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(often shortened to ‘dolby labs’)
(known simply as ‘dolby’)
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*’dolby laboratories (incorporated) is an ‘american company’ specializing in…*
‘audio noise reduction*
*audio encoding/compression*
*spatial audio*
*HDR imaging*
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*RAY DOLBY*
(american audio engineer)
(1933 – 2013)
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Dolby licenses its technologies to consumer electronics manufacturers
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History
Dolby Labs was founded by Ray Dolby (1933–2013) in London, United Kingdom, in 1965.
In the same year, he invented the Dolby Noise Reduction system, a form of audio signal processing for reducing the background hissing sound on audio tape recordings
His first U.S. patent on the technology was filed in 1969, four years later
The method was first used by Decca Records in the UK
He moved the company headquarters to the United States (San Francisco, California) in 1976
The first product Dolby Labs produced was the Dolby 301 unit which incorporated Type A Dolby Noise Reduction, a compander-based noise reduction system. These units were intended for use in professional recording studios.
Dolby was persuaded by Henry Kloss of KLH to manufacture a consumer version of his noise reduction. Dolby worked more on companding systems and introduced Type B in 1968.
Dolby also sought to improve film sound. As the corporation’s history explains:[citation needed]
Upon investigation, Dolby found that many of the limitations in optical sound stemmed directly from its significantly high background noise. To filter this noise, the high-frequency response of theatre playback systems was deliberately curtailed…
To make matters worse, to increase dialogue intelligibility over such systems, sound mixers were recording soundtracks with so much high-frequency pre-emphasis that high distortion resulted
.
The first film with Dolby sound was A Clockwork Orange (1971), which used Dolby noise reduction on all pre-mixes and masters, but a conventional optical sound track on release prints.
Callan (1974) was the first film with a Dolby-encoded optical soundtrack
In 1975, Dolby released Dolby Stereo, which included a noise reduction system in addition to more audio channels (Dolby Stereo could actually contain additional center and surround channels matrixed from the left and right). The first film with a Dolby-encoded stereo optical soundtrack was Lisztomania (1975), although this only used an LCR (Left-Center-Right) encoding technique. The first true LCRS (Left-Center-Right-Surround) soundtrack was encoded on the movie A Star Is Born in 1976. In less than ten years, 6,000 cinemas worldwide were equipped to use Dolby Stereo sound. Dolby reworked the system slightly for home use and introduced Dolby Surround, which only extracted a surround channel, and the more impressive Dolby Pro Logic, which was the domestic equivalent of the theatrical Dolby Stereo.[8]
Dolby developed a digital surround sound compression scheme for the cinema.
Dolby Stereo Digital (now simply called Dolby Digital) was first featured on the 1992 film Batman Returns. Introduced to the home theater market as Dolby AC-3 with the 1995 laserdisc release of Clear and Present Danger, the format did not become widespread in the consumer market, partly because of extra hardware that was necessary to make use of it, until it was adopted as part of the DVD specification. Dolby Digital is now found in the HDTV (ATSC) standard of the United States, DVD players, and many satellite-TV and cable-TV receivers.
Dolby developed a digital surround sound compression scheme for the TV series The Simpsons.[citation needed]
On February 17, 2005, the company became public, offering its shares on the New York Stock Exchange, under the symbol DLB. On March 15, 2005, Dolby celebrated its fortieth anniversary at the ShoWest 2005 Festival in San Francisco.[citation needed]
On January 8, 2007, Dolby announced the arrival of Dolby Volume at the International Consumer Electronics Show.[citation needed]
On June 18, 2010, Dolby introduced Dolby Surround 7.1, and set up theaters worldwide with 7.1 surround speaker setups to deliver theatrical 7.1 surround sound.
The first film to be released with this format was Pixar’s Toy Story 3 which was later followed by 50 releases using the format. About eighty percent of films released are mixed in Dolby Surround 7.1 by default.
In April 2012, Dolby introduced its Dolby Atmos, a new cinematic technology adding overhead sound, first applied in Pixar’s motion picture Brave.[9] In July 2014, Dolby Laboratories announced plans to bring Atmos to home theater. The first television show to use the technology on disc was Game of Thrones.
