Tuesday, December 20, 2011

TASCAM DP-004 Digital 4-track Recorder

!±8± TASCAM DP-004 Digital 4-track Recorder

Brand : Tascam | Rate : | Price : $147.95
Post Date : Dec 21, 2011 06:27:06 | Usually ships in 24 hours


Tascam DP004 Digital Pocketstudio Recorder based on 30 years of cassette Portastudios! Though based on Tascam's long line of cassette. Pocketstudio brings users into the new-age of digital recording with four CD-quality tracks and features like Undo and Repeat that wouldn't be possible on your past generation, cassette portastudios. Much like those easy-to-use Portastudios, the Pocketstudio sports a similar row of knobs to set levels and pan instead of confusing you with menu screens.The Tascam DP004 is able to record two sources at the same time onto it's removable SD memory. A stereo condenser microphone has been designed into the unit to make it simple and ready to record in any situation. Record concerts, rehearsals and sudden songwriting inspirations when they occur. Dual rear panel 1/4 inch jacks provide connection to dynamic mics or other stereo or mono sources. Inputs are switchable to a guitar level signal for easy recording. Tascam DP004 Features Two 1/4 mic/line inputs Switchable guitar input Headphone/Line output USB 2 connector for connecting to your home computer Records to SD Card media Autopunch, repeat and record undo Dedicated stereo mixdown track Powered through AA Batteries or optional PS P520 power adapter The DP004 allows you to build up your arrangement until you've filled up all four tracks. The Bounce feature allows you to consolidate tracks and make room for more overdub layers. Also available is an autopunch feature for fixing problems, track editing and an undo function. Mixing is also built into the Digital Pocketstudio. Once you set levels and pan, record your mix onto a dedicated stereo master track. You're able to transfer your tracks and mixes to a computer over USB 2 for CD burning and sharing online. Despite its go-anywhere

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Sunday, December 11, 2011

My Lil' Reminder Infomercial

What they're selling: A digital recorder, which is like an MP3 player except it records instead of playing back and can only hold one 30-second track so you can leave yourself reminders in audio form. "Shit, where did I put my digital recorder? Fuck!" The hyperbole: The scene opens with a senile grandma wandering around a parking lot. Weighing her options, which are searching for her car using a systematic procedure or talking to herself out loud before grabbing her head in frustration, she chooses the latter. Sadly, if you're constantly forgetting things, lack the problem-solving skills to compensate, and cannot manage enough insight into your own uselessness to carry around a pen and paper with you at all times, then you may have advanced Alzheimer's Disease. You have no business wandering around a parking lot unescorted, let alone getting behind the wheel of a car or operating a digital recording device. The reality: We must admit, though, that the bit with the guy using it for storing driving directions was pretty convincing. If we ever sense that our ambient levels of smiling doucheness are running low, we'll be sure to place an order. Of course, that's assuming the thing works properly. According to people who actually used the product: "Piece of Junk" "... you have to practically stick the thing inside your ear to hear it." "On Friday I told my wife that she urgently had to get her medication from the pharmacy ... She recorded the message on her recorder (I saw her ...

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Friday, December 9, 2011

Digital Music File Formats

!±8± Digital Music File Formats

An uncompressed digital music file (such as that on a music CD) uses 10MB or more per minute (at least 30MB for a 3 minute song).

These files have to be compressed to the more usual levels of 3-5MB per song. Compression rearranges the sequence of numbers, sometimes throwing away less significant information, in order to reduce the file size. The way the compression is achieved leads to the many different audio file formats available. Below is a list of the popular formats used by MP3 players.

MP3 (MPEG Layer 3)

MP3 is a perceptual audio coding algorithm, developed by the MPEG group. Although its a lossy compression, the digital audio sounds exactly as, or very close to, the original sound. The algorithm attempts to adapt the compression to the characteristics of the human perception of sound. This compression algorithm can handle both constant and variable bit rate compressions.

For good quality music, a bit rate of at least 192Kbps is recommended - this is near CD quality. 256Kbps per second is better. There is very little quality difference between 256Kbps and 320Kbps, but the later will have a larger file size. MP3 files have no Digital Rights Management (DRM) technology built in - meaning they are freely portable. That's not to say its legal to move music files from one device to another.

AAC (Advanced Audio Coding)

A newer, lossy audio compression format developed by the same MPEG group. AAC is more efficient than the popular MP3 format, and requires less processing power to decode. Its also not backward compatible with MP3. AAC-compressed audio at 96 Kbps generally exceeds the quality of MP3-compressed audio at 128 Kbps.

AAC supports DRM, but you can have both protected or unprotected formats. The unprotected format is freely portable, while the protected format is locked by the DRM used. Apple uses the AAC format for its iTunes and in QuickTime. Audio compressed at 128Kbps using AAC sounds very close to the original sound, which means a smaller file size for the same audio quality compared to the MP3 format. The file will be about 75% of the size an MP3 compression would produce.

WMA (Windows Media Audio)

WMA is another lossy compression format, developed and owned by Microsoft, and used in Windows Media Player for DRM management. This compression is more efficient than MP3, and comparable to AAC in terms of efficiency and file size reductions.

WMA supports DRM, so can have both protected and unprotected audio files. Most devices and players support the unprotected WMA files - Apple iTunes software can convert them to AAC files.

