AEC C-39 Dynamic Processor Phau Ntawv Qhia

AEC C-39 Dynamic Processor

Dab tsi tshwm sim rau Dynamic Range thiab Yuav Ua Li Cas Restore nws

Hauv kev hais kwv txhiaj, lub suab nrov ntawm symphony orchestra's nrov tshaj plaws fortissimos tej zaum yuav ntau npaum li 105 dB * suab siab, nrog rau siab tshaj qhov ntawd. Pob zeb pawg hauv kev ua neej nyob feem ntau tshaj 115 dB suab siab. Los ntawm qhov sib txawv, ntau cov ntaub ntawv suab paj nruag tseem ceeb muaj ntau dua harmonics hnov ​​​​ntawm cov qib qis heev. Qhov txawv ntawm qhov nrov tshaj plaws thiab qhov ntsiag to ntawm cov suab paj nruag yog hu ua dynamic range (qhia hauv dB). Qhov zoo tshaj plaws, txhawm rau sau cov suab paj nruag nyob tsis muaj suab nrov lossis cuam tshuam, qhov nruab nrab kaw yuav tsum ua kom muaj qhov sib txawv ntawm yam tsawg kawg 100 dB nruab nrab ntawm cov suab nrov tom qab ntawm cov khoom siv thiab cov teeb liab siab tshaj plaws ntawm qhov distortion yuav hnov. Hmoov tsis zoo, txawm tias tus kws tshaj lij studio daim kab xev kaw tau muaj peev xwm tsuas yog 68 dB dynamic ntau yam. Txhawm rau kom tsis txhob hnov ​​​​qab distortion, theem teeb liab siab tshaj plaws uas tau sau tseg rau ntawm studio master daim kab xev yuav tsum muaj qhov kev nyab xeeb ntawm tsib mus rau kaum dB hauv qab ntawm cov suab distortion. Qhov no txo ​​qhov kev siv tau zoo li qub rau qee qhov 58 dB. Daim kab xev kaw yog li yuav tsum tau sau ib qho kev pab cuam suab paj nruag nrog ib tug dynamic ntau yam nyob rau hauv dB ntawm ze li ntawm ob zaug nws tus kheej muaj peev xwm. Yog hais tias suab paj nruag nrog 100 dB dynamic ntau yog kaw rau ntawm daim kab xev kaw nrog 60 dB ntau yam, tog twg los sab saum toj 40 dB ntawm lub suab paj nruag yuav raug horribly distorted, hauv qab 40 dB ntawm cov suab paj nruag yuav faus rau hauv daim kab xev suab nrov thiab yog li npog, los yog yuav muaj kev sib koom ua ke ntawm ob. Kev lag luam kaw cov kev daws teeb meem ib txwm ua rau qhov teeb meem no tau txo qis kev txhob txwm tshaj tawm cov ntsiab lus ntawm cov suab paj nruag thaum kaw. Qhov no txwv tsis pub muaj ntau yam suab paj nruag kom poob rau hauv lub peev xwm ntawm daim kab xev kaw, tso cai rau cov suab ntsiag to feem ntau raug kaw saum cov kab xev suab nrov, thaum kaw suab nrov ntawm qib ntawm daim kab xev uas tsuas yog me ntsis (txawm hais tias audibly) distorted. Lub dynamic ntau yam ntawm ib qho kev pab cuam tuaj yeem txhob txwm txo qis hauv ntau txoj hauv kev. Tus neeg xyuas pib tuaj yeem qhia lub suab paj nruag kom tsis txhob ua si nrov dhau lossis nyob ntsiag to thiab yog li tsim ib qho kev txwv tsis pub muaj rau lub studio microphones tuaj tos Hauv kev xyaum, qhov no yuav luag ib txwm ua rau qee qhov kev kawm, tab sis qhov yuav tsum tau txo qis ntawm 40 mus rau 50 dB tsis tuaj yeem. ua tiav yam tsis muaj kev txwv ntau dhau ntawm cov kws ntaus nkauj, ua rau kev ua yeeb yam tsis zoo. Ib txoj hauv kev ntau dua ntawm kev txo cov dynamic ntau yog rau cov neeg ua haujlwm kaw lus los hloov kho qhov dynamic ntau los ntawm kev siv phau ntawv thiab kev tswj tsis siv neeg nce.

