8-channel digital recorder
The Nagra VI is an 8-channel digital recorder, offering 24 bit wordlength and sampling frequencies from 32 kHz up to 192 kHz. There are 6 analog inputs, 4 of which are equipped with high-quality Nagra microphone preamplifiers and 2 AES inputs. Equipped as standard with a full SMPTE/EBU time code sytem including a chase synchronizer, iXML metadata, programmable digital filters and monitoring for Ambisonic microphones.
Nagra VI digital audio recorder was awarded the TEC Award for “Outstanding Technical Achievement” at a ceremony in New York on Saturday October 10th 2009 during the 127th AES show.
納格拉VI是一台8軌數字錄音機, 提供24bit字長以及從32k到192kHz採樣率. 他有6個類比輸入, 4個裝載高品質的納格拉麥克風前級放大器及2個AES輸入. 標準搭載全整的包含同步器的SMPTE/EBU時間碼系統, iXML元數據, 可編程數字濾波器以及對Ambisonic麥克風的監視功能. 納格拉VI數字音頻錄音機於2009年10月10日星期六在紐約舉辦的第127屆AES展中榮獲”卓越技術成就獎”.
The Nagra VI uses a design concept where the hardware is software dependent and can be adapted simply through firmware programming. The principal recording media is an 120GB internal hard disk, which can be replaced with an SSD if desired. Removable Compact Flash cards serve as the removable media. All main functions are located on the front panel of the recorder, and all set-up features are accesses through ergonomic menus and shown on the 3.5″ TFT sunlight-readable display. The Nagra VI is fitted with an interchangeable lithium-ion battery pack, and supplied with a mains power supply for charging. Available with a machined aluminium front panel, or in a choice of three plastic fronted colors (“Slate” grey, “Midnight” blue and “Burgundy” red) and is supplied with two plastic handles which also serve to protect the front of the unit from accidental damage. A carrying case and strap for over-the-shoulder operation and a pair of legs to incline the recorder for easier table-top operation are also supplied.
納格拉VI的設計理念是硬體由軟體設定, 軟體由固件升級. 最主要的錄音媒介是一個內置的120GB硬碟, 如果需要也可以將此硬碟換成SSD. 也提供可外插的快閃記憶體. 在前面板能找到所有主要功能, 其人性化的菜單設計讓所有的設定都能透過3.5吋TFT陽光下可視的螢幕完成. 納格拉VI中的鋰電池是可更換的, 也可透過內部的電源進行充電. 納格拉VI使用鋁製面板, 另有三種塑膠面板顏色供你選擇. (灰,藍,紅), 亦配有2個塑膠手把以保護前面板受到外力衝擊受傷. 納格拉VI的專屬斜背包可讓其在外出使用時方便執行所有功能.
It offers six independent analog audio inputs. Inputs 1 – 4 are equipped with traditional Nagra microphone preamplifiers for dynamic and phantom +48V microphones and menu selectable sensitivity for different microphone types. These preamplifiers are a combination of those developed for the Nagra V and Nagra-D. An audio limiter can be selected for each of the microphone inputs and can be ganged in pairs if desired. The four “In-house” transformers offer fully floating inputs for the dynamic microphones, giving a greatly improved signal-to-noise ratio. The remaining two analog inputs are LINE level for connection to other equipment supplying a line level signal, such as radio receivers. When set to the LINE position all 6 analogue inputs will accept up to +24dB. The two input connections (channels 5 + 6) double up as AES inputs (A and B) when selected to digital input mode. A total of 8 channels can be recorded; 6 audio inputs + a two channel mix, or 8 inputs assuming both AES inputs are used for 4 digital inputs.
他提供6個獨立的類比音頻輸入. 輸入1到4裝載傳統納格拉麥克風前級放大器,可供動圈跟幻影+48V麥克風使用, 菜單中可為不同的麥克風種類選定合適的靈敏度. 這些前級放大器是搭配納格拉V跟納格拉-D使用時所設計的. 一個音頻限制器可供單一個麥克風輸入使用也可以成組使用.