On February 24, 2014, Dolby acquired Doremi Labs for $92.5 million in cash plus an additional $20 million in contingent consideration that may be earned over a four-year period.[10]
In May 2019, Dolby decided to add Dolby Atmos to hundreds of newer songs in the music industry.[citation needed]
Technologies[edit]
Analog audio noise reduction[edit]
Dolby A: professional noise reduction systems for tapes and analog cassettes.
Dolby NR/B/C/S: consumer noise reduction systems for tapes and analog cassettes.
Dolby SR (Spectral Recording): professional four-channel noise reduction system in use since 1986, which improves the dynamic range of analog recordings and transmissions by as much as 25 dB. Dolby SR is utilized by recording and post-production engineers, broadcasters, and other audio professionals. It is also the benchmark in analog film sound, being included today on nearly all 35 mm film prints. On films with digital soundtracks, the SR track is used in cinemas not equipped for digital playback, and it serves as a backup in case of problems with the digital track.
Dolby FM: noise reduction system for FM broadcast radio. Dolby FM was tried by a few radio stations starting with WFMT in 1971. It used Dolby B, combined with 25 microsecond pre-emphasis. A small number of models of tuners and receivers were offered with the necessary decoder built in. In addition, a few cassette deck models appeared that allowed the deck’s internal Dolby B decoder to be put in the line in to line out “pass-through” path, permitting its use with Dolby FM broadcasts. The system was not successful and was on the decline by 1974.
Dolby HX Pro: single-ended system used on high-end tape recorders to increase headroom. The recording bias is lowered as the high frequency component of the signal being recorded increases, and vice versa. It does nothing to the actual audio that is being recorded, and it does not require a special decoder. Any HX Pro recorded tape will have, in theory, better sound on any deck.
Dolby Advanced Audio: Dolby surround sound, locking preferred volume level, optimizes audio performance for specific PC models and lets turning up the volume to the built-in speakers without distorting the sound.[11]
Audio encoding/compression[edit]
Dolby Surround
Dolby Digital (also known as AC-3) is a lossy audio compression format. It supports channel configurations from mono up to six discrete channels (referred to as “5.1”). This format first allowed and popularized surround sound. It was first developed for movie theater sound and spread to Laserdisc and DVD. It has been adopted in many broadcast formats including all North American digital television (ATSC), DVB-T, direct broadcast satellite, cable television, DTMB, IPTV, and surround sound radio services. It is also part of both the Blu-ray and the now defunct HD DVD standards. Dolby Digital is used to enable surround sound output by most video game consoles. Several personal computers support converting all audio to Dolby Digital for output.
Dolby Digital EX: introduces a matrix-encoded center rear surround channel to Dolby Digital for 6.1 channel output.[12] This center rear channel is often split to two rear back speakers for 7.1 channel output.
Dolby Digital Plus (also known as E-AC-3) is a lossy audio codec based on Dolby Digital that is backward compatible, but more advanced. The DVD Forum has selected Dolby Digital Plus as a standard audio format for HD DVD video. It supports datarates up to 6 Mbit/s, an increase from Dolby Digital’s 640 kbit/s maximum. On Blu-ray, Dolby Digital Plus is implemented differently, as a legacy 640 kbit/s Dolby Digital stream plus an additional stream to expand the surround sound, with a total bandwidth of approximately 1.7 Mbit/s. Dolby Digital Plus is also optimized for limited datarate environments such as Digital broadcasting.
Dolby Digital Live is a real-time hardware encoding technology for interactive media such as video games. It converts any audio signals on a PC or game console into the 5.1-channel Dolby Digital format and transports it via a single S/PDIF cable.[13] A similar technology known as DTS Connect is available from competitor DTS.
Dolby E selected hardware.
Dolby E: professional coding system optimized for the distribution of surround and multichannel audio through digital two-channel post-production and broadcasting infrastructures, or for recording surround audio on two audio tracks of conventional digital video tapes, video servers, communication links, switchers, and routers. The Dolby E signal does not reach viewers at home. It is transcoded to Dolby Digital at a lower datarate for final DTV transmission.
