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Noise Reduction Manual

The procedure below describes adding only noise

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Unformatted text preview: y double-clicking and clicking the FX Plug-In Chooser’s OK button. The Noise Reduction dialog will appear. 3. On the Noise Reduction dialog, click the Capture Noiseprint check box. 4. Make a time selection in Vegas. (Make sure the tracks you want to apply Noise Reduction to are assigned to the Assignable FX with the Noise Reduction plug-in.) 5. On the Vegas transport bar, click the play ( ) button. (If loop play is enabled, click the stop ( ) button. Otherwise Vegas will continue playing the time selection.) After the noiseprint has been captured, use the Noise Reduction controls to edit. TIPS AND FREQUENTLY ASKED QUESTIONS APPENDIX A 61 Using the pre-fader function with Assignable FX We recommend using Assignable FX as pre-fader sends in Vegas. To set a track’s FX as pre-fader sends, do the following: 1. Click the Track send fader’s label to display a drop-down list of busses and Assignable FX. 2. Click the Assignable FX that has the Noise Reduction plug-in. 3. On the Send fader, right-click and choose Pre Volume from the sub-menu. 4. Make sure the Send fader is set to -Inf. Otherwise. you will hear a mix of unprocessed and processed sound. Creating a new file with processed output You can “isolate” the processed mix in Vegas for future projects by doing the following: 1. Mute all unwanted tracks. 2. From the File menu, choose Save As. The Save As dialog will appear. 3. From the Save as file type, choose the file format that you want to use. 4. Type a file name and click the OK button to save the mix to a new file. Note: You may also create a new processed track by muting all unwanted tracks and choosing Mix to New Track from the Tools menu. APPENDIX A TIPS AND FREQUENTLY ASKED QUESTIONS 62 Click and Crackle Removal The following section relates to tips and questions as they apply when using Click and Crackle Removal. Choosing between Vinyl Restoration and Click and Crackle Removal The Vinyl Restoration and the Click and Crackle Removal functions are useful to solve similar problems. Generally, Click and Crackle Removal will perform better at removing the impulsive noise from both vinyl and old 78’s. The reason is that Click and Crackle Removal can be tuned for fewer artifacts. If surface noise remains, use the Noise Reduction plug-in to remove it. The Vinyl Restoration function is simpler to use for removing surface noise and clicks. However, Vinyl Restoration has difficultly removing smaller clicks and crackling and may remove percussive attacks from the sound source. Can I set Click and Crackle Removal so it keeps high hats and cymbal hits? With some source material, Click and Crackle Removal has difficulties in distinguishing between strong percussive hits and click noise. To set Click and Crackle Removal from removing percussive sounds, lower the Max click size until the percussive hits are not being affected (about 0.8 milliseconds before every cymbal hit is left untouched). However, lowering the Max click size too much might prevent the removal of larger “pop” noises, which you will have to remove manually. Alternatively, use the Sound Forge 4.5 Graphic Fade process. To use the fade process, do the following: 1. Make a small selection around a click. 2. From the Process menu, choose Fade and then Graphic sub-menu. Leave the endpoints at 100% and create two new envelope points at 0% to mute the click. If the silence is too drastic, adjust the envelope points to 25% attenuation. Using the Keep residual output check box to fine tune parameters Both Noise Reduction and Click and Crackle Removal plug-ins allow you to listen to the audio that is being removed. When the Keep residual output check box is enabled, you can adjust settings while listening to just the noise and clicks. This function helps you determine how much noise is being removed and if it is affecting the original signal. Also, it can help you understand how each of the parameters influence the output. TIPS AND FREQUENTLY ASKED QUESTIONS APPENDIX A 63 APPENDIX Glossary B Applications Programming Interface (API) A standard set of instructions developed by hardware and software manufacturers to allow 3rd party development for a product. For example, many hardware manufacturers have API’s that allow applications to use the processing power of chips on the hardware. Broadband noise Noise which spans a wide range or band of frequencies. Click A sudden, rapid increase in the slope of a waveform can create a click. Clicks can be caused by various means, including interruptions in the digital data stream or debris in the channels of a vinyl record. Decibel (dB) A ratio expressed in logarithmic terms. The decibel is used frequently in sound measurement applications. A decibel measurement by itself is technically meaningless if it is not referenced to anything. For example a reading of -12 dB tells the reader nothing. -12 dBV or -12 dBu are meaningful because the reference of the measurement (V for 1 volt or u .775 volts) is stated. Howeve...
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