jppa 2002 thx pm3 seminar - lecture 1 · 2012. 6. 21. · (dolby, dts) , dvd-a, sacd, dtv etc. pm3...
TRANSCRIPT
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JPPA 2002 THXpm3 Seminarby Masataka Nakahara
© 2002 SONA CORPORATION.
pp. A - 11st June 2002
thinks about the multi-channel studios.
JPPA2002_THXpm3
SONA CORPORATION2-19-9 Yayoi-cho Nakano-ku Tokyo 164-0013 Japan
P/ +81 3 5350 2621, F/ +81 3 5350 2670E/ [email protected], [email protected], [email protected]
Greeting from SONA
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
SONA is working for …
Acoustic design / Acoustical survey and measurement / Acoustical consultationArchitectural design and construction / Specially ordered furniture designTechnical support for audio makers / Study and research with acoustic lab
THX pm3 (Professional Multichannel Mixing and Monitoring) is a Studio designing program for a professional multichannel studio.
Dealer company of M&K professional loudspeakers
Representation company of Lucasfilm THX®pm3TM program- SONA is an only international rep. of THXpm3. -
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© 2002 SONA CORPORATION.
Digest of SONA’s Works2 / 2
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JPPA2002_THXpm3
THXpm3 project and SONA
THX and Lucasfilm are ©Lucasfilm Ltd. & TM. All rights are reserved. Used under authorization.
Copyright 2002 SONA CORPORATION
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
Advantages of THXpm3 studios
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 DVD-A).pm3 studio can use “THX®pm3™ Logo”.e.g., Catalogue of the studio
Credit of an end-roll DVD-V etc.Package Music etc.
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pm3 = Professional Multi-channel Mixing and MonitoringAcoustic design and maintenance program for small / medium multichannel studios
THX and Lucasfilm are ©Lucasfilm Ltd. & TM. All rights are reserved. Used under authorization.
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
THXpm3 Logos etc.
THXpm3 plaques
Mixed & Recorded in a
THX® pm3TM Certified Facility
THXpm3 Logos
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pm3 = Professional Multi-channel Mixing and MonitoringAcoustic design and maintenance program for small / medium multichannel studios
THX and Lucasfilm are ©Lucasfilm Ltd. & TM. All rights are reserved. Used under authorization.
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JPPA 2002 THXpm3 Seminarby Masataka Nakahara
© 2002 SONA CORPORATION.
pp. A - 21st June 2002
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
THXpm3 project among Client, THX and SONA
pm3 = Professional Multi-channel Mixing and Monitoring
ClientStudio owner
SONA
¥Support fee¥Pre-measurement
Pre-tuning fee
$Design, measurement fee
Manager
Accounting
Designer
Fieldtechnician
THX
$THX CC4 fee
Trading directly
Agreement papers
Support of all progresses
Cooperation
Pre-tuning, Pre-measurementSupport of measurement works
on site
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Acoustic design and maintenance program for small / medium multichannel studios
THX and Lucasfilm are ©Lucasfilm Ltd. & TM. All rights are reserved. Used under authorization.
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
SONA supports THXpm3 project
pm3 = Professional Multi-channel Mixing and Monitoring
Project flow of THXpm3
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Acoustic design and maintenance program for small / medium multichannel studios
THX and Lucasfilm are ©Lucasfilm Ltd. & TM. All rights are reserved. Used under authorization.
Note ! THXpm3 room is certificated only by the THX people (not by SONA).
SONA can supports each or all processGeneral affairs
– Agreement papers, import of CC4, support of a certification measurementPlanning
– Acoustic design / consulting, system planningDrawing
– Planning drawings, Working drawingsConstructingMeasurement / tuning
– Room acoustic, loudspeaker response
ProposalRoom acoustic
Monitoring system
planning DrawingPlanning drawingWorking drawing
Constructing CertificateMeasurement
Tuning
Annualtesting
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Copyright 2002 SONA CORPORATION
Jun 1st 2002
Some keys of Multichannel monitoring environment
Masataka NakaharaSONA Corporation
JPPA2002_THXpm3
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© 2002 SONA CORPORATION.