Ogg Vorbis

Unlike the other formats, Ogg Vorbis is a completely open-source, patent-free, professional audio encoding and streaming format. There are no licensing fees for using this codec. If you are an artist that's goods news. You won't have to pay any fees if you distribute your songs, which you would if you use, say, MP3.

It is yet another lossy compression, but much better than MP3. An Ogg Vorbis audio file encoded at 110Kbps gives a smaller size and sounds better than an MP3 file encoded at 128Kbps. 160Kbps gives very-near-CD-quality audio encoding. Although it's open-source, this codec compares very favourably to WMA, AAC, WMA Pro etc (see Wikipedia for more on this).

This format is rising in popularity due to its open-source nature and freedom from licensing issues.

MIDI(Musical Instrument Digital Interface)

MIDI is one of the old formats, but still very much in use today. Its not really a compression algorithm, but a synthesized music format. MIDI files consist of lists of commands which tell a synthesizer when to start/stop playing a specific note of a specific instrument, and may include the volume and modulation of the note. With MIDI you can play a number of instruments at once, or just play one instrument at a time.

These files are generally tiny compared to normal audio files such as MP3, WMA, AAC. Because this is synthesized music, its quality greatly depends on the quality of the synthesizer on your PC's sound card or the quality of the synthesized instruments in your software. One application for MIDI files is as mobile phone ring tones.

RealAudio (RM/RAM)

This format from RealNetworks was at the fore-front of internet audio formats for many years. This format is usually streamed, rather than downloaded. It can be played using the RealPlayer or RealOne software. A good number of internet radio stations still use this format for their broadcasts.

The audio can be streamed at different bit rates to satisfy bandwidth constraints. If you are on a dial-up internet connection, the music quality you get is lower than if you are on broadband.

ATRAC(Adaptive Transform Acoustic Coder)

The ATRAC compression algorithm is owned by Sony, and was first used in the MiniDisc in 1992. The ATRAC family of lossy algorithms has three members: ATRAC, ATRAC3, and ATRAC3plus. ATRAC, the oldest of the three, can compress CD music to approximately 20% of the original size. ATRAC3 improves on this by a factor of two, compressing a music stream to about 10% of the original.

The youngest member, ATRAC3plus, can compress a music CD to about 5% of the original. In simple terms, ATRAC3plus can allow you to save over 350 music tracks on a 700MB CD. The ATRAC3plus is the default on Sony MP3 players, although they can also play other file formats.

Sony also has a lossless algorithm, imaginatively called the ATRAC Advanced Lossless algorithm. Perfomance-wise, ATRAC3 and ATRAC3plus are comparable to AAC and WMA. Being a proprietary algorithm, its not as widely supported as say MP3.


Digital Music File Formats

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Saturday, December 3, 2011

Security Digital Video Recorders Revolutionize Video Surveillance

!±8± Security Digital Video Recorders Revolutionize Video Surveillance

The security digital video recorder, security DVR and the latest computer software has made the PC an integral part of surveillance. In order to have a successful installation of a digital video surveillance system, you should educate yourself fully regarding the technology and the marketplace. Above all, use only qualified and experienced technical consultants to design and implement your security system.

The videocassette recorder (VCR) was the main tool used for video surveillance before the coming of digital video. There were some inherent problems with videocassette technology. First, was the limited amount of time that a videocassette tape could hold. Time lapse recording was used as a work around to this limitation. Regular live motion video is recorded at thirty frames per second. Time lapse reduces this to only one frame per second or even less. With time lapse recording, the tape needs changing every 4 to 5 days. Somebody has to remember to change the tape.

Parts of an incident will be missing from a video tape when recorded using time lapse recording. The physical condition of the video tape will deteriorate as it is used over and over again. Old tapes were likely to break or jam a machine. You can not manage operations remotely when using videocassettes. Somebody has to travel to the actual camera location and replace the video tape.

Video cassette recorders could merge the data from multiple cameras into one recording device using a multiplexer. A multiplexer has multiple inputs and a single output. Each camera view is shown on a small portion of the screen.

There were technical limitations with DVRs when they were first introduced that made them difficult to use for surveillance operations. With the coming of PC based digital video recording technology, the DVR has replaced videocassette as the preferred technology. There is no limit to the amount of data you can record. A PC based system uses special hardware and software to remotely administer your video surveillance. With the DVR time lapse recording is eliminated. You will capture the smallest details of every incident. You can use multiple cameras for various angles to be sure no area is unprotected.

It is clear that a PC based system is far superior to its videocassette predecessor. Tape jamming, signal loss and degaussing is eliminated. Recording to a hard drive means that unlimited amounts of video can be stored indefinitely. Hard drives never suffer any signal loss and no deterioration of quality over repeated uses. Automated operations of the system will ensure that no one will ever forget to push the record button. You will eliminate the hassle and cost of buying, replacing and storing cassette tapes.

There are many companies in the DVR surveillance marketplace. You should be very careful when selecting a company to work with. Take the time to fully assess your unique security needs. Discuss your security needs with several companies before selecting the most qualified and experienced.

The security digital video recorder, security DVR and the latest cutting edge video surveillance systems are a big improvement from video cassettes. You will be glad that you switched to a PC based DVR system. Make sure to use only experienced and qualified technicians when you design and implement your security surveillance systems.


Security Digital Video Recorders Revolutionize Video Surveillance

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