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The Wwise Pitch Shifter plug-in can be used to change the pitch of an audio signal without affecting its duration. The plug-in can be used with complex polyphonic signals (i.e. not just voice for example) and allows pitch shifts upwards or downwards. It can also be used as a harmonizer when the dry signal is not completely attenuated (although the Wwise Harmonizer is the recommended solution for this).
Choosing the delay time parameter dictates the nature of artifacts that will heard using the algorithm. Short delay values can lead to amplitude modulations artifacts but do not suffer from distinct echo problem. On the other hand, using large delay values will no longer suffer from amplitude modulation problems and make the interval sound more in tune when compared to the dry signal on monophonic signals, but a distinct echo can be heard. Recommendation: A range between 10 ms to 100 ms is usually recommended for sounds that are just pitched (not harmonized). In those cases the echo is tolerable and high pitch resolution is not necessary since the original (dry) signal reference is not present.