Overview
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© 2002 SONA CORPORATION.
Keys of Multichannel monitoring2 / 21
Multichannelformats
Bassmanagement
Timealignment
Loudspeakers’placement
Surround processingA/D, D/A, Compression
Record spec.Playback spec.
L/C/R, SUBDirect surroundDiffuse surround
Room acousticsLoudspeakers’ placement
Bass management controller
Comb filteringHaas effect
X-over of sub
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© 2002 SONA CORPORATION.
Monitor flow3 / 21
L R C S3-1
Main BUS
L R C LFELS RS5.1
Mon
itor
BU
SR
ec. B
US
To Recorder
SW
LSRS
LRC
Master Vol.VU
Multichannelformats
Loudspeakers’placement
Bassmanagement
Timealignment
L R2
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JPPA 2002 THXpm3 Seminarby Masataka Nakahara
© 2002 SONA CORPORATION.
pp. A - 31st June 2002
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© 2002 SONA CORPORATION.
Today’s special4 / 21
Multichannelformats
Bassmanagement
Timealignment
Loudspeakers’placement
Surround processingA/D, D/A, Compression
Record spec.Playback spec.
L/C/R, SUBDirect surroundDiffuse surround
Room acousticsLoudspeakers’ placement
Bass management controller
Comb filteringHaas effect
X-over of sub
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
Direct / Diffuse surround environment- Loudspeakers’ placement -
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© 2002 SONA CORPORATION.
L C R
SW
L C R
SW
Direct surround and Diffuse surround
Advantagesprecise phantom images (statical)
DrawbacksCompatibilities between different monitoring environments“Hot-spot” listening area
LS RS
+ =
Direct Surround environment Diffuse Surround environment
RSLS
CL R
LS RS
ITU (100°~120°) 135° 150°
LS RS
CL R
LS RS
CL R
Music, Rec. ITU-R BS. 775-1 Movie, Postproduction
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Advantagesambient, fly-over
(dynamic)Robust, generality
DrawbacksAmbiguous phantom images
Tripole ® by M&K.
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© 2002 SONA CORPORATION.
GeneralityUltimate
Interchangeability
Direct Surround Diffuse Surround
CL R
LS RSLS RS
CL R
LS RS
CL R
Studios
End-users
LS RS
CL R
LS RS
CL R CL R
LS RS
×
○
△
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Interchangeabilities
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© 2002 SONA CORPORATION.
Monitoring impressions
LC
R
LS RS
Small room
85dBC84dBC
Out of area
Large room
LC
R
LS RS
“Hot-spot” listening
Large SPL differences “Headphone” images of LS and RS
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thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
-15.0
-10.0
-5.0
0.0
5.0
10.0
15.0
1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000
r [mm]
Off-
axis
ang
le [°
]
Off-axis errors
-250mm
+250mm
L, R
LS, RS
1m < r < 5m
r=1m~5m
Δd = 250mm
+250 -250
θL,R = 30°
30
θLS,RS = 110°
110°
Off
-axi
s ang
le [d
egs]
0
+5
+10
+15
-5
-10
-15
+5°+3°
-6°-2.5°
1 1.5 2 2.5 3 3.5 4 4.5 5r [mm]
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L
C
R
LS
RS
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JPPA 2002 THXpm3 Seminarby Masataka Nakahara
© 2002 SONA CORPORATION.
pp. A - 41st June 2002
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
-15.0
-10.0
-5.0
0.0
5.0
10.0
15.0
1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000
r [mm]
Off-
axis
ang
le [°
]
Off-axis errors
-250mm
+250mm
L, R
LS, RS
Off
-axi
s ang
le [°
]
0
+5
+10
+15
-5
-10
-15
+5°+3°
-6°-2.5°
1 1.5 2 2.5 3 3.5 4 4.5 5r [mm]
Small room / Large roomSmall roomFront / SurroundSurroundsForward / Backward・L,R Forward・LS,RS Backward
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Which needs a WIDE dispersion speaker
LS, RS in a Small roomneeds
Wide dispersion speaker
Tripole ® by M&K.
