directly
THX
Overview
＄Design, measurement fee
Client
Studio owner
Accounting
＄THX CC4 fee
Agreement papers
Manager
￥Support fee
￥Pre-measurement
Pre-tuning fee
Support of all progresses
Designer
Cooperation
SONA
Pre-tuning, Pre-measurement
Support of measurement works
on site
Field
technician
© 2002 SONA CORPORATION.
© 2002 SONA CORPORATION.
SONA supports THXpm3 project
4/4
Keys of Multichannel monitoring
thinks about the multi-channel studios.
2 / 21
thinks about the multi-channel studios.
THX and Lucasfilm are ©Lucasfilm Ltd. & TM. All rights are reserved. Used under authorization.
L/C/R, SUB
Direct surround
Diffuse surround
pm3 = Professional Multi-channel Mixing and Monitoring
Acoustic design and maintenance program for small / medium multichannel studios
Project flow of THXpm3
planning
Room acoustic
Monitoring system
Constructing
Certificate
Measurement
Tuning
Annual
testing
SONA can supports each or all process
„ General affairs
– Agreement papers, import of CC4, support of a certification measurement
„ Planning
– Acoustic design / consulting, system planning
„ Drawing
– Planning drawings, Working drawings
„ Constructing
„ Measurement / tuning
– Room acoustic, loudspeaker response
Note ! THXpm3 room is certificated only by the THX people (not by SONA).
JPPA2002_THXpm3
Some keys of Multichannel monitoring environment
Loudspeakers’
placement
Time
alignment
© 2002 SONA CORPORATION.
Comb filtering
Haas effect
X-over of sub
Bass
management
Room acoustics
Loudspeakers’ placement
Bass management controller
Monitor flow
3 / 21
thinks about the multi-channel studios.
Main BUS
Multichannel
formats
Jun 1st 2002
Masataka Nakahara
SONA Corporation
thinks about the multi-channel studios.
Rec. BUS
‹
Drawing
Planning drawing
Working drawing
2
3-1
5.1
L R
L R C S
L R C LS RS LFE
To Recorder
VU
Copyright 2002 SONA CORPORATION
Monitor BUS
Proposal
Surround processing
A/D, D/A, Compression
Record spec.
Playback spec.
Multichannel
formats
Loudspeakers’
placement
Master Vol.
Time
alignment
Bass
management
L
R
C
LS
RS
SW
JPPA 2002 THXpm3 Seminar
by Masataka Nakahara
1st June 2002
pp. A - 3
© 2002 SONA CORPORATION.
© 2002 SONA CORPORATION.
© 2002 SONA CORPORATION.
Today’s special
4 / 21
thinks about the multi-channel studios.
L/C/R, SUB
Direct surround
Diffuse surround
Surround processing
A/D, D/A, Compression
Record spec.
Playback spec.
Multichannel
formats
Interchangeability
7 / 21
thinks about the multi-channel studios.
Interchangeabilities
○
△
×
Ultimate
L
Diffuse Surround
Generality
Direct Surround
C
C
L
R
R
L
C
R
Studios
RS
LS
Loudspeakers’
placement
LS
LS RS
RS
Time
alignment
L
Room acoustics
Loudspeakers’ placement
Bass management controller
© 2002 SONA CORPORATION.
thinks about the multi-channel studios.
RS
LS
© 2002 SONA CORPORATION.
5 / 21
L
R
C
R
L
C
R
End-users
Comb filtering
Haas effect
X-over of sub
Bass
management
C
LS
LS RS
Monitoring impressions
8 / 21
thinks about the multi-channel studios.
Small room
Large room
“Hot-spot” listening
“Headphone” images of LS and RS
Large SPL differences
Direct / Diffuse surround environment
- Loudspeakers’ placement -
RS
C
L
C
L
R
R
84dBC
85dBC
Out of area
LS
© 2002 SONA CORPORATION.
© 2002 SONA CORPORATION.
Direct surround and Diffuse surround
thinks about the multi-channel studios.
