For several years, newer CD players have expanded the length of continuous playback time without interruption by adding the ability to play compressed digital audio files off CD data discs. One CD data disc could provide as much as 20 hours when playing back low bit rate MP3 files. In addition to reading all those files from CD, it also has the unmatched ability to read any of the above from any data DVD. This not only expands the hour playback time to almost six days continuously , but also allows those users who demand uncompressed audio quality the ability to play back full Not only can the DN-C decode a host of compressed and uncompressed digital audio files from CD or DVD data discs, but it now gives the end-user the unique ability to stream any of those files from a server or computer, as long as it is accessible via the network. Now, any corporate environment that records and stores their meetings on a network HDD or computer can simply navigate to that folder location from the front panel of the unit or by using the on-board web browser, select a specific file, and play it into their system.

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Update your browser to view this website correctly. Update my browser now. On a whim I accessed the Denon professional website to see what the company offered as a replacement for its discontinued, cartridge-style CD players.

I discovered a […]. Looking for replacements for our old, rebuilt-many-times, Audiometric CD10 CD players turned up some good candidates. This player was introduced early in and was displayed at NAB, although I did not notice it at the time. After I read the description, I decided this was no ordinary CD player: It is network addressable and was worth a closer look. For a 1RU CD player, the front and back panels are well designed and the functions fairly intuitive.

This CD player is slot-loading, not cartridge-loading. Only time will tell how this will hold up under the daily duress of a broadcast facility, but it cannot be any worse than the cartridge trays. One comforting feature is that the eject button is locked while a CD plays. Along with your normal transport controls, a multi-function jog wheel controls track selection, network media selection, preset selections and pitch control.

The latter adds depth to the menu scheme without confusing the user. In my tests I set up a UNC path to a file server folder. The back panel has all the amenities of a CD player and provides interconnects necessary for a broadcast facility.

As expected from a professional machine, the analog outputs are balanced, XLR type connections. If that was not enough, unbalanced outputs are available, one with variable output level control via the internal Web interface. For interfacing to external equipment, the parallel DB type connection accesses transport controls and tally and the RS DB-9 connection is a full-function serial port.

An EOM end of message tally is also provided. With automation systems playing music and so many other networked devices, I wondered at this device. My colleagues and I produced a list of uses instantly upon setting up this unit. For morning shows, have one machine assigned to access stored interviews and archived bits for near instant playback. While many stations are becoming more network-intensive, a production file server can be addressed.

One suggestion was to backup the automation system with currents. Another concept is a backup source at the transmitter site. If an off-site server is deployed and the main studio is inaccessible, you can stream through the CD player over the network. We intend to try this soon. There are alternatives to this method, but how many laptop computers provide AES3 out to feed a digital exciter? The nontraditional addition is the LAN jack. I recommend assigning the IP address statically to these machines, as it is difficult to keep up with a device with a Web interface and potentially changing IP address.

The most notable feature of the DN-C is its networking capability. Using the internal Web interface, after setting up the IP address, you can fully control the CD player and playback files stored on a server or PC. It also reads the ID3 standard to provide artist and title content of MP3s.

As expected, you can upload a track or a whole CD to a network location from the CD player. Between CDs and network access, the flexibility is amazing. Many other features are found on this machine that take a back seat to the new networking functions.

Many CD players today do not have pitch control, but there are still uses for this feature. Many presets can be set on how the player responds when a disc is first inserted to what the player does when a song ends. This latter feature is the Finish Mode. Upon completion of a song, you can set whether the machine stops, continues to play, plays next or recues. The capability to recue on end is quite useful. Presets are set via the front panel controls or the internal Web interface.

Bench testing revealed typical specs for a professional CD player. The most impressive is the start of playback from a CD or a file over the network. This unit is as close to instant start as one can get. Press play and the machine plays. Even files played over the network show minimal delay in playback. Network response is dependent on network traffic. We keep our audio separate from day-to-day use to off-set latency.

The Auto Cue function assists in quick play response. The cue level is user selectable between off, dB, dB, and dB. I chose for my tests and did not experience any up-cutting.

Another example of a user selectable item is the EOM. This defaults at 10 seconds and can be set for 15, 20, 30 or 60 seconds. For morning shows or contests that require the playback of a snippet of a song, there is a Skip Back function where the amount of time the player will instantly play back when engaged is selected. As with any new product there is room for improvement. Unless you map to the root directory of a server or computer there is limited access to network resources.

One machine cannot access multiple locations or machines without being configured for such access each time using the Web interface. This limitation forces you to assign one machine to a morning show that may not store on the same file server as the rest of production. In addition the network location must be chosen using the Web interface, not the front panel.

On my test unit, the most annoying item is the time remaining setting. I was unable to set this and make it stay. It is also not a default setting. Recently, Denon provided a firmware upgrade to the machine, which is very easy to use. The company provides a CD; you pop it into the machine, and accept the update. Again, the default for the timer was not remaining time, but a press of a couple of buttons and the setting is changed and stays even if you need to power down the machine.

With this fix out of the way, I still would like to be able to name uploaded tracks from a CD through the player. Though inconvenient, you can edit the name on the file server later.

Denon P W E www. The response on playback is tremendous. It took less than a half-hour to have the unit up and running on the network and most configurations were done without using the manual. Intuitive design and user functionality make this CD player a useful tool in any broadcast facility.

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Denon Professional DN-C640

For use in applications such as radio, TV, music studio, and background or foreground audio playback, this versatile design has an embedded web server offering a graphical interface to networked computers. It is also capable of play-back from networked resources, and uploading of audio material. In addition to network control it has wireless infra red and wired contact-closure and RSC remote control. Audio interfacing is comprehensive, including balanced analogue and digital outputs. It uploads from local media to such resources using the same protocol.


DENON DN-C640 CD PLAYER Networked, Ethernet, AES/EBU, balanced and unbalanced, 1U rackmount

Review By Clarke Robinson Click here to e-mail reviewer. A s much as we all hoped or feared that the compact disc would be replaced by one of the new high-resolution formats, but it looks as if America 's music consumers have spoken, and they are choosing digital downloads in ever-increasing numbers. The CD may be on its way out, but it is still the most popular medium for music distribution for the time being almost 6x that of digital download sales in , so you're still going to need one for the foreseeable future. However, a new question is emerging among audiophiles faced with growing collections of music files on their hard drives: how do I play all that stuff on my "real" audio system? Sound interesting? I thought so, and Denon Professional's PR agents were nice enough to respond to my request for a review sample. The DN-C was intended for use in radio stations, dance clubs, shopping malls playing background music, etc


Field Report: Denon DN-C640




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