Zipper noise suppression
The Nagra VI does not use traditional logarithmic potentiometers for the audio levels as were traditionally used on previous Nagra models. Today digital “encoders” are preferable because they do not suffer from “crackling” noise problems, and can be programmed to fulfill a multitude of different operations depending on the software program controlling them. Equally, even the graduation of the sweep is software calculated and can be altered relatively easily, rather than being created by the precision winding of the internal coils during manufacturing. However, such encoders often suffer from a phenomena known as the “Zipper” noise. The NAGRA VI benefits from a complex development in a suppression system used on every level control of the recorder. The end-result is that the potentiometers can be moved instantaneously and no digital zipper effect can be heard. The potentiometers on the Nagra VI behave in exactly the same manner as the traditional logarithmic potentiometers used in Nagra analog recorders but with the advantage of the precision offered by digitally controlled encoder devices, and hence an increase the perfection of all recordings.
NAGRA VI不像以往的NAGRA产品一样用对数电位器来控制音频电平。现在大家都倾向于数字电平控制来避免传统电位器的摩擦噪声。并且用这个数字旋钮来完成更多的功能。软件让它干什么，它就干什么。公平讲，虽然软计算的电平值容易控制，但是这种计算方式通常会带来“拉链”噪声。NAGRA VI用一种复杂的方式抑制了这种噪声。结果就是通过数字方式调整电平的时候，不会听到连续的小爆音。NAGRA VI内的数字电位器在使用效果上和传统的纯模拟NAGRA录音机一样，但是数字电位器更精确。从此录音效果更完美。
The left side panel clearly shows not only the analogue and digital audio input connections, but also the external 4 pole XLR DC input socket, allowing the NAGRA VI to be externally powered from an external DC power source such as a car battery. The 5-pin LEMO SMPTE/EBU time code In/Out can also be seen as well as the two HIROSE connectors used for powering external accessories such as radio receivers. These two connectors can supply up to 1 A at 12V.
The right side of the recorder is where the removable compact flash card is located. A LED next to the slot indicates when the card is accessed. The stereo analogue outputs, and the main AES out as well as the second headphone connector can be clearly seen. Additional AES outputs are located on the 15 pin Extension connector. The Start / Stop terminal is a fader start (contact closure) command as found on other Nagra recorders. Two USB (host / device) connectors are also located on the right side next to the card slot. The host connector allows the connection of an external USB drive (USB keyboard, USB key drive, external hard drive or DVD-RAM burner) and the slave connector allows the Nagra VI to appear as an additional drive(s) on a PC or MAC. An optional second USB port is available (as shown on the photograph above) allowing both an external USB drive AND a keyboard to be connected simultaneously, but this should be specified when ordering.
Recording medium and format
The Nagra VI records to a 120GB internal 2.5″ hard disk. An extractable compact Flash card is used to record a copy of the audio tracks depending on the users track selections. The Nagra VI allows approximately 15 minutes of 8-track 48 kHz 24-bit recording per GB of available disk / card space. The compact flash card section is equipped with a “Hot-Swap” possibility meaning that the CF card can be removed and replaced while the Nagra VI is powered up, without causing any damage to the card or the recorder. The Nagra VI records using Broadcast Wave File (BWF) format and is iXML compatible for the metadata making the files compatible with all modern post-production equipment.