Diffuse Surround environment
Movie, Postproduction
Direct Surround environment
Music, Rec. ITU-R BS. 775-1
C
L
‹
Advantages
„
precise phantom images
(statical)
‹ Drawbacks
„
Compatibilities between
different monitoring
environments
„
“Hot-spot” listening area
R
SW
LS
L
RS
C
L
R
C
R
SW
LS
RS
Advantages
„
ambient, fly-over
(dynamic)
„
Robust, generality
‹ Drawbacks
„
Ambiguous
phantom images
R
L
θL,R = 30°
Δd = 250mm
R
+250mm
θLS,RS = 110°
1m < r < 5m
10.0
+10
LS, RS
RS
+5
5.0
+5°
R
+3°
110°
0
0.0
-2.5°
-5.0
-5
-6°
30
C
L, R
r=1m∼5m
-250mm
-15
-15.0
LS
135°
C
thinks about the multi-channel studios.
+15
15.0
‹
＝
RS
ITU (100°∼120°)
C
RS
-10
-10.0
＋
LS
L
LS
Off-axis errors
9 / 21
Off-axis
O ff-ax isangle
an g le [degs]
[° ]
6 / 21
RS
RS
LS RS
150°
1 1,500
1.5 2,000
2 2,500
2.5 3,000
3 3.5
4 4.5
5
1,000
3,500 4,000
4,500 5,000
r [mm]
r [mm]
Tripole ® by M&K.
L
+250 -250
LS
JPPA 2002 THXpm3 Seminar
by Masataka Nakahara
1st June 2002
pp. A - 4
© 2002 SONA CORPORATION.
Why bass management is needed?
thinks about the multi-channel studios.
Which needs a WIDE
dispersion speaker
10.0
+10
20
LS, RS
‹ Small room / Large room
Small room
‹ Front / Surround
Surrounds
‹ Forward / Backward
・L,R
Forward
・LS,RS
Backward
+5
5.0
+5°
+3°
0.0
0
L, R
-10
-10.0
-250mm
-15
-15.0
r [mm]
r [mm]
+10dB
L=C=R=LS=RS
0
-10
-20
20 –120Hz
20 - 80Hz
-30
-40
LS, RS in a Small room
needs
Wide dispersion speaker
1 1,500
1.5 2,000
2 2.5
3 3.5
4 4.5
5
1,000
2,500 3,000
3,500 4,000
4,500 5,000
?
?
LFE
10
5k
8k
12.5k
20k
+250mm
20
31.5
50
80
125
200
315
500
800
1.25k
+15
15.0
-2.5°
-5.0
-5
-6°
13 / 21
2k
3.15k
thinks about the multi-channel studios.
12.5
10 / 21
Off-axis
O ff-ax isangle
ang le [°]
[° ]
© 2002 SONA CORPORATION.
Off-axis errors
Relative SPL [dB]
© 2002 SONA CORPORATION.
1/3 octave band center frequency [Hz]
Tripole ® by M&K.
© 2002 SONA CORPORATION.
© 2002 SONA CORPORATION.
SPL errors
11 / 21
thinks about the multi-channel studios.
relative SPL [dB]
θL,R = 30°
Δd = 250mm
0
-5
-10
-15
-20
-25-0.8dB∼1.0dB
-30
-35
R
Low frequency characteristics in a small / medium room
θLS,RS = 110°
r = 1.5m, 4m
30
C
Standing waves, room modes, degeneracy
‹
Room acoustic
„ Absorption
– Almost 100% absorption
„ 90% … -10dB, 99.9999% … -60dB
„ fc = 100Hz, Thickness ≒ 80cm
‹ Loudspeakers’ placement
„ Available for a SUB only.
‹ Electric acoustic
„ Bass Management Controller
– Bass redirection to SUB
r=1.5m, 4m
-0.4dB∼0.4dB
L
+250 -250
LS
Distance from a source [m]
Source
Room
: Q=2,
:αave = 0.6
3.5m (W) ×4.0m (D)×2.2m (H)，r = 1.5m
10.0m (W)×15.0m (D)×6.0m (H)，r = 4.0m
© 2002 SONA CORPORATION.
12 / 21
thinks about the multi-channel studios.
110°
Large room : r=4.0m
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Small room
Large room
14 / 21
RS
Small room : r=1.5m
Ways of a Bass Management
© 2002 SONA CORPORATION.
thinks about the multi-channel studios.
Bass management Controller
15 / 21
thinks about the multi-channel studios.
