Steinberg WaveLab 7 Operation Manual
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7.3 Batch Processing Plug-ins 197 Multipass Plug-ins Multipass plug-ins require two or more passes (an analysis pass followed by a process pass) before processing the audio. Some are unique to the Batch Processor while others are also found as Offline Processors in the Audio File Workspace. The following Multipass plug-ins are available in the Batch Processor Workspace: Normalize Level Stereo to Mono Pan Normalizer Loudness normalizer Fade-out DC Remover Loudness Restorer Metapass Plug-ins Metapass plug-ins are unique to the Batch Processor and require several passes before processing the audio. After analyzing the audio, a metapass plug-in takes into account all other plug-ins in the effects chain before processing the audio. The following Metapass plug-ins are available in the Batch Processor Workspace: Meta-Normalizer Meta-Leveler Related topics Audio Plug-ins Offline processing 7.3.0.1 Audio Injector This dialog is exclusive to the Batch Processor Workspace and allows you to insert an Audio File at the beginning and/or end of the Audio File being processed. The inserted file can also be cross faded with the original Audio File, if required. You can access this dialog from from the Batch Processor Workspace via Plug-ins window > Monopass Plug-ins >AudioInjector . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Batch Processing Plug-ins WaveLab 7
198 Batch Processing 7.3.0.2 Trimmer This dialog is exclusive to the Batch Processor Workspace and allows you to remove a spec- ified duration (from 0ms to 60s) of audio from the head and/or tail of an Audio File. You can access this dialog from the Batch Processor Workspace via Plug-ins window> Monopass Plug-ins >Trimmer . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Batch Processing Plug-ins 7.3.0.3 Resizer This dialog is exclusive to the Batch Processor Workspace and allows you to adjust the duration of an Audio File. You can set a desired length of file and choose whether to insert silence after the end of the chosen duration. You can access this dialog from the Batch Processor Workspace via Plug-ins window> Monopass Plug-ins >Resizer . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Batch Processing Plug-ins 7.3.0.4 Fade-In/Out This dialog is exclusive to the Batch Processor Workspace and allows you to fade the be- ginning (Fade-In) or the end (Fade-Out) of a batch audio file. You can choose the length and shape of the fade, its duration and the gain you wish it to start/end at. You can access the fade out dialog from Batch Processing Workspace>Plug-ins win- dow >Multipass Plug-ins >Fade-Out . You can access the fade in dialog from the Batch Processor Workspace via Plug-ins win- dow >Monopass Plug-ins >Fade-In . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Batch Processing Plug-ins WaveLab 7
7.3 Batch Processing Plug-ins 199 7.3.0.5 Instructor This dialog is exclusive to the Batch Processor Workspace and is a special utility plug-in that allows you to "instruct" the next plug-in in the batch with information about the audio it needs to process. This is useful for situations where you want to use plug-ins that require an analysis stage. In effect, the Instructor plug-in turns a monopass plug-in into a dual pass one. Some Monopass plugins, such as Denoisers or DeBuzzer, need to learn about the audio they are to process before they can begin processing correctly. The "Instructor" plugin can help in this situation, since it can "teach" the next plug-in in the audio chain about the audio it is about to process. The Instructor plugin mustbe used as a pair: 1. The first instance replicates the start of the audio stream. This means the next plug-in in the chain will receive the start of the audio stream twice. 2. The second instance of the plug-in comes after the plugin being "instructed". It simply cuts out the extra audio injected by the first instance of the Instructor plug-in. This means, for example, that the Denoiser plug-in has time to sufficiently analyze the audio stream before the second stream start is injected. The "badly" processed first part of the stream is skipped by the second instance of the Instructor plug-in. You can set the Instructor plug-in to replicate up to 20 seconds of audio. Be careful not to set a value that is longer than the shortest file in the batch, otherwise a short file will be over truncated by the second instance of the plug-in. You can access this dialog from the Batch Processor Workspace via Plug-ins window> Monopass Plug-ins >Instructor . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Batch Processing Plug-ins 7.3.0.6 Time Stretch This dialog is exclusive to the Batch Processor Workspace and allows you to change the duration of an audio selection (usually without changing its pitch). For more information on the Time Stretch dialog parameters see Time stretching . You can access this dialog from Batch Processing Workspace >Plug-ins window > Monopass Plug-ins >Time Stretch . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Time stretching Batch Processing Plug-ins WaveLab 7