NAGRA VI使用内置的120G硬盘。可以选择一些音轨同时存在CF卡上。NAGRA VI可以在1GB硬盘上存储15分钟的8轨音频，48KHz/24bit。CF卡是热插拔设计。可以在工作的时候插拔，不会导致录音机或卡的任何损坏。NAGRA VI录音使用BWF格式，iXML兼容metadata，与现代的任何播出设备兼容。
The Nagra VI is equipped with a sunlight-readable 3.5″ color TFT display with a resolution of 320 x 200 pixels. This specially designed high luminosity display is used to visually indicate not only the status of the Nagra VI but also the bargraph modulometers, take number, time code and the current operating modes of the machine. It is also used to display the menu system for all the machine parameters. When the display is in the menu mode, the audio levels can still be monitored using the LEDs on the front panel. A choice of user selectable screens can be displayed in the Test, Record and Play positions, including the modulometers ONLY, according to the operators desire. The colors and intensity of the screen can be adjusted by the user.
The Nagra VI has the possibility to mix the audio from the 6 analog inputs to a stereo mix on channels 7 + 8 The output of the mixer can be set to both mono or stereo. Each microphone input level and L / R pan can be controlled using the arrow keys giving versatile mixing facilities. The mix channels can be recorded to the CF card in the copy process, as well as being recorded to the internal drive in the normal manner. If channels 7 + 8 are not being used for the mix, then all 8 inputs can be used for recording (using both digital inputs). Mixing to the audio outputs during playback is also possible.
The Nagra VI is equipped with a powerful routine to verify the read and write speed permitted by the different media (internal drive, CF card and USB drives). Certain “clone” or “fake” CF cards are available on the internet and the NAGRA VI allows the user not only to verify the digital id of the CF cards but also to check the read/write capacity of these media. Poor quality, low cost cards can cause severe problems when trying to write high bit rate linear PCM audio in real time.
NAGRA VI可以测试不同媒体允许的写入速度，包括内置硬盘、CF卡和USB硬盘。低质量的CF卡充斥网络。NAGRA VI不止可以读CF卡标签（可能是假标签），还可以实际测试CF卡的读写能力。低质量的CF卡可能在进行高码率录音的时候产生严重问题。
The Nagra VI is equipped with two high speed USB 2.0 ports. One is designed to connect the Nagra VI to a computer for file transfer. The second is a “host” connection and is used for connection of an external drive (USB key, external hard disk, DVD-RAM burner) or an external device such as a USB keyboard.
The Nagra VI can store up to six internal templates containing all the user selectable settings and parameters of the recorder. These can be individually named and recalled at any time to rapidly change the settings of the machine depending on the desired operating situation. Templates may also be stored on an external media (6 per media) as text files and can be edited using a simple text editor such as Notepad. This system allows the creation and use of partial templates if desired.
The internal time code system and all the internal digital electronics of the Nagra VI are clocked by a crystal which is a “Stratum III” TCXO which has been artificially aged in an oven to maintain stability. This crystal gives a guaranteed overall stability better than ±4.6ppm over a period of 15 years throughout a temperature range from -20°C to +70°C. The drift due to temperature changes is less than 0.28ppm. This is the most accurate crystal ever used in an NAGRA recorder. The Nagra VI will handle all the standard SMPTE / EBU frame rates as well as the 23.976fps rate for the HD format. All the frame rates can be pulled “up/down” for the NTSC markets. The internal chase synchronizer allows the recorder to follow / chase any external time code signal for post production synchronization purposes.