Products
Bass management Controller
- Bass management -
M&K : LFE-5
Bass management Controller
Bass Management
L
C
R
LS
RS
LFE
+
+10dB
L
C
R
LS
RS
SW
Front face
THX CC4
Back panel
AC
JPPA 2002 THXpm3 Seminar
by Masataka Nakahara
1st June 2002
pp. A - 5
© 2002 SONA CORPORATION.
© 2002 SONA CORPORATION.
Advantages of Bass management controller
16 / 21
© 2002 SONA CORPORATION.
19 / 21
thinks about the multi-channel studios.
thinks about the multi-channel studios.
LFE
L, R ave.
LS, RS ave.
C
BGN
Advantages in Low frequency
Bass management Controller
Bass Management
L
C
R
LS
RS
LFE
L
C
R
LS
RS
SW
+
+10dB
‹ You can take same characteristics of each
channel.
‹ You can take best characteristics on site
for every channel.
-Search the best position only for a SUB.
‹ You can tune the LFE gain (+10dB)
easily and absolutely.
‹ You can take full-range (20-20kHz)
characteristics.
‹ You can confirm “bass redirection” effect
for DVD-V (Dolby DIGITAL).
© 2002 SONA CORPORATION.
+10dB
at
each band
Details of Bass management controllers
20 / 21
thinks about the multi-channel studios.
thinks about the multi-channel studios.
Interference
P
L
Bass Management 1
Without
Bass Management
Bass Management
Consumer Receiver
Acoustical summation
Electrical summation
Less interference
Live (Diffuse) < Dead
<
Much more interference
t
HPF
L
L
HPF
L
R
HPF
R
R
HPF
R
C
HPF
C
C
HPF
C
LS
HPF
LS
LS
HPF
LS
HPF
RS
HPF
RS
LPF
SUB
RS
P
R
P
+10dB
SPL
[dB]
LFE
>
Loudspeaker response 1
Sample of a measurement data
Without Bass Management
100
90
80
70
60
50
40
30
20
BGN
0
1/3 octave band center frequency [Hz]
LPF’
SUB
HPF : 12dB/oct , 24dBoct
POOR
thinks about the multi-channel studios.
10
+10dB?
5ch
+10dB
RICH
Live (Diffuse) > Dead
18 / 21
+10dB
LPF
t
L+ R
SW
If the sound using bass management don’t have any problems,
it doesn’t have any problems on any room conditions.
© 2002 SONA CORPORATION.
RS
LFE
P
t
L+R
t
Auditory impression
Bass Management 2
L
LFE
60Hz delay = 87msec
With Bass Management
100
90
80
70
60
50
40
30
20
10
0
1/3 octave band ce nte r fre que ncy [Hz ]
Differences of the Low frequency behavior
Summation
Sample of a measurement data
© 2002 SONA CORPORATION.
Interference of low frequency sound
17 / 21
Loudspeaker response 2
Main speaker
80Hz, 24dB/oct
© 2002 SONA CORPORATION.
21 / 21
Main speaker
80Hz
Accurate tuning!
f [Hz]
f [Hz]
References
thinks about the multi-channel studios.
隔月間プロサウンド ステレオサウンド社
„
2000.12 vol.100 Sony PCL 408 THX Suiteのアコースティックデザイン（前編）
„
2001.2 vol.101 Sony PCL 408 THX Suiteのアコースティックデザイン（後編）
„
2001.6 vol.103 ∼
マルチチャンネルスタジオのアコースティックデザイン（連載）
– 2001.6 vol.103 各種マルチチャンネル・フォーマットの概要
– 2001.8 vol.103 再生特性
– 2001.10vol.103 ベース・マネージメント
– 2001.12vol.103 スピーカ配置
– 2001.2 vol.103 再生環境の誤差
– 2001.4 vol.103 モニター・システム
‹ サラウンド制作ハンドブック 沢口真生編 兼六館出版
„
第3章 サラウンドコントロールルーム設計
– 中小規模のポスプロ・スタジオ設計
‹ サウンドレコーディング技術概論 社団法人日本スタジオ協会 兼六館出版
„
第6章 次世代音響技術
– 6.2 マルチチャンネル再生
‹