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What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.




H.H. Scott '59





Showing posts with label digital recorder. Show all posts
Showing posts with label digital recorder. Show all posts

Tascam DA-45HR DAT recorder

Here's the new standard in audio mastering technology. The Tascam DA-45HR is the worlds first 24-bit high resolution DAT recorder. It combines stunning audio performance with a rugged transport, advanced features and backward compatibility with standard 16-bit DAT.

A full audio I/O complement and word sync in/thru provide all the tools to integrate into any analog or digital studio of any size. Perfect for studios and mastering houses, the DA-45HR bridges the gap between the 16 bit and 24 bit worlds with a familiar interface you already know.

 

The 24 bit format DAT uses the same DAT tape that is used in standard DAT recorders. In order to store the extra data generated by higher resolution recording, the tape speed is doubled in HR (High Resolution) mode. So, when you're recording in 24 bit HR mode, a standard 120 minute tape will last 60 minutes. Obviously, 24 bit DAT tapes will only play back on a 24 bit DAT recorder like the DA-45HR.

The DA-45HR can also run just like a standard 16 bit DAT recorder, running normal speed and writing 16 bits to the tape. Reading and writing is fully supported, so you won't have to dig out a different DAT recorder for anything else.

 


Specifications:

Tape Speed:  SP - 8.15 mm/s; HR - 16.3 mm/s

Recording Time (120 DAT):  SP - 120 minutes; HR - 60 minutes

Recording Resolution:  SP - 16 bit; HR - 24 bit

Recording Sample Rate:  44.1 kHz, 48 kHz

Frequency Response:  20 Hz- 20 kHz ±0.5 dB (SP & HR modes)

Signal to Noise Ratio: 

Better than 105 dB Playback (SP)

Better than 112 dB Recording, 105 dB Overall (HR)

Total Harmonic Distortion: 

Less than 0.005% Playback (SP)

Less than 0.002% Recording, less than 0.004 Overall (HR)

Wow and Flutter:  Unmeasurable (less than 0.001%)

Channel Separation:  better than 95 dB (1 kHz at Full Scale)

Input RCA: 

-10 dBV, 50 k Ω 

+6 dBV Maximum (2 V rms)

Input XLR: 

+4 dBu, 10 k Ω   (-16 dB, -18 dB, -20 dB Full Scale)

+20 dBV, +22 dBV, +24 dBV Maximum

Output RCA: 

-10 dBV, less than 700 Ω 

+6 dBV Maximum (2 V rms)

Output XLR: 

+4 dBu, 27 Ω   (-16 dB, -18 dB, -20 dB Full Scale)

+20 dBu, +22 dBu, +24 dBu Maximum

AES/EBU I/O:  XLR-type, IEC60958 Type I (AES/EBU)

SPDIF Coaxial I/O:  RCA pin, IEC60958 Type II (SPDIF)

Headphone Output:  2x50 mW into 32 Ω 

Word Sync IN/THRU:  75 Ω   (auto-terminating)

Control Ports:  1/8" mini plug accepts RC-D45 remote DB15 Parallel I/O

General Specifications:

Power Requirements:   

120 V AC, 60 Hz (USA/Canada Model); 

230 V AC, 50 Hz (UK/Europe Model); 

240 V AC, 50 Hz (Australia Model)

Power Consumption:  40W

Dimensions:  482 x 140.5 x 368 mm (19" x 5.5" x 14.5")

Weight:  8.3Kg, 18.25 lbs.

