User manual YAMAHA CX-630

[. . . ] 3 Locate this unit away from other electrical appliances, motors, or transformers to avoid humming sounds. 4 Do not expose this unit to sudden temperature changes from cold to hot, and do not locate this unit in a environment with high humidity (i. e. a room with a humidifier) to prevent condensation inside this unit, which may cause an electrical shock, fire, damage to this unit, and/or personal injury. 5 Avoid installing this unit where foreign object may fall onto this unit and/or this unit may be exposed to liquid dripping or splashing. [. . . ] When the unit is unable to detect the sampling frequency "Unknown" shows in the front panel display. When the unit is unable to detect the bit rate "Unknown" shows in the front panel display. flg: The display shows the flag - data encoded in a DTS or Dolby Digital signal that causes this unit to automatically switch to the appropriate decoder for playback. Front panel Remote control English 27 DIGITAL SOUND FIELD PROCESSING (DSP) Understanding sound fields A sound field is defined as the "characteristic sound reflections of a particular space". In concert halls and other music venues, we hear early reflections and reverberations as well as the direct sound produced by the artist(s). The variations in the early reflections and other reverberations among the different music venues is what gives each venue its special and recognizable sound quality. YAMAHA sent teams of sound engineers all around the world to measure the sound reflections of famous concert halls and music venues, and collect detailed sound field information such as the direction, strength, range, and delay time of those reflections. Then we stored this enormous amount of data in the ROM chips of this unit. Recreating a sound field Recreating the sound field of a concert hall or an opera house requires localizing the virtual sound sources in your listening room. The traditional stereo system that uses only two speakers is not capable of recreating a realistic sound field. YAMAHA's DSP requires four effect speakers to recreate sound fields based on the measured sound field data. The processor controls the strength and delay time of the signals output from the four effect speakers to localize the virtual sound sources and fully encompass the listener. HiFi DSP programs The following list gives you a brief description of the sound fields produced by each of the sound field programs. Keep in mind that most of these are precise digital recreations of actual acoustic environments. No. When a DTS or Dolby Digital signal is detected, the CINEMA DSP sound field processor automatically chooses the most suitable sound field program for that signal. L SURROUND SOUND FIELD PRESENCE SOUND FIELD BASIC OPERATION DIALOG EFFECT MUSIC R SURROUND SOUND FIELD In addition to the DSP, this unit is equipped with a variety of precise decoders; Dolby Pro Logic decoder for Dolby Surround sources, Dolby Pro Logic II decoder for Dolby Surround and 2-channel sources, Dolby Digital/DTS decoder for multi-channel sources and Dolby Digital + Matrix 6. 1 or DTS + Matrix 6. 1 decoder for adding a surround back channel (the surround back channel is outputted from virtual surround back speaker). You can select CINEMA DSP programs to optimize these decoders and the DSP sound patterns depending on the input source. CINEMA DSP Programs The following list gives you a brief description of the sound fields produced by each of the sound field programs. Keep in mind that most of these are precise digital recreations of actual acoustic environments. Select the sound field program that you feel sounds best regardless of the name and description given for it below. For audio-video sources: No. 4 Program ENTERTAINMENT/ Game MUSIC VIDEO Features This program adds a deep and spatial feeling to video game sounds. 5 This program lends an enthusiastic atmosphere to the sound, giving you the feeling you are at an actual jazz or rock concert. This program is provided for reproducing monaural video sources (such as old movies). The program produces the optimum reverberation to create sound depth using only the presence sound field. Though the presence sound field is relatively narrow, the surround sound field employs the sound environment of a large concert hall. This effect enhances the experience of watching various TV programs such as news, variety shows, music programs or sports programs. 6 TV THEATER/ Mono Movie English TV THEATER/Variety/ Sports 29 CINEMA DSP For movie programs No. 7 Program MOVIE THEATER 1 Spectacle Features This program creates the extremely wide sound field of a 70-mm movie theater. It precisely reproduces the source sound in detail, making both the video and the sound field incredibly real. [. . . ] 105/135/165 W · Frequency Response CD, etc. to Front L/R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Hz to 100 kHz, ­3 dB · Total Harmonic Distortion 1 kHz, 50 W, 6 !, Front L/R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 06% or less · Signal to Noise Ratio (IHF-A Network) CD (250 mV, shorted) to Front L/R, Effect Off . . . . [. . . ]