Appendix A

DriveRack

A.1 MIDI SysEx

A.1.1 SYSEX MESSAGE FORMAT

SYSEX HEADER (SYS_HEAD

F0(h) System Exclusive 'Begin Message' byte 00(h)

01(h) Manufacturer's ID Number (dbx) 1E(h)

00(h) - 7F(h) Device ID (7F(h) means “everyone listen”)

On(h) or 7F(h) Product ID (each product has a unique ID - DriveRack ID is 03(h)

SYSEX Procedure and Data

pp

pp= Procedure number. The different procedure's names and general formats are described in the Procedures Section.

dd(1)1, dd(1)2

dd(n)1, dd(n)2

dd= Data as needed by procedures. Since the standard MMA MIDI Specification reserves 80(h) through FF(h) (decimal numbers 128 through 255) for specific commands, a split byte format is adopted for all data communication in this SYSEX implementation. dd(n)2 denotes the 1st through 7th bits of the nth byte and dd(n)1 denotes th 8th bit of the nth byte. Note: All data that is requested or received, is in split byte format unless noted otherwise.

SYSEX “Message End” byte

F7(h) System Exclusive 'End Message' byte

A.1.2 SYSEX Procedures

In the following section, SYS_HEAD refers to a valid System Exclusive header. The System Exclusive header starts with the System Exclusive status byte, and includes all bytes through the dbx Product ID. F7(h) is the System Exclusive 'Message End' byte. All SYSEX numbers in the format definition of each procedure are given as hexadecimal values, along with this symbol (h) for clarification. Binary numbers are identified with this symbol (b).

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DriveRack™ User Manual

 

 

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dbx Pro 480 user manual Midi SysEx, Sysex Procedure and Data, Sysex Message End byte, Sysex Procedures

480 specifications

The dbx Pro 480 is a professional-grade dynamics processor renowned for its versatility and exceptional performance in various audio applications. Designed for both live sound and studio environments, the dbx Pro 480 stands out as an essential tool for sound engineers and musicians alike.

One of the main features of the dbx Pro 480 is its dual-channel operation, which allows users to process two audio signals simultaneously. This functionality makes it particularly advantageous for stereo mixes, providing the ability to manage dynamics across left and right channels cohesively. The unit employs patented dbx OverEasy compression technology. This unique approach to compression allows for smooth transitions between compression and limiting, preventing abrupt changes in audio levels that can disrupt the listening experience. The result is a more musical sound, making it ideal for vocals, instruments, and other dynamic sources.

Additionally, the dbx Pro 480 boasts comprehensive control options, including adjustable ratio, threshold, attack, and release parameters. This level of control enables users to tailor the dynamics processing to fit specific audio material, whether subtle shaping or more aggressive control is required. The inclusion of a high-pass filter on the sidechain input further enhances its versatility, allowing for frequency-dependent dynamics processing that can be particularly useful in managing low-end rumble or controlling sibilance in vocals.

Another notable characteristic of the dbx Pro 480 is its robust build quality, designed to withstand the rigors of both studio and live environments. The device features a rugged metal chassis that protects its internal components while providing reliable performance under various conditions. Additionally, high-quality XLR inputs and outputs ensure that audio signals remain clean and free of interference.

In terms of connectivity, the dbx Pro 480 is equipped with balanced connections to minimize noise and signal degradation, making it suitable for professional setups. Its intuitive front-panel interface includes LED metering for easy monitoring of input and output levels, facilitating prompt adjustments on the fly.

In conclusion, the dbx Pro 480 is a powerful dynamics processor that blends advanced technology with user-friendly features. Its dual-channel processing, unique compression algorithms, and robust build quality make it a top choice for audio professionals seeking to enhance their sound with precision and control. Whether in a recording studio or a live performance setting, the dbx Pro 480 continues to be an invaluable asset in the audio processing landscape.