Bethesda, MD (December 16, 2010)–Lipinski Sound has released its L-629 compressor, built for use in 500 Series rack units. Features include a tape emulation system, a pre-compression system and a low-frequency distortion elimination system.
In a typical audio signal, low-frequency components have greater level than high-frequency components. Standard compression mode treats all frequencies equally, which makes the sound very “sharp.” By turning Tape Simulation on, compression for high-frequency components is increased by 3 dB.
Proper signal level should be applied to the input of the main compressing unit. Users can either set it at the source of the signal (FIXED IN) or let the device control it automatically (AUTO IN). When the signal level is set at its source, its amplitude could be set to 0.775 V or 1.55 V (chosen by a switch on the mainboard).
The device can also control the input signal level automatically. To achieve this, a pre-compressing unit is used. Its attack time is about 4 seconds, and release time can be set between 120 and 300 sec. This reportedly results in nearly constant signal level at the input of the main compressing unit. The signal level at the input of the device could be from 100 mV to 5 V (measured between signal line and ground). Caution: When signal with long piano periods is applied, the effect may be compromised.
In analog compressors, when short release time is set, low-frequency input signals are considerably distorted. It occurs because the gain changes during a single period of the signal. The Lipinski patented circuit claims to “eliminate this effect thoroughly. Our compressors’ signal path is free of capacitors and integrated circuits.”