Dolby Stereo (also known as Stereo A): original analog optical technology developed for 35 mm prints and is encoded with four sound channels: Left/Center/Right (which are located behind the screen) and Surround (which is heard over speakers on the sides and rear of the theatre) for ambient sound and special effects. This technology also employs A-type or SR-type noise reduction, listed above with regards to analog cassette tapes. See also Dolby Surround
Dolby TrueHD: Offers bit-for-bit sound reproduction identical to the studio master. Over seven full-range 24-bit/96 kHz discrete channels are supported (plus an LFE channel, making it 7.1 surround) along with the HDMI interface. Theoretically, Dolby TrueHD can support more channels, but this number has been limited to 8 for HD DVD and Blu-ray Disc.
Dolby Pulse: released in 2009, it is identical to the HE-AAC v2 codec except for the addition of Dolby metadata, which is common for Dolby’s other digital audio codecs. This metadata “ensures consistency of broadcast quality.”[14]
Dolby AC-4 is a lossy audio compression format which can contain audio channels and/or audio objects.
Dolby Atmos is a suite of technologies for immersive audio having both horizontal and vertical sound placement, using a combination of channel and object-based mixing and delivery. It was first introduced in cinemas with Brave (2012 film). The first game released with Dolby Atmos audio was Star Wars Battlefront (2015 video game). The means of delivering the channels and objects differ given the technical limitations across different media, and the target platform. Dolby Atmos is not a codec; on the consumer market, pre-recorded Dolby Atmos is delivered as an extension to a Dolby TrueHD, Dolby Digital Plus, or Dolby AC-4 stream.
Audio processing[edit]
Dolby system A-type decoder
Dolby Headphone: an implementation of virtual surround, simulating 5.1 surround sound in a standard pair of stereo headphones.[15]
Dolby Virtual Speaker: simulates 5.1 surround sound in a setup of two standard stereo speakers.[15]
Dolby Surround, Dolby Pro Logic, Dolby Pro Logic II, Dolby Pro Logic IIx, and Dolby Pro Logic IIz: these decoders expand sound to a greater number of channels. All can decode surround sound that has been matrixed into two channels; some can expand surround sound to a greater number of speakers than the original source material. See the referenced articles for more details on each decoder.
Audistry: sound enhancement technologies.[16]
Dolby Volume: reduces volume level changes.[17]
Dolby Mobile: A version of Dolby’s surround sound technology specifically designed for mobile phones, notably the HTC Desire HD, LG Arena and LG Renoir.
Dolby Audio Plug-in for Android: An API packaged as a Java Library that allows Android Developers to take advantage of Dolby Digital Plus Technology embedded into mobile and tablet devices, notably the Fire HD, Fire HDX, and Samsung Galaxy Tab 3 series.
Dolby Voice: Hardware and software products for enterprise-level web conferencing.[18]
Video processing[edit]
Dolby Contrast provides enhanced image contrast to LCD screens with LED backlight units by means of local dimming.[19]
Perceptual Quantizer (PQ),[20] published by SMPTE as SMPTE ST 2084, is a transfer function that allows for the display of high dynamic range (HDR) video with a luminance level of up to 10,000 cd/m2 and can be used with the Rec. 2020 color space.[21][22][23][24] On August 27, 2015, the Consumer Electronics Association announced the HDR10 Media Profile which uses the Rec. 2020 color space, SMPTE ST 2084, and a bit depth of 10-bits.[25] On August 2, 2016, Microsoft released the Windows 10 Anniversary Update, which supports the HDR10 format with PQ (ST 2084) transfer function and Rec.2020 color space.[26]
Dolby Vision is a content mastering and delivery format similar to the HDR10 media profile. It supports both high dynamic range (HDR) and wide color gamut (ITU-R Rec. 2020 and 2100) at all stages from content creation and production to transmission and playback. Dolby Vision includes the Perceptual Quantizier (SMPTE ST-2084) electro-optical transfer function and supports displays with up to 10,000-nit maximum brightness (4,000-nit in practice).
It also provides up to 8K resolution and color depth of up to 12-bits (backward compatible with current 8-bit and 10-bit displays).