A more common method of reducing the dynamic range is for the recording engineer to modify the dynamic range through the use of manual and automatic gain controls. studying the musical score that a quiet passage is coming, he slowly increases passan as the paste any increases an o prevent its being recorded below the level of the tape noise. If he knows that a loud passage is coming, he slowly reduces the gain as the passage approaches to prevent its overloading the tape and causing severe distortion. By “gain riding” in this manner, the engineer can make substantial changes in dynamics without the average listener perceiving them as such. As the dynamic range is reduced by this technique, how- ever, the recording will not have the excitement of the original live performance. Sensitive listeners can usually sense this deficiency, even though they may not be consciously aware of what is missing. The automatic gain controls consist of electronic signal processing systems called compressors and limiters that modify the signal level recorded on tape. A compressor reduces the dynamic range in a gradual manner by gently reducing the level of loud signals, and/or increasing the level of quieter signals. A limiter acts more drastic- ally to restrict any loud signal that exceeds some preset level. This prevents distortion due to the overloading of the tape on loud program peaks. Another dynamic range modifier is the magnetic tape itself. When tape is driven into saturation by high level signals, it tends to round off the peaks of the signals, and acts as its own limiter by restricting high level signals. This causes some distortion of the signal, but the gradual nature of tape saturation results in a type of distortion which is tolerable to the ear, so the record- ing engineer permits a certain amount of it to occur to keep the entire program as high above the tape noise level as possible and thus obtain a quieter recording. Tape satu- ration results in the loss of the sharp edge of percussive attacks, softening of the strong, biting overtones on instruments, and a loss of definition in loud passages when many instruments are playing together. The result of these various forms of dynamic range reduction through signal “tampering" yog hais tias lub suab yog dis- tso los ntawm lawv thawj dynamic kev sib raug zoo. Crescendos thiab nrov variations uas muaj cov ntaub ntawv suab paj nruag tseem ceeb tau raug txo kom tsawg, cuam tshuam qhov muaj thiab kev zoo siab ntawm kev ua yeeb yam nyob.

Kev siv dav dav ntawm 16 lossis ntau dua cov kab xev kaw kuj ua rau muaj teeb meem ntau yam. Thaum 16 daim kab xev sib xyaw ua ke, cov kab xev ntxiv suab nrov ntxiv los ntawm 12 dB, txo qhov kev siv tau ntau yam ntawm lub kaw lus los ntawm 60 dB txog 48 dB. Raws li qhov tshwm sim, tus kws sau xov xwm siv zog los sau txhua qhov kev sib tw ntawm qib siab li sai tau kom txo qis qhov cuam tshuam ntawm lub suab nrov.

Txawm hais tias daim kab xev tiav tiav tuaj yeem muab tag nrho cov dynamic ntau yam, lub suab paj nruag yuav tsum thaum kawg, raug xa mus rau cov pa disc uas muaj, albest, 65 dB dynamic ntau yam. Yog li, peb tseem muaj qhov teeb meem ntawm lub suab paj nruag dynamic ntau dhau heev uas yuav tsum tau txiav rau ntawm ib qho kev lag luam uas siv tau. Ua ke nrog qhov teeb meem no yog lub siab xav ntawm cov tuam txhab cov ntaub ntawv thiab cov neeg tsim cov ntaub ntawv kom muaj cov ntaub ntawv txiav tawm ntawm qib siab li sai tau, ua kom lawv cov ntaub ntawv nrov dua li ntawm lawv cov neeg sib tw. Yog tias tag nrho lwm yam tseem ceeb nyob tas li, cov ntaub ntawv nrov dua feem ntau suab zoo dua (thiab "zoo dua") tag nrho dua li qhov ntsiag to. Cov chaw xov tooj cua tseem xav tau cov ntaub ntawv txiav ntawm cov qib siab kom lub suab nrov ntawm lub disc, pops thiab clicks yuav tsis hnov ​​​​ntawm huab cua.