200 Batch Processing 7.3.0.7 Pitch Correction This dialog is exclusive to the Batch Processor Workspace and allows you to detect and change the pitch of a sound without affecting its length. For more information on the Pitch Correction dialog parameters see Pitch correction . You can access this dialog from Batch Processing Workspace >Plug-ins window > MonoPass Plug-ins >Pitch Correction . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Pitch correction Batch Processing Plug-ins 7.3.0.8 Normalize Level This dialog allows you to change the peak level of your Audio File. Enter the desired peak level (in dB) that you wish the audio selection to have. You can also use "Find current peak level" to obtain a report on the peak level of the current audio selection (or the peak level in the whole file, if "Process whole file if there is no selection" is selected in the preferences). You can choose to apply the same gain to both stereo channels (Stereo Link) or mix down to a mono file (Mix to Mono) with the assurance that no clipping will occur when both channels are mixed together. To normalize the selected audio, enter the desired peak level and click Apply. You can access this dialog by choosing Process>Level Normalizer... in the Audio File Workspace. This function is also available as a batch processing plug-in. You can access it from Batch Processing Workspace >Plug-ins window >Multipass Plug-ins >Normalizer . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Audio File editing Value editing 7.3.0.9 Stereo to Mono This dialog is exclusive to the Batch Processor Workspace and allows you to mix a stereo signal down to a mono one while being certain not to clip while mixing channels. You can choose to use the same peak level that the stereo file contains, or set the gain to be applied and/or the maximum level to be reached in the resulting mono file. You can access this dialog from the Batch Processor Workspace via Plug-ins window> Multipass Plug-ins >Stereo to Mono . WaveLab 7
7.3 Batch Processing Plug-ins 201 For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Batch Processing Plug-ins 7.3.0.10 Pan Normalizer This dialog allows you to ensure that both channels of a stereo file have the same level or loudness. Since loudnesss is more important than peak volume in the perception of sound, this is a powerful tool to get the best possible stereo balance. This process uses two passes to first analyze the audio and then render any level changes required. You must have a stereo selection in a stereo file to apply this process. You can access this dialog from the Audio File Workspace via Process>Pan Normalizer... . This function is also available as a batch processing plug-in. You can access it from the Batch Processor Workspace via Plug-ins window>Multipass Plug-ins >Pan Normalizer . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics 7.3.0.11 Loudness normalizer This dialog allows you to adjust the loudness of a file. Because it relates to loudness as opposed to maximum peak level, this tool works quite differently from the Level Normalizer. A typical application is to specify a loudness, for example -12dB, and the Loudness Normalizer processes the audio to match this level of loudness. Like Gain Change, increasing the loudness to a certain value can introduce clipping. To avoid this occurring, a peak limiter (the Peak Master plug-in) can be used as part of the process. The Loudness Normalizer raises the loudness and limits peaks in the signal at the same time (if needed), to achieve the target loudness. In the case of stereo files, both channels are processed independently. This process happens over several stages; analysis precedes the final rendering. The Loudness Normalizer dialog gives access to useful statistics about the file and the Loudness distribution tool, and you can choose to remove any DC offset in the file. You can access this dialog from the Audio File Workspace via Process>Loudness nor- malizer... . This function is also available as a batch processing plug-in. You can access it from Batch Processing Workspace >Plug-ins window >Multipass Plug-ins >Loudness Nor- malizer . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help WaveLab 7
202 Batch Processing Related topics Loudness DC Offset Loudness distribution 7.3.0.12 DC Remover This dialog is exclusive to the Batch Processor Workspace and allows you to eliminate any DC Offset from an Audio File. It can be useful to apply this plug-in first in a batch before other plug-ins to avoid further processing a file containing any DC Offset. For example, an Audio File that has a DC offset will not be at its loudest possible volume when normalized, because the offset consumes headroom . You can access this dialog from the Batch Processor Workspace via Plug-ins window> Multipass Plug-ins >DC Remover . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Batch Processing Plug-ins DC Offset 7.3.0.13 Loudness Restorer This dialog is exclusive to the Batch Processor Workspace and allows you to restore the loudness of an Audio File. The Loudness Restorer plug-in mustbe used as a pair - the first instance is used to read the audio signal, the second instance uses this information to adjust the loudness or peak level of the file. To use the plug-in: 1. Place an instance of the plug-in in the batch chain and choose "Capture" as the mode. 2. Place a second instance of the plug-in after the first one and choose either "Restore peak level" or "Restore loudness (RMS)". You can access this dialog from the Batch Processor Workspace via Plug-ins window> Multipass Plug-ins >Loudness Restorer . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Batch Processing Plug-ins WaveLab 7