Dolby Vision can encode mastering display colorimetry information using static metadata (SMPTE ST 2086) and dynamic metadata (SMPTE ST 2094-10, Dolby format) for each scene or frame of a video.[28] Examples of Ultra HD (UHD) Dolby Vision are available in TV, monitor, mobile devices and theater. Dolby Vision content can be delivered on Ultra HD Blu-ray discs,[29][30] over conventional broadcasting, OTT, and online streaming media services.[31] Dolby Vision metadata can be carried via HDMI interface versions 1.4b and above.[32] It also supports IPTPQc2 color space, that is similar to ICtCp. Dolby Vision IQ is an update designed to optimise Dolby Vision content according to the brightness of the room.[33]
ICtCp provides an improved color representation that is designed for high dynamic range (HDR) and wide color gamut (WCG).[34] An improved constant luminance is an advantage for color processing operations such as chroma subsampling and gamut mapping where only color information is changed.[34] ICtCp is based on a modification of IPT called ICaCb.[35]
Digital cinema[edit]
Dolby Digital Cinema[36]
Dolby Surround 7.1,[37] first introduced theatrically with Toy Story 3, in 2010.
Dolby 3D[38]
Dolby Atmos[39]
Dolby Cinema, a premium cinema concept developed by Dolby Laboratories as a direct competitor to IMAX.[40]
Live sound[edit]
Dolby Lake Processor[41] – as of 2009, all Lake products are owned by Lab Gruppen.[42]
Dolby Surround systems at a glance[edit]
Over the years Dolby has introduced several surround sound systems. Their differences are explained below.
Decoder Encoder Year Description Channels
Dolby Stereo Dolby MP Matrix 1975 Cinema use with optical technology. Uses Dolby A for noise reduction. 4:2 encoded for 35mm film and 2:4 decoded back to 4.0 by Dolby Stereo Processor. Discrete Magnetic 6-Track variant for 70mm. FL FR with C and MonoSurround matrixed
Dolby Surround ” 1982 Consumer Variant of Dolby Stereo. Original Decoder utilized a simple passive L-R Circuit with Delay and Phantom Center for 3-Channel Decoding. FL FR and MonoSurround matrixed
Dolby Stereo SR Dolby MP Matrix 1986 Addition of Dolby SR Noise Reduction to Dolby Stereo for Enhanced Fidelity and Dynamic Range. FL FR with C and MonoSurround matrixed
Dolby Pro Logic ” 1986 Modern
1987 Reference Active Matrix 2:4 Decoder (Cat No. 150) for Dolby Stereo and Dolby Surround. Accurately Decodes Lt/Rt to Recover the LCRS 4.0 Surround. FL FR with C and MonoSurround matrixed
Dolby Digital AC-3 1986 Modern
1992 Film
1995 Laser Disc Discrete channel encoder/decoder. Pro Logic Decoder can be used for downmixed stereo inputs. FL FR C SL SR SUB
Dolby Digital Surround EX AC-3 1999 6.1 or 7.1 Surround via Matrix Encoding of Ls/Rs Channels in 5.1. Remains backwards compatible with standard 5.1 digital. FL FR C SL SR (with matrixed RearMono) SUB [non-discrete 7.1: BackLeft and BackRight]
Dolby Pro Logic II N/A 2000 Upmixes non-Encoded Stereo to Surround 5.1. Can also be used to decode Dolby Surround for 5.1 Playback. Consumer Decoders often include specific Movie, Music, or Game modes. FL FR C SL SR SUB
Dolby Pro Logic IIx N/A 2002 Extension to PLII. Enhancement of either Stereo, Dolby Surround, Dolby Digital 5.1 to 6.1 or 7.1. Decodes Dolby Digital EX to 6.1 or 7.1. Retains Movie, Music, or Game modes in Consumer Products. FL FR C SL SR SUB Left Back and Right Back
Dolby Digital Plus Enhanced AC-3 2005 Lossy compression codec; 48 kHz sampling frequency, 20-bit word length; supports data rates of 32 kbit/s – 6 Mbit/s, scalable, including 768 kbit/s – 1.5 Mbit/s on high-definition optical discs, typically, and 256 kbit/s for broadcast and online. 1.0- to 7.1-channel support for current media applications; extensible to 16 channels; discrete. Backward compatible with Dolby Digital through S/PDIF connection up to 640 kbit/s. Supports Dolby Metadata. FL FR C SL SR SUB Left Back and Right Back
Dolby TrueHD MLP 2005 Lossless compression codec; supports 44.1 kHz to 192 kHz sampling frequency up to 24-bit word length; supports variable data rate up to 18 Mbit/s; maximum channel support is 16 channels as presently deployed. Higher bitrate than Dolby Digital Plus. Blu-ray Disc channel support up to eight channels of 96 kHz/24-bit audio; six channels (5.1) up to 192 kHz/24-bit; and two- to six-channel support up to 192 kHz/24-bit maximum bit rate up to the maximum of 18 Mbit/s.