Qhov kev zov me nyuam kaw tau pauv los ntawm daim kab xev rau tus tswv disc los ntawm kev txiav stylus uas txav ntawm sab mus rau sab thiab nce thiab nqis raws li nws sau cov grooves ntawm tus tswv disc. Qhov siab dua qhov teeb liab, qhov deb ntawm lub stylus txav. Yog hais tias lub stylus excursions zoo heev, grooves nyob ib sab tuaj yeem txiav mus rau hauv ib leeg ua rau muaj kev cuam tshuam, zawj ncha, thiab hla ntawm kev ua si. Txhawm rau zam qhov no, cov grooves yuav tsum tau sib nrug deb dua thaum cov cim theem siab raug txiav, thiab qhov no ua rau lub sijhawm ua si luv dua rau cov ntaub ntawv txiav ntawm qib siab. Txawm hais tias cov grooves tsis txhob kov ib leeg, cov teeb liab siab heev tuaj yeem ua rau muaj kev cuam tshuam thiab hla vim qhov tsis muaj peev xwm ntawm qhov kev ua si rov qab los ua raws li cov kev taug kev loj heev. Thaum cov caj npab zoo thiab cov cartridges zoo yuav taug qab cov kev mus ncig ua si loj, pheej yig "cov ntaub ntawv cov neeg ua si" yuav tsis, thiab cov ntaub ntawv manufac*) Lub dB lossis decibel yog ib chav ntsuas rau qhov sib txawv ntawm lub suab nrov. Nws yog feem ntau piav raws li qhov tsawg tshaj plaws yooj yim nrhiav tau hloov pauv hauv nrov. Lub sijhawm pib ntawm kev hnov ​​​​lus (lub suab nrov tshaj plaws uas koj tuaj yeem pom) yog li 0 dB, thiab qhov mob pib (lub ntsiab lus uas koj lub pob ntseg npog) yog li 130 dB suab siab.

Kev nthuav dav. Kev Xav Tau, Kev Ua tiav

Qhov kev xav tau ntawm kev nthuav dav hauv cov tshuab suab zoo tau ntev tau lees paub.

Nyob rau xyoo 1930, thaum compressors thawj zaug muaj nyob rau hauv kev lag luam kaw, lawv qhov kev lees paub yog kev zam. Compressors tau npaj cov kev daws teeb meem rau cov teeb meem tseem ceeb - yuav ua li cas kom haum rau cov discs, uas tuaj yeem txais qhov siab tshaj plaws ntawm tsuas yog 50 dB, cov khoom siv uas qhov kev hloov pauv hloov tau los ntawm qib mos ntawm 40 dB mus rau qib nrov ntawm 120 dB. Qhov twg yav dhau los nrov theem ua rau overload distortion (thiab cov qib muag muag tau ploj hauv lub suab nrov tom qab), lub tshuab hluav taws xob tam sim no tau ua kom tus kws tshaj lij ua cov lus nrov nrov softer thiab cov lus muag nrov dua. txiav txim. Nyob rau hauv qhov tseeb, dynamic kev muaj tiag tau hloov kho kom haum rau cov kev txwv ntawm lub xeev ntawm cov kos duab. Nws tsis ntev los no tau pom tseeb tias lub suab tiag tiag los ntawm cov kev txwv tsis pub kaw no tau thov kom muaj kev hloov pauv ntawm cov txheej txheem compression - nthuav dav - txhawm rau kho qhov tseeb dynamic. Qhov xwm txheej ntawd tseem tsis hloov hnub no. Hauv 40 xyoo dhau los, ntau qhov kev sim tau tsim los tsim cov neeg nthuav dav. Cov kev sim no tau ua tsis tiav, qhov zoo tshaj plaws. Lub pob ntseg kawm ntawv, zoo li, yog me ntsis siab ntev ntawm kev ua yuam kev uas tshwm sim hauv compression; expansion faults, txawm li cas los xij, yog qhov pom tseeb tseeb. Lawv tau suav nrog cov twj tso kua mis, theem tsis ruaj khov thiab kev cuam tshuam - tag nrho cov no yog qhov tsis txaus ntseeg. Yog li tsim qhov kev nthuav dav zoo uas tshem tawm cov kev mob tshwm sim no tau ua pov thawj tias yog lub hom phiaj tsis pom. Txawm li cas los xij, lub hom phiaj ntawd tau ua tiav tam sim no. Yog vim li cas peb lees txais qhov kev poob ntawm kev ua haujlwm tsis muaj zog yam tsis muaj kev tawm tsam yog vim qhov tseeb psychoacoustic nthuav. Txawm hais tias lub suab nrov thiab cov suab nrov tau raug compressed rau qib zoo sib xws, pob ntseg tseem xav tias nws tuaj yeem pom qhov sib txawv. Nws ua - tab sis, nthuav, qhov sib txawv tsis yog vim muaj kev hloov pauv ntawm qib tab sis mus rau kev hloov pauv hauv cov qauv kev sib haum xeeb Cov suab nrov tsis yog qhov muaj zog dua ntawm cov suab nrov. Raws li ntim nce, tus nqi thiab lub zog ntawm cov overtones nce proportionately. Hauv kev mloog, pob ntseg txhais cov kev sib txawv no thaum lub suab hloov pauv. Nws yog cov txheej txheem no uas ua rau compression tau txais. Qhov tseeb peb lees txais nws zoo heev uas, tom qab kev noj zaub mov ntev ntawm lub suab nrov, cov suab paj nruag nyob yog qee zaum poob siab rau nws qhov cuam tshuam. AEC Dynamic Processor yog qhov tshwj xeeb hauv qhov ntawd, zoo li peb lub pob ntseg-hlwb, nws muab ob qho tib si cov ntaub ntawv sib haum xeeb nrog amplitude hloov raws li ib tug tshiab thiab singularly zoo mus kom ze rau kev tswj expansion. Qhov tshwm sim yog tus qauv tsim uas kov yeej cov kev cuam tshuam yav dhau los kom ua tiav qib ntawm kev ua tau zoo tsis tau ua ntej. AEC C-39 inverts lub compression thiab ncov txwv tam sim no nyob rau hauv yuav luag tag nrho cov ntaub ntawv rov qab nrog zoo kawg li fidelity tus thawj kev pab cuam dynamics. Tsis tas li ntawd, cov kev txhim kho no yog nrog los ntawm kev txo qis suab nrov - qhov cim txo qis hauv hiss, rumble, hum thiab tag nrho cov suab nrov tom qab. Lub advantages ntawm AEC C-39 tuaj yeem ua qhov sib txawv tseem ceeb rau kev mloog. Dynamic contrasts yog qhov tseem ceeb ntawm ntau yam uas zoo siab thiab nthuav tawm hauv suab paj nruag. Txhawm rau kom paub txog qhov cuam tshuam tag nrho ntawm kev tawm tsam thiab kev hloov pauv, txhawm rau nrhiav pom cov ntsiab lus zoo uas koj tsis paub txawm tias muaj nyob hauv koj cov ntaub ntawv kaw tseg yog txhawm rau txhawb ob qho kev nyiam tshiab thiab kev tshawb pom tshiab hauv txhua qhov ntawm lawv.