Optional Accessories:  Wired Remote (RC-D45)


 

Denon DTR-2000

 DTR-2000 is one of the first DAT (Digital Audio Tape)Recorder  created for consumer users . By incorporating the SCMS (Serial Copy Management System), it enables users to make as many direct, first-generation digital dubs of CD's and other digital program sources as they wish, while limiting the ability to make digital copies of copies.
It also features an advanced version of Denon's 20-bit Super-Linear D/A (digital-to-analog) converter, called the lambda SLC.  The DTR-2000 comes with full-function remote control and complements ita analog connectors with both optical and coaxial digital inputs and outputs. While a number of manufactures have adopted one form or another of 1-bit D/A conversion. Denon has chosen instead to remain with the eight-times-oversampling, 20-bit Lambda SLC system, originally developed for its top CD players. 
 The Lambda enhancement is designed to minimize the zero-crossing distortion that is characteristic of most multibit D/A converters. Non-linearity is reduced still further by very careful factory adjustment of the converter's  MSB (most-significant-bit) registers. At the other end of the process, ahigh-speed analog-to-digital converter is used to quantize analog input signals.

The transport mechanism inside the deck is similar to that of a miniature VCR and uses the same helical-scan principle. The high tape-to-head speed needed for mutimegahertz frequency response, is achieved with a pair of heads mounted in a rapidly rotating drum set at an angle to the longitudinal direction of the tape.
 Features:
Optical and coaxial digital input and outputs as well as analog inputs and outputs
Sigma/Delta A/D converters
Lambda SLC 20-bit D/A converters with eight-times oversampling
22-segment per channel peak-level display with Over indicator
Digital readout of elapsed time from start of tape, remaining time on tape, elapsed time in current selection, or linear tape counter
Direct acces to selections up to No. 99
Editable Start, Skip, and End ID subcode markers with fine-cue control and renumbering facility
Full-function remote control
Two fast-winding modes (250 and 400 times normal speed) plus cue-and-review
Adjustable digital fader
Supports standard 48- and 44,1 kHz  sampling rates and half-speed (32 kHz) mode
Three-step display brightness control
Can be activated by external timer
Specifications:
Type:  Rotary head DAT deck
Tape Speed:  8,15 mm/s
Fast-forward/rewind Time C-120
Normal :  39 seconds
High-speed :  27 seconds
Speed Error:  0,02%
Line Input (indicated 0 dB):  0,56 volt
Line Output (indicated 0 dB):  2,11 volts
Sampling Frequencies:
Recording:  32 kHz, 48 kHz, 44,1 kHz
Playback :  32 kHz, 44,1 kHz, 48 kHz
Head:  Amorphous Head
Total Frequency Response:
Standard Mode:  2 Hz to 22 kHz ±0,5 dB
Total Signal-to-Noise ratio:  90 dB
Total Dynamic Range:  90 dB
Total Harmonic Distortion:  0,008%
Wow and Flutter:  below measurable limits
Power Supply:  110 V, 120 V - 220 V , 240 V, 50/60 Hz
Power Consumption:  18 W
Dimensions (W x H x D):  434 x 122 x 320 mm (17-3/32" x 4-51/64" x 12-19/32")
Weight:  7,2 kg
Remote Control Unit:  RC-409

Technics SV-P100

 For home and studio digital recording appilcations Technics presents the SV-P100 , a wholly self-contained unit with built-in VHS tape mechanism. The Technics SV-P100  is the most compact digital recording system in existence. lt has everything you need to start making the highest quality recordings you've  ever heard. Advanced semiconductor circuitry provides  outstanding performance in a compact package. Plus you enjoy versatile digital  editing features. W ith all this state-of-the-art technology, you'll  be happy  to find that the SV-P100 is just as easy to use as an ordinary cassette deck-perhaps easier.
 High-Density LSls for Compact Size
State-of-the-art semic onductor technology is the  key to the compact dimensions of the SV-P100, the world's smallest digital recording system. Three original  LSI c hips handle virtually  all  of the signal  processing including digital-to-analog and analog-to-digital conversion. They also take care of error detection,  error correction, video signal modulation and time-base correction. Since these take the place of thousands of transistors and hundreds of  lCs, circuit size is dramatically reduced.