Dolby Pro Logic IIz N/A 2009 Extension to PLIIx. Decodes Stereo, Dolby Surround or Discrete 5.1/6.1/7.1 to 7.1 Height or Full 9.1 with the addition of Front Height Channels. Last Pro Logic Branded Decoder from Dolby. L, C, R, Ls, Rs, Lrs (Left Back), Rrs (Right Back), LFE, Lvh and Rvh
See also[edit]
CX (analog noise reduction competitor)
dbx (analog noise reduction competitor)
High Com (analog noise reduction competitor)
DTS (digital soundspace competitor)
Meridian Lossless Packing (lossless coding for DVD-Audio)
SRS Labs (surround sound competitor)
Beats Audio (digital soundspace competitor)
Sony Dynamic Digital Sound (digital soundspace competitor)
Dolby Theatre
THX
References[edit]
^ Jump up to: a b c d e “DLB Company Financials”. NASDAQ.
^ “metrics at a glance – Dolby Laboratories, Inc” (PDF). Dolby Laboratories. Archived from the original on September 16, 2021. Retrieved September 9, 2021.
^ “Dolby Laboratories – Sound Technology, Imaging Technology, Voice Technology”. Audistry.com. Retrieved April 26, 2012.
^ “ViaLicensing”. ViaLicensing. Retrieved April 26, 2012.
^ Williamson, Marcus (September 13, 2013). “Ray Dolby obituary: Inventor whose noise-reduction technology transformed sound reproduction”. The Independent.
^ “50 Years of Innovation – Dolby History”. Dolby Laboratories. Retrieved September 14, 2017.
^ Sergi, Gianluca (2004). The Dolby Era: Film Sound in Contemporary Hollywood. Manchester University Press. p. 46. ISBN 0719070678.
^ “Star Wars and the Explosion of Dolby Stereo – Tested.com”. Tested.
^ “Pixar’s Brave to debut new Dolby Atmos sound system”. BBC News. BBC. April 25, 2012. Retrieved April 26, 2012.
^ “Dolby Signs Agreement to Acquire Doremi Labs”. Dolby.com. February 24, 2014. Archived from the original on March 15, 2014. Retrieved February 24, 2014.
^ “Dolby Advanced Audio v2”. www.dolby.com.
^ “Dolby Digital EX”. Dolby.com. Retrieved April 26, 2012.
^ “Dolby Digital Live”. Dolby.com. Retrieved April 26, 2012.
^ “Dolby Pulse – combining the merits of Dolby Digital and HE-AAC” (PDF). Archived from the original (PDF) on June 1, 2010. Retrieved December 10, 2008.
^ Jump up to: a b “Dolby Headphone with 5.1 Surround Sound Stereo”. Dolby.com. Retrieved April 26, 2012.
^ “Dolby Laboratories – Sound Technology, Imaging Technology, Voice Technology” (PDF). Audistry.com. Retrieved April 26, 2012.
^ “Dolby Volume”. Dolby.com. Retrieved April 26, 2012.
^ “Dolby Voice Overview”. Dolby.com. Retrieved December 12, 2019.
^ “Dolby Debuts New Video Technologies at International CES 2008”. Dolby press release. Archived from the original on April 17, 2008. Retrieved March 28, 2008.
^ An Introduction to Dolby Vision (PDF). Dolby Vision. Dolby Laboratories. 2016.
^ Adam Wilt (February 20, 2014). “HPA Tech Retreat 2014 – Day 4”. DV Info Net. Retrieved November 5, 2014.
^ “ST 2084:2014”. Society of Motion Picture and Television Engineers. Retrieved September 21, 2015.