Nta

• Kev sib txawv tsis tu ncua kev nthuav dav rov qab mus txog 16 dB ntawm kev ua kom zoo rau txhua qhov kev pab cuam; cov ntaub ntawv, daim kab xev, los yog oroadcast.
• Zoo txo ​​tau tag nrho cov suab nrov hauv qab qis-hs, rumble, thiab hum. Tag nrho cov teeb liab rau kev txhim kho suab nrov txog li 16 dB.
• Exceptionally tsawg distortion.
• Ua ke nrog nce thiab nqis zuj zus ntxiv nrog qhov siab tshaj plaws kom rov qab tau cov ntu ntu thiab cov ntsiab lus zoo nrog rau qhov sib txawv ntawm qhov sib txawv ntawm qhov tseeb.
• Yooj yim teeb tsa thiab siv tau. Expansion tswj yog tsis tseem ceeb thiab calibration tsis tas yuav tsum tau.
• Fast teb LED zaub kom raug taug qab kev ua haujlwm.
• Txhim kho lub tso suab duab thiab tus neeg mloog lub peev xwm los paub qhov txawv ntawm txhua lub twj paj nruag lossis lub suab.
• Ob txoj kab nqes nqes mus tswj kev nthuav dav kom phim qhov tseeb ntawm ob qho tib si nruab nrab thiab compressed heev.
• Ua tiav zoo kawg nkaus kho cov ntaub ntawv qub.
• Txo kev mloog qaug zog ntawm qib siab playback.

Specifications

AEC C-39 Dynamic Processor / Specifications

Ua tsaug rau koj txaus siab rau AEC C-39 Dynamic Processor. Peb txaus siab rau peb cov khoom. Peb xav tias nws yog undoubtedly lub finest expander nyob rau hauv lub lag luam hnub no. Tsib xyoos ntawm kev tshawb fawb hnyav tau mus rau hauv kev tsim nws - kev tshawb fawb uas tsis tsuas yog tsim cov thev naus laus zis tshiab hauv kev nthuav dav tsim tab sis ua rau ob daim ntawv tso cai, nrog rau qhov thib peb tseem tos. Peb yaum kom koj sib piv AEC C-39 nrog rau lwm qhov nthuav dav hauv thaj chaw. Koj yuav pom tias nws zoo kawg nkaus tsis muaj cov twj tso kua mis thiab distortion los ntawm lwm cov units raug kev txom nyem. Hloov chaw koj yuav hnov ​​​​ib qho tshwj xeeb thiab raug kho dua tshiab ntawm qhov qub dynamics thiab cov ntsiab lus zoo uas compression tau tshem tawm. Peb yuav txaus siab hnov ​​koj tus kheej cov lus teb rau peb cov khoom thiab, yog tias koj muaj lus nug ntxiv, sau ntawv rau peb txhua lub sijhawm.