Inter-M CD-6208 - Manual (Page 6)

MULTI SOURCE PLAYER
4 CD-6208
Additional Descriptions Additional Descriptions
- MP3 (MPEG AUDIO LAYER-3)
MP3 is one of music file formats that can contain music with stereo sound quality as good as audio which is a
type of MPEG as audio, video compression standards. Compression rate is 1Mb by 1 and thus about 3~ 5
minutes are sufficient if recording songs of 3~ 5 min or so. Differently from audio a music file made of MP3 can
contain over 130 songs for popular songs or folk songs and playing also about 10 hours. MP3 clears frequency
range for a human being not to discernable and advantage to compact it to 1/12 or so while maintaining
music as sound quality equivalent to CD level.
Example, deriving a song in a music CD while maintaining music as sound quality equivalent to CD becomes
capacity of 50MB or so but if compressing and converting it to a MP3, size of the MP3 reduces to 4~5MB.
- WMA (WINDOWS MEDIA AUDIO)
WMA is a multimedia compression method developed by Microsoft Corporation and is technology compress
only music from ‘Window Media Technologies’, and provides same sound quality as format MP3 up to
128Kbps, which has lower 64Kbps format than MP3.
In other words, it has a file size of the half of the MP3 and provides same sound quality as MP3.
- DIGITAL OUTPUT AND STANDARDS
Audio signal of a CD records digitalized signal. Usually digital audio signals are converted to analog signals
with a Digital Analog Converter (DAC) within a player. On the other hand, digital signal is replaced with
optical signal by coaxial cables, semiconductor laser or light emitting diode (LED), etc and can be connected to
the other devices with optical fiber cables. The unit receiving optical signal converts optical signals to electrical
signals again for various processes. Transmitting digital data as they are is less affected by electrical noise than
electrical signals, and thus less data error occurs.
The digital interface used in this product is a form of S/PDIF (Sony/Philips Digital Interface) and complies with
standards called as IEC958.
- RS-232C SERIAL INTERFACE
AMX or CRESTRON remote control system can be used with this RS-232C terminal.
The maximum cable length should be below 15m.
1. RS-232C Terminal
2. Remote control function
Play/Pause, Stop, Skip down/up, Search Down/up, etc can be controlled by a remote controller.
3. Downloading of the control protocol
You can download the protocol at the home page (www.inter-m.com).
Pin 1 2 3 4 5 6-9
Purpose X Receive Transmit X Ground X