dbx Pro 386 user manual Appendix C

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Appendix C

Type IV™ White Paper

386

 

 

 

 

 

 

 

 

 

 

 

Amplitude

High-Frequency Information Completely Lost

High-Frequency Content

A/D Clip Level

Low-Frequency Content

Time

A/D Clip Level

High-Frequency Information Completely Lost

Figure 3c - Disproportionate Loss of High-Frequency Information Due to Clipping

Amplitude

0 dB FS

A/D Clip Level

-4

} TYPE IV™ Over Region

 

Time

-4

} TYPE IV™ Over Region

 

0 dB FS

A/D Clip Level

Figure 3d - Type IV Mapping Preserves High-Frequency Information

Now you’re probably wondering, “What’s the catch? I can’t get something for nothing so what did I give up?” You may be worried that your A/D noise floor got 4 dB worse because we borrowed the top 4 dB of your converter. This is certainly a valid concern. Fortunately, we have the answer! Without going into the confidential technical details, by using our proprietary analog and digital Type IV™ processing, we reclaim the original A/D noise level! So what you get is free headroom!

The benefits of the dbx Type IV™ Conversion System can easily be heard by switching it in and out while lis- tening to signals with high-level peaks captured in the Type IV™ Over Region. You will notice an obvious audible dif- ference. With Type IV™ bypassed, you can’t help notice the harsh, edgy sound of the A/D converter clipping. With Type IV™ enabled, those nasty artifacts disappear revealing a more open and natural sound. With Type IV™ enabled, you will get a more accurate and pure representation of the original wide-dynamic-range signal. You will absolutely agree that we really do give you “something for nothing.” We give you peace of mind knowing that you never have to worry about clipping your A/D again! And when you listen to the noise floor of your A/D, you’ll realize that we never compromise your noise performance with Type IV™!

The dbx Type IV™ Conversion System succeeds in combining the best of the analog and digital worlds to cap- ture the truest essence and fullest dynamic range of audio signals. Who else but dbx would bring you this technology!

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386 User Manual

 

 

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Contents 386 Important Safety Instructions Declaration Conformity Table of Contents 386Intro Introduction DefiningIntroduction Service Contact Info WarrantyInstallation Recommendations Getting IEC Power Cord Receptacle Getting Started Rear Panel ConnectionsGetting Started Front Panel ControlsMeter Select Switch Front Panel Type IV conversion system controlsAnalog Connection to a Mixing Console Analog ApplicationsBasic Analog Connection Direct Connection to a Recorder Page Digital Digital Applications Digital Output Front Functions Digital Output Rear Panel ConnectionsDigital Applications Sync Input Sample Rate SelectionDirect Connection to a DAW CPU Rear Panel ConnectionsSection Direct Connection to a Digital MixerDigital Applications A/D Conversion Multi-Tracking to Digital Digital Applications Analog and Digital Output Application Appendix Sync Input Info Fig. A.1Block Diagram BlockBy Roger Johnson Type IV White PaperAppendix C Appendix C Appendix C Appendix C Appendix TruncationAppendix D Harman International Company
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