^ Chris Tribbey (July 10, 2015). “HDR Special Report: SMPTE Standards Director: No HDR Format War, Yet”. MESA. Archived from the original on September 13, 2015. Retrieved September 21, 2015.
^ Bryant Frazer (June 9, 2015). “Colorist Stephen Nakamura on Grading Tomorrowland in HDR”. studiodaily. Retrieved September 21, 2015.
^ Rachel Cericola (August 27, 2015). “What Makes a TV HDR-Compatible? The CEA Sets Guidelines”. Big Picture Big Sound. Retrieved September 21, 2015.
^ “High Dynamic Range and Wide Color Gamut (Windows)”. msdn.microsoft.com.
^ Dolby Laboratories. “Dolby Vision” (PDF). Retrieved August 24, 2016.
^ “SMPTE ST 2094 and Dynamic Metadata” (PDF). Society of Motion Picture and Television Engineers. Retrieved January 25, 2017.
^ Caleb Denison (January 28, 2016). “Ultra HD Blu-ray arrives March 2016; here’s everything we know”. Digital Trends. Retrieved July 27, 2016.
^ Michael S. Palmer (February 10, 2016). “Hands On First Look: Samsung UBD-K8500 Ultra HD Blu-ray Player”. High-Def Digest. Retrieved July 27, 2016.
^ “Dolby Vision”. Dolby.com. Retrieved April 26, 2012.
^ “Dolby Vision FAQ”. yoeri.geutskens.com.
^ January 2020, Becky Roberts 22. “Dolby Vision IQ: everything you need to know”. whathifi. Retrieved August 19, 2020.
^ Jump up to: a b “ICtCp Dolby White Paper” (PDF). Dolby. Retrieved April 20, 2016.
^ Jan Froehlich; Timo Kunkel; Robin Atkins; Jaclyn Pytlarz; Scott Daly; Andreas Schilling; Bernd Eberhardt (October 18, 2015). “Encoding Color Difference Signals for High Dynamic Range and Wide Gamut Imagery” (PDF). Society for Imaging Sciences and Technology. Retrieved August 26, 2016.
^ “Dolby Digital Cinema”. Dolby.com. Retrieved April 26, 2012.
^ “Dolby Surround 7.1”. Dolby.com. Retrieved November 11, 2020.
^ Dolby 3D Movie Technology Archived July 8, 2009, at the Wayback Machine. professional.Dolby.com. Retrieved on 2013-12-09.
^ Content Creators, Distributors, Exhibitors: Introducing Dolby Atmos™. Dolby.com. Retrieved on 2013-12-09.
^ Dolby Cinema the Total Cinema Experience. Dolby.com Retrieved on 2014-12-17.
^ “Dolby Lake Processor” (PDF). Retrieved April 26, 2012.
^ “About Lake”.
External links[edit]
Official website
Dolby companies grouped at OpenCorporates
en.wikipedia.org /wiki/Dolby
Dolby
Contributors to Wikimedia projects22-28 minutes 2/1/2004
Dolby Laboratories, Inc.
Dolby logo 2019.svg
Dolby Laboratories, Inc. headquarters in San Francisco (TK1).jpg
Dolby’s corporate headquarters in San Francisco, California
Type Public
Traded as
NYSE: DLB (Class A)
Russell 1000 Component
Industry Audio encoding/compression
Audio noise reduction
Founded May 18, 1965; 56 years ago in London, England
Founder Ray Dolby
Headquarters
Civic Center, San Francisco, California
,
U.S.
Number of locations
30+ (2014)
Area served
Worldwide
Key people
Peter Gotcher
(Executive chairman)
Kevin Yeaman
(President and CEO)
Products see Technologies
Organizations
Dolby Digital
Brands
Dolby Surround/Pro Logic/Pro Logic II
Dolby SR
Dolby Stereo
Dolby Surround 7.1
Dolby noise-reduction system
Services Dolby Cinema
Revenue Increase US$1.082 billion (2017)[1]
Operating income
Increase US$248.64 million (2017)[1]
Net income
Increase US$201.80 million (2017)[1]
Total assets Increase US$2.534 billion (2017)[1]
Total equity Increase US$2.137 billion (2017)[1]
Number of employees
2,289 (2020)
Subsidiaries Audistry[3]
Via Licensing
.
Website
www.dolby.com
.
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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