Built-in VHS Mechanism
Built into the SV-P100 is a very high quality VHS video tape transport mechanism with advanced video heads and quartz locked direct drive motors. Basic operation is just like on a conventional cassette deck, with the comfort of microcomputer feather-touch control keys. You simply put a cassette into the front loading compartment and press the rec and play buttons together to begin recording. The cassette door is motor driven for smooth, silent operation when you want to load or eject a cassette.
Multi-FunctioN Display
There's adigital LCD tape counter display, bright FL recording/playback level display, and indication for all functions that you might need. The FL  level display uses fluorescent display tubes to provide very accurate indication of recording level. Besides instantaneous peak indication, it also has  peak-hold which shows  you the highest signal peaks reached in each 2 -second period. T his makes it much easier to set optimum recording level. Another valuable feature is the playback data check indication which gives you a readout of playback signal quality
 Versatile Editing
Since the digital signal is recorded on the tape's video tracks, the space usually used for audio is left free. The SV-P100 uses these extra tracks for "jump" and" search" marks.  This gives you a kind of electronic editing ability that is not possible in ordinary cassette decks. Record a jump mark along a specific section of the tape and the deck will automatically bypass that section at 8 times normal speed.  Normal playback resumes after the end of the  jump mark. This is useful when you want to skip over undesired portions of a recording. Search marks let you rapidly locate specific points on the tape. The tape will advanced to the nearest search mark at 8 times normal speed and then stop. lf you press the play key with the search key, then playback will begin when the search mark is reached.
You can record as many search and jump marks as you want, using the convenient editing levers. Since these marks remain on the tape, you can take advantage of this convenience every time you listen to a recording. Of course you can also selectively erase search and jump marks (by pressing the "clear" lever) as required.
In addition to all this,you have the "locate" function which serves as a memory linked to the tape counter. But unlike on conventional cassette decks,  you don't have to set the counter to zero. This memory stores the actual tape counter number at the instant you press the locate button. The tape will then stop (or begin play)att he memorized position. You can also check the locate memory position by pressing the recall button.
 Other Features
Large fader knob for smooth fade-in and fade-out effects.
Digital input and  output terminals for making digital tape copies usinga nother SV-P100.
Angled control panel with status indicator LEDs.
Headphone and microphone jacks on front panel.
High quality microphone amp built-in for superior live recording quality.
Recessed power switch helps avoid accidental on/off switching.
Automatic recording possible with audio timer.
Dew (condensation) display and protection circuitry
Tracking adjustment for optimum playback of tapes recorded on other equipment.

Specifications
Type:  Digital audio cassette recorder
PCM Standard:  By technical File -- STC-007
Quantization:  Linear 14-bit
Decoding:  Linear 14-bit
Tape: VHS type video cassette
Signal Format:  Standard NTSC television; signal by VHS standard
Recording Time:  About 2-hour max.  (Using NV-E180)
Channels:  2 (L, R)
Frequency Response:  2 Hz  - 20 kHz (±0,5 dB)
Harmonic Distortion:  less than 0,01% (1 kHz, 0 dB)
Dynamic Range:  More than 86 dB
Input Sensitivity/Impedance: 
Line :  30 mV (-15 dB) / 50 kΩ
Microphone :  0,7 mV (-15 dB) / 600 Ω
Digital :  1 Vp-p / 75 Ω (Video format)
Output Level/Impedance
Line :  400 mV (-15 dB) / 600 Ω
Digital :  1 Vp-p / 75 Ω (Video Format)
Remote Control Terminal:  8 pin DIN terminal
Edit Function: 
Jump, Search,
Memory, Memory recall, Playback data  check,
Tracking adjustment,
Timer recording & 1-hour delay recording;
Digital recording terminals,
Headphone and microphone jacks
General
Power Supply:  AC 110/120/220/240 V, 50/60 Hz
Power Consumption:  90 W
Dimensions (W x H x D):  430 x 278 x 346 mm

Weight:  21 kg