NAGRA VI通过内置的Stratum III TCXO晶振生成内置的时间码系统。这东西超级稳定。这个晶振可以在15年内，在温度范围-20°C to +70°C，提供优于±4.6ppm 的精度。对温度的敏感度优于0.28ppm。这是NAGRA录音机从未使用过的高精度晶振。NAGRA VI可以处理所有标准的SMPTE/EBU帧速率和HD格式的23.976fps速率。所有的帧速可以偏移至NTSC市场要求。内置的相位同步器允许这台录音机跟随或锁定任何外部的时间码信号来适应后期制作同步。
|Data storage medium||120 GB Internal hard disk|
|Removable media||Compact Flash type I / II (Hot Swappable)|
|Disk format||FAT 32|
|Recording Method||Linear digital PCM|
|File type||16 / 24 bit Broadcast Wave File BWF (WAV) with iXML, AES 31 compatible|
|A/D & D/A conversion||24 Bit Sigma Delta|
|Sampling Rate||44.1, 48 kHz, 88.2, 96, 176.4 and 192 kHz (with 0.1% pull up / down)|
|Recording capacity||15 mins of 8 track 24 bit 48 kHz per GB of disk / memory|
|Mono / polyphonic||Selectable|
|Pre-recording buffer||Up to 20 seconds @ 48 kHz 24-bit on 8 tracks Max 10 seconds @ 96 kHz 24-bit 48kHz 24-bit on 8 tracks|
|Display||3.5 inch colour TFT LCD|
|Level meters||On colour display AND by LED for microphone inputs|
|Digital inputs||2 x XLR AES-3 shared with analogue inputs 5+6|
|Analogue inputs||4 x symmetrical XLR Microphone (Dynamic, +48V Phantom) / line|
|Microphone input sensitivity||2.8, 10 and 30 mV/Pa selectable|
|Limiters||Selectable on microphone inputs, individual or in pairs. Active at -8dBFS, max +36dB for -2 dBFS|
|Line input sensitivity||Adjustable from -6 dBm up to +24 dBm for 0 dBFS recording|
|THD at 1 kHz||<0.1% Mic, <0.01% line (measured on AES out)|
|Frequency response||Mic, 10Hz – 48 kHz ± 0.5 dB, Line ±0.2 dB (measured on AES out)|
|Input noise with condenser mic||0.88 µV (-119 dBm)|
|Input noise with dynamic mic||4 dB (measured ASA “A” loaded 200Ω|
|Signal-to-noise ratio||>114 dB|
|Input level adjustment range||50 dB Mic and from -6 to +24 dB Line|
|Input filters||LFA (with vortex filtering)|
|Slate microphone||Electret behind the front panel|
|Analogue line output||2 x XLR 4.4V max (+15 dBm)|
|Digital output||XLR AES-3 (24 bit or 16 bit dithered)|
|Headphones||2 x Stereo 6.3mm (¼”) Jack 50 Ω|
|USB Host||USB 2.0 connector type “A”|
|USB Device||USB 2.0 connector type “B”|
|Time code IN/OUT||5 pin LEMO (SMPTE / EBU)|
|Word Clock||9-pole “D” type connector (In / Out)|
|Dither||Menu selectable 24/16bits on Inputs and/or Outputs|
|Dimensions||310 x 74 x 285mm (W x H x D) (Incl. battery box)|
|Weight||3.8 kg (8.3 lbs) (with battery pack)|
|Power supply||Lithium-Ion, or external 9 – 16V (XLR 4 pole)|
|Power Consumption||Approximately 10W|
|Charge time||3 hours (with supplied Lithium-Ion pack)|
|Ext. power out||2 Hirose 12V (max 1A)|
|Operating temp.||From -20°C to +60°C (without internal hard disk) From 0°C to +50°C (internal hard disk installed)|
|Relative humidity||From 10% to 99% (non condensing)|
|7032110000||NVI-LIB1||Replacement 4.6Ah Lithium-ion rechargable battery pack|
|7032115000||NVI-LIB2||13.8Ah Lithium-ion rechargable battery pack|
|2032250000||NVI-PSU||Mains power supply for NAGRA VI|
|2099188000||NVI-CC1||Carrying case for NAGRA VI with shoulder strap|
|7032120000||NVI-SS||Shoulder strap for NAGRA VI (replacement)|
|7032105000||USB User Manual|
|0132050028||Replacement “leg” to incline NAGRA VI|
|7032125000||NVI-USB||Optional second USB port|
|7032135000||SATA drive option (Without disk)|
|2097245000||128GB Solid State Drive|
|2032265000||Hirose power cable Male-Male 50cm for EMP/ NAGRA VI|
|2032266000||Hirose power cable Male-Male 1m for EMP / NAGRA VI|