User manual YAMAHA 02R

[. . . ] DIGITAL RECORDING CONSOLE E FCC INFORMATION (U. S. A. ) 1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by Yamaha may void your authority, granted by the FCC, to use the product. [. . . ] These values are obtained when the sampling frequency is 32 kHz Threshold determines the level of input signal required to trigger the expander. Signals above the threshold pass through unaffected. Signals at and below the threshold level are attenuated by the amount specified using the Ratio parameter. The trigger signal is determined using the KEY IN parameter. Ratio controls the amount of expansion - the change in output signal level relative to change in input signal level. With a 1:2 ratio, for example, a 5 dB change in input level (below the threshold) results in a 10 dB change in output level. For a 1:5 ratio, a 2 dB change in input level (below the threshold) results in a 10 dB change in output level. Attack controls how soon the signal is expanded once the expander has been triggered. With a fast attack time, the signal is expanded almost immediately. With a slow attack time, the initial transient of a sound passes through unaffected. Out Gain sets the expander's output signal level. Knee sets the transition of the signal at the threshold. With a hard knee, the transition between unexpanded and expanded signal is immediate. With the softest knee, knee5, the transition starts before the signal reaches the threshold and gradually ends above the threshold. Release determines how soon the expander returns to its normal gain once the trigger signal level drops below the threshold. Digital Recording Console 02R User's Guide 66 dB Dynamics Compander Width +20 +10 0 -10 Output Level -20 -30 -40 -50 -60 -70 dB -70 -60 -50 -40 -30 -20 -10 Input Level 0 +10 +20 Threshold A compander is a compressor-expander - a combination of signal compression and expansion. The compander attenuates the input signal above the threshold as well as the level below the width. For very dynamic material, this program allows you to retain the dynamic range without having to be concerned with excessive output signal levels and clipping. CompanderH (CPH) and CompanderS (CPS) parameters: Parameter Threshold (dB) Ratio Attack (ms) Outgain (dB) Width (dB) Release (ms) *1 *2 *3 ­54 to 0 Value (55 points) 1. 0, 1. 1, 1. 3, 1. 5, 1. 7, 2. 0, 2. 5, 3. 0, 3. 5, 4. 0, 5. 0, 6. 0, 8. 0, 10, 20 (15 points) 0 to 120 ­18 to 0 1 to 90 6 ms to 46. 0 sec 5 ms to 42. 3 sec 8 ms to 63. 4 sec *3 *1, *2, (121 points) (36 points) (90 points) (160 points) These values are obtained when the sampling frequency is 48kHz. These values are obtained when the sampling frequency is 44. 1 kHz. These values are obtained when the sampling frequency is 32 kHz Threshold determines the level of input signal required to trigger the compander. Signals above the threshold pass through unaffected. Signals at and below the threshold level are attenuated by the amount specified using the Ratio parameter. The trigger signal is determined using the KEY IN parameter. [. . . ] When multiple digital devices are connected together, it is vital that each device knows where a digital word starts and stops. Otherwise dropout or distortion may result. Although most digital interconnect protocols are self-clocking, it is more reliable to use a dedicated line for your wordclock signal. This is especially important in a multitrack environment where up to eight channels of digital data may be multiplexed on one cable. Digital Recording Console 02R User's Guide Glossary 231 References and Further Reading · · · · · · Introducing Digital Audio, Ian R Sinclair, second edition, PC Publishing, 1992. [. . . ]