Dolby 362 Stereo Processor with two Dolby Trick Cards


In stock


This Dolby 362 comes with two Cat 22 cards modified for the “Dolby Trick”. Bands 1 & 2 have been bypassed so only the mid & high-frequency bands are lifted by the Dolby processing

The Dolby 362 is a 1U, two-channel Dolby processor compatible with Dolby A, SR and other noise reduction cards. Dolby A was used on millions of 16- and 24-track 2″ multitracks and also on 2-track tape masters. It’s a 4-band compander which boosts levels on recording and compensates on playback to reduce noise

A by-product of Dolby A encoding is that imparts a soft, breathy quality to voices. The encoding process lifts low-level high-frequency content and, by not decoding the signal, this processing can be used as an effect. This led to a few engineers using Dolby encoding for vocal processing when mixing, a procedure nick-named “The Dolby Trick”

The effect is level-dependent, with lower input levels resulting in the higher frequency bands being enhanced more than low frequencies. This means that by reducing the input level the effect can be increased

Many experiments have been done to alter the Dolby encoding and make it more usable as an effect. The simplest approach is to encode the signal and vary the input level to control the depth of the effect. This requires no modifications. Some have modified the Cat 22 cards to make the encoding adjustable via a front-panel pot. See the links below for details

The Cat 22 is the separate encode / decode card Dolby produced for Dolby A noise reduction. Subsequent systems like Dolby SR used the same rackmount hardware but replaced the Cat 22 with an alternate noise reduction card. This separation of the interface and encode/decode cards makes the system very flexible. If you want to modify a Cat 22 it’s simple to buy spare cards, modify them and plug them into the interface

The most common Dolby interface is the single-channel Model 360/361. This is a deep, heavy unit (5.5 Kg) with a non-standard mains connector. The 362 is the same size as a 361 but houses two Cat 22 cards, rather than one, and uses a standard IEC mains connector. This makes the 362 a much easier interface unit to live with than an old 361

Two channel Dolby rack, inputs & outputs via balanced XLR connectors. Remote switching via rear-panel connector. Compatible with early Cat 22 (Dolby A) and Cat 280 (Dolby SR) cards

Standard, but heavy, 19" 1U device suitable for all 19" racks. 220-240 Volt & standard IEC mains socket. Mains cable supplied on request

Instruction manual (Dolby 361)

Dolby Trick - GroupDIY

Dolby Trick - Gearslutz


Excellent used condition. Not tested 100%, tested to encode only. UK or Euro Schuko power cable supplied on request