User manual DBX 376

[. . . ] ® 376 Vacuum Tube Channel Strip w/Digital Out User Manual IMPORTANT SAFETY INSTRUCTIONS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING FOR YOUR PROTECTION PLEASE READ THE FOLLOWING: KEEP THESE INSTRUCTIONS HEED ALL WARNINGS FOLLOW ALL INSTRUCTIONS CLEAN ONLY WITH A DAMP CLOTH. A T T E N T I O N : RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR W A R N I N G : TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE The symbols shown above are internationally accepted symbols that warn of potential hazards with electrical products. The lightning flash with arrowpoint in an equilateral triangle means that there are dangerous voltages present within the unit. The exclamation point in an equilateral triangle indicates that it is necessary for the user to refer to the owner's manual. These symbols warn that there are no user serviceable parts inside the unit. [. . . ] Use the Parametric EQ LOW, MID, MID-FREQUENCY and HIGH controls to achieve the desired EQ settings of the 376. With signal passing through the unit, make the desired settings to the THRESHOLD, RATIO, OVEREASY and SLOW controls of the Compressor section of the 376. If you are using the 376 for a Vocal Application, make the desired settings to the FREQUENCY and AMOUNT c ontrols of the De-Esser section of the 376. 2. 3 Direct Connection to a Recorder 1). Make microphone connections, being careful to keep the DRIVE control in the minimum (+30 dB) position. Connect the 376's Line outputs directly to the audio inputs of your recorder. ® 376 User Manual 9 Section 2 Analog Applications 376 3). Enable the record function of the specific track of the recorder and open the specific tape track return in the console which corresponds to the track to which the 376 is connected. As you increase the setting of the DRIVE control, you should begin to hear the input of the 376 running through the recorder and returning to your console as a tape return. Use the Parametric EQ LOW, MID, MID-FREQUENCY and HIGH controls to achieve the desired EQ settings of the 376. With signal passing through the unit, make the desired settings to the THRESHOLD, RATIO, OVEREASY and SLOW controls of the Compressor section of the 376. If you are using the 376 for a Vocal Application, make the desired settings to the FREQUENCY and AMOUNT c ontrols of the De-Esser section of the 376. ® 10 376 User Manual 376 Section 3 DIGITAL APPLICATIONS APPLICATIONS DIGITAL ® Section 3 Digital Applications 376 3. 1 Digital Output Front Functions of the 376 Dither Switch This switch is used to select the dither type algorithms including: TPDF, SNR2 , or None. Dither is random noise that is added to the audio signal which effectively eliminates the harmonic distortion created by truncation. See the"Truncation" graph in section D. 2 of the Appendix. The LED will be lit RED for the SNR2 or GREEN for the TPDF dither algorithm. When the LED is off, dithering is not in use. Shape Switch This switch selects the Shape 1, or Shape 2 psycho-acoustic noise-shaping curve. Shape 1 utilizes a mild psycho-acoustic curve, while the curve used in Shape 2 tends to be more aggressive. Please see the "Noise Shaping" graph in section D. 1 of the appendix. The LED will be lit GREEN for Shape 1 and RED for Shape 2. When the LED is off, the noise-shaping algorithm is not in use. Sample Rate Switch This switch selects the digital output sample rate of either: 44. 1, 48, 88. 2, or 96 kHz. The LED will not be lit for 44. 1 kHz, GREEN for 48 kHz, RED for 88. 2 kHz and YELLOW for 96 kHz. Word Length Switch Selects output wordlength of 16, 20, or 24 bits output resolution. The LED will not be lit for 16 bit, GREEN for 20 bit, and RED for 24 bit. Output Format Selects either the AES/EBU or S/PDIF digital output format. The LED will be green for AES/EBU and red for S/PDIF. 3. 2 Digital Output Rear Panel Connections ® 12 376 User Manual 376 AES/EBU Digital Connector Digital Applications Section 3 Th e 3 7 6 p r o v id e s A E S/E B U d ig ita l o u tp u t fo r m a ttin g th r o u g h th e X L R c o n n e c to r . B e s u r e to u s e s h o r t le n g th s o f 1 1 0 d ig ita l c a b le s r a th e r th a n s ta n d a r d X L R to X L R c a b le s . [. . . ] 3b) at the A/D converter, a disproportionate amount of high-frequency signal information is lost compared with the low-frequency information. The low and high-frequency components of the signal are separated in Fig. As you can see, the low frequency signal simply gets distorted but maintains most of its signal characteristics, while sections of the high-frequency signal are completely lost!With dbx Type IVTM, its mapping preserves high-frequency signal information, as illustrated in Fig. [. . . ]