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
SPL errors11 / 21
0
Small room : r=1.5m
Large room : r=4.0m
-35-30-25-20-15-10-5
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.5 5.0Distance from a source [m]
rela
tive
SPL
[dB
]
4.0
-0.8dB~1.0dB
-0.4dB~0.4dB
Small room 3.5m (W) ×4.0m (D)×2.2m (H),r = 1.5mLarge room 10.0m (W)×15.0m (D)×6.0m (H),r = 4.0m
Source : Q=2, Room :αave = 0.6
+250 -250
30
110°
L
C
R
LS
RSr = 1.5m, 4m
r=1.5m, 4m
Δd = 250mmθL,R = 30° θLS,RS = 110°
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© 2002 SONA CORPORATION.
Bass management Controller- Bass management -
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© 2002 SONA CORPORATION.
Why bass management is needed?13 / 21
31.5 50 80 125
200
315
500
800
1.25
k 2k3.
15k 5k 8k
12.5
k20
k
1/3 octave band center frequency [Hz]
20
20
-40
-30
-20
-10
0
10
12.5
Rel
ativ
e SP
L [d
B]
L=C=R=LS=RS
20 –120Hz 20 - 80Hz
+10dB
LFE ? ?
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© 2002 SONA CORPORATION.
Ways of a Bass Management14 / 21
Room acousticAbsorption
– Almost 100% absorption90% … -10dB, 99.9999% … -60dBfc = 100Hz, Thickness ≒ 80cm
Loudspeakers’ placementAvailable for a SUB only.
Electric acousticBass Management Controller
– Bass redirection to SUB
Low frequency characteristics in a small / medium room
Standing waves, room modes, degeneracy
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
Bass management Controller
Bass Management
LCR
LSRS
LFE
LCR
LSRSSW+
+10dB+
Bass management Controller
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Products
THX CC4Front face
Back panelAC
M&K : LFE-5
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JPPA 2002 THXpm3 Seminarby Masataka Nakahara
© 2002 SONA CORPORATION.
pp. A - 51st June 2002
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
Advantages of Bass management controller
Bass Management
LCR
LSRS
LFE
LCR
LSRSSW+
+10dB+
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Advantages in Low frequency
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).
Bass management Controller
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
If the sound using bass management don’t have any problems, it doesn’t have any problems on any room conditions.
>
<
Interference of low frequency sound
Bass ManagementConsumer Receiver
Differences of the Low frequency behavior
Acoustical summation Electrical summation
WithoutBass Management
Summation
Less interference Much more interferenceInterference Live (Diffuse) < Dead
RICH POORLive (Diffuse) > Dead
Auditory impression
tP
L
tP
R
t
P
L60Hz delay = 87msec t
P
L+R + R
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thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
Loudspeaker response 1
0
10
20
30
40
50
60
70
80
90
100
1/3 octave band center frequency [Hz]
BGN
Sample of a measurement data
Without Bass Management
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© 2002 SONA CORPORATION.
Loudspeaker response 2
Sample of a measurement data
With Bass Management
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0102030405060708090
100
1/3 octave band ce nte r fre que ncy [Hz ]
LFEL, R ave.LS, RS ave.CBGN
+10dBat
each band
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
Details of Bass management controllers20 / 21
LFE
LS
RS
L
R
C
+10dB
HPF
LPF
HPF
HPF
HPF
HPF
SUB
LS
RS
L
R
C
Bass Management 1 Bass Management 2
f [Hz]
SPL[dB]
80Hz, 24dB/oct
SW Main speaker
5chLFE
+10dB
+10dB?
f [Hz]
Main speaker
80Hz
HPF : 12dB/oct
LS
RS
L
R
C
HPF
HPF
HPF
HPF
HPF
SUB
LS
RS
L
R
C
LPF
LFE +10dB LPF’
, 24dBoct
Accurate tuning!
thinks about the multi-channel studios.
© 2002 SONA CORPORATION.
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
References21 / 21