7.3 Batch Processing Plug-ins 203 7.3.0.14 Meta-Normalizer This dialog is exclusive to the Batch Processor Workspace and allows you to normalize a batch of files all to the same level. The core purpose of this plug-in is to achieve the sameloudness in all files (the highest loudness found, if possible), while being certain that no file will clip. For each file, a specific gain is computed by the plug-in once all files have been analyzed and prior to actually applying any gain to achieve the common loudness. If it is not possible to match the highest found loudness, the level of the file with the highest loudness is reduced, so that other files can get the same loudness. You can choose between peak level or loudness (RMS) as a method of determing the "equal" level between all files in the batch. This "equal" level is then used to apply a gain to each file in the batch. You can access this dialog from the Batch Processor Workspace via Plug-ins window> Metapass Plug-ins >Meta-Normalizer . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Batch Processing Plug-ins 7.3.0.15 Meta-Leveler This dialog is exclusive to the Batch Processor Workspace and allows you to match the level of a batch of files. The core purpose of this plug-in is to to apply the samegain to all files, while being certain that a specific peak level will never be exceeded in any file. The unique gain that you wish to apply is (possibly) reduced by the plug-in, once all files in the batch have been analyzed, and prior to actually applying the gain across the batch. You can access this dialog from the Batch Processor Workspace via Plug-ins window> Metapass Plug-ins >Meta-Leveler . For an explanation of each parameter and interface feature, click on , or the 'What's this?' question mark icon. For more information see Getting Help Related topics Batch Processing Plug-ins WaveLab 7
Chapter 8 Podcasts About Podcasts Once set up, you can produce high quality audio podcast episodes directly from WaveLab. Audio podcasts are ordered and commented sets of digital Audio Files, generally in the form of 'episodes' with a consistent theme or presenter. Episodes may be downloaded from the Internet, usually via an automated feed. Compression is an important consideration in exporting an audio podcast file, since the listener is likely to encounter bandwidth bottlenecks, so the file formats .mp4a, .mp3 and Ogg Vorbis are commonly used for podcasts. The Podcast window The Podcast window is divided into two panes. The upper pane shows the information for the Feed or an Episode, depending on the item selected in the list below. This is where you will be adding files, Internet links or textual information to the Podcast feed and its episodes. The lower pane shows an item list of the basic feed and all Episodes included in the Podcast. Adding, moving and deleting episodes There are two ways to add an episode to a Podcast: ˆ Select "New" from the Podcast window's Episodes menu. This will add a new untitled episode without any information being present. ˆ Select an existing episode in the Podcast window's item list, then select "Duplicate" from the Episodes menu. This adds a new episode, copying all information from the ex- isting episode to the new one. Episodes can be re-ordered using the "Move up/down" functions in the Episodes menu, or by dragging them to a new location in the item list. See Dragging operations for more information. To delete an episode, select it in the item list and use the "Delete selected" function in the Episodes menu. Alternatively, you can exclude an Episode from the Podcast by unchecking the "Enabled" box. There must be at least one episode present in the Podcast.
206 Podcasts Adding information to the Podcast The upper pane of the Podcast window shows various fields and settings that are related to the basic Feed or Episode, depending on what you have selected in the lower pane's item list (the fields are slightly different for the Feed and Episodes). Field labels in bold letters point at a field that is mandatory to fill. For quick publishing of your Podcast it is sufficient to fill these fields only. The following settings are available for the Feed and Episode items: ˆ Title This sets the title of the feed (e.g. the topic of your podcast). This is a mandatory field for Feed and Episode. ˆ Description This gives space for a further description of the feed content. This is a mandatory field for Feed and Episode. ˆ Internet link (URL) Your feed's main link presented to the user. Use this to direct people to a certain website that is related to your feed. This is a mandatory field. Clicking will open the specified URL in your system's default Internet browser, so make sure that the link is correct. This is a mandatory field for Feed. ˆ Picture (Feed only) This picture cannot be larger than 144 x 400 pixels according to the RSS standard, so the picture is automatically resized if required. Clicking will open the specified picture in your system's default image viewer. ˆ Audio file (Episode only) This sets the path to the Audio File you want to add to the episode. The Audio File could be any file type that is supported by the web browser's media reader, but an .mp3 file is best for compatibility. Clicking the button lists the Audio Files already open in WaveLab. Select one for your episode. Alternatively, you can drag the icon of an Audio File into the Audio File pane. Clicking opens the specified file in your system's default media player or viewer, as a preview or check. ˆ Publication date and time This sets the publication date and time of the Feed or Episode. Clicking the "Now" button will transfer your system's current date and time. For the Feed, if "As most recent episode" is checked, this automatically matches the date and time of the most recent Episode. Related topics FTP site Episodes menu Publish menu Specific tool windows WaveLab 7