QSC Audio DSP-3 manual Appendix- Preset Operation Notes, Reason

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Section 5: Appendix- Preset Operation Notes

SPECIAL INFORMATION CONCERNING SAVED DSP-3 CONFIGURATIONS

The computer which is used to create the DSP-3 signal flow configurations, and subsequently save them to disk, should be the same computer used to modify and adjust the DSP-3 settings in the future. Naturally, this might not always be the case. At the least, a copy of the DSP-3 configuration(s) should be saved to floppy disk, so the configuration files can be transferred to whatever computer(s) might be used to adjust or modify the DSP-3 module settings in the future.

The reason:

The Signal Manager software works in conjunction with the DSP-3 module to

create specific signal processing algorithms for filters, delays, limiters, and the like. The algorithms are displayed on the computer screen as ”configuration files”, with graphical representations of each function and parameters. The user creates a signal chain, “wiring” together blocks of functions as needed for each particular audio channel or channels.

When you build a DSP-3 configuration from scratch, or load one from disk, and perform an “Apply to DSP” operation, the information downloaded into the DSP-3 module is NOT the graphical representation of what is displayed on the screen. The downloaded information consists of the compiled algorithm coefficients of the functions, i.e. “just the math”. If building a new configuration from scratch, when you apply it to the DSP-3 you will also be prompted to save it to disk as a Configuration file. The path for this Configuration file is then associated with the compiled information that is applied to the DSP-3. A previously saved (to disk) configuration file may also be applied to the DSP-3, and that particular file path is associated with the algorithms now loaded in the DSP-3.

When you connect a DSP-3 to a computer, the Signal Manager software first attempts to locate and display the configuration file that has been associated with the algorithm coefficients currently running in the DSP-3, to correlate “what you hear” with “what you see”. This would allow you to further adjust a delay or a filter parameter, for instance. If the correct file is located, based on the associated path name, the graphical configuration is displayed. If the file is not found (the file has been renamed, moved, deleted, or you are not using the same computer on which the DSP-3 was originally configured) the computer will display a message asking if you would like to load the Default configuration.

Answering YES will load the Default (factory) configuration TO THE SCREEN, but will not apply it to the DSP-3. Answering NO will merely display a blank workspace to the screen with no configuration loaded. At this point, what is displayed is NOT what is currently running in the DSP-3 memory.

IF YOU PERFORM AN “APPLY TO DSP” NOW YOU WILL OVERWRITE WHATEVER IS CURRENTLY RUNNING IN THE DSP-3! This is likely NOT what you want to do. Instead, locate the desired configuration file (from an alternate path or from floppy) using the Configuration->Open menu (Ctrl-O).

When the proper configuration file is displayed on the screen, go to the Configuration->Editmenu (Ctrl-E), followed by an Apply to DSP command (Ctrl-D). This will download the currently displayed configuration back into the DSP-3 (overwriting itself), allowing synchronization of what is displayed with what is running in the DSP-3. At this point, you may adjust parameters or modify settings as usual.

QSC engineers are currently developing an improvement to this process, in which the computer would always be capable of displaying the currently running configuration, regardless of the location of the configuration file (or lack of the file).

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Contents DSP-3 Amplifier Accessory Hardware ManualPage Table of Contents Federal Communications Commission FCC Information Introduction- Overview Introduction- DSP-3 General Use Guidelines Turn the Equipment OFF & Install the Hardware Introduction- Quick StartConnect the Computer to the DSP-3 Turn the AMP Gain DOWN, Power UP the Amplifier & the DSP-3 Channel 1 Input & Channel 2 Input connectorsConnect the Audio Inputs Install the Software What the Signal Manager Application Looks LikeEstablish Communication Between the DSP-3 & the Computer Create a Simple DSP ConfigurationIntroduction- Quick Start Front Panel Dataport unlabeled- This is the output Rear PanelIntroduction- List of Functions & Features Signal Level Meter Introduction- Block Diagram Audio Output Path Power SupplyData Acquisition Contact ClosureInstallation- Unpacking and Mounting Page Balanced connection is recommended for all inputs Installation- ConnectionsPuter VGA cables as they are not correctly constructed for DAISY-CHAINING the DSP-3 Outputs to Additional Amplifiers Power SourceInstallation- Application Examples Installation- Application Examples Installation- Application Examples Software Installation Signal Manager Software- Software InstallationSignal Processing 24 bit, 48 kHz SpecificationsPower amplifier connectivity RS-232 PortGeneral DimensionsGain Threshold Attack time Release time Architect’s and Engineer’s SpecificationsDescription of Encode Signals Appendix- DataPort PinoutData Port Pinout Pin with Strain Relief Phoenix Contact 17 76 16 Appendix- RS-232 Port Pinout & Connector P-N’sApplication Information Appendix- Application InformationReason Appendix- Preset Operation NotesCleaning Maintenance, Warranty & QSC Contact Information
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DSP-3 specifications

QSC Audio has long been recognized for its commitment to delivering high-quality audio solutions, and the QSC DSP-3 is no exception. This advanced digital signal processor (DSP) embodies cutting-edge technologies, designed to enhance audio systems in a variety of environments, including live sound, broadcasting, and installation applications.

One of the main features of the DSP-3 is its exceptional audio processing capabilities, boasting 32-bit floating-point processing for superior sound quality. This ensures that audio remains clear and dynamic, with minimal distortion, even under demanding conditions. With a frequency response of 20 Hz to 20 kHz, the DSP-3 caters to a wide range of audio frequencies, ensuring no detail is lost in the sound.

The DSP-3 offers extensive input and output options, including multiple analog and digital inputs and outputs. This flexibility allows for seamless integration into existing sound systems, catering to various setups while accommodating different signal formats. Users benefit from the unit’s configurability, enabling tailored solutions for different applications.

One of the standout technologies integrated into the DSP-3 is its advanced FIR (Finite Impulse Response) filtering capabilities. FIR filters are known for their phase linearity, which is crucial for maintaining the integrity of the audio signal through the processing chain. This feature helps in achieving accurate sound reproduction, ensuring a natural listening experience.

Additionally, the DSP-3 comes equipped with a user-friendly interface, featuring real-time monitoring and control options. This interface allows sound engineers and technicians to swiftly make adjustments on the fly, resulting in optimized audio performance tailored to the specific venue or event.

Another notable characteristic of the DSP-3 is its robust protection features. With built-in limiters, compressors, and equalizers, the device safeguards audio equipment from damage due to excessive signal levels, while maintaining the best audio quality possible. This added layer of protection is invaluable in live sound scenarios, where unpredictable dynamics can occur.

Overall, the QSC DSP-3 stands out as a powerful and flexible digital signal processor that meets the needs of modern audio applications. Its combination of advanced processing capabilities, extensive connectivity, intuitive interface, and protection mechanisms makes it an essential tool for audio professionals aiming to achieve exceptional sound quality in diverse environments. Whether for live events, installations, or broadcast applications, the DSP-3 enhances audio performance and reliability, solidifying QSC's reputation as a leader in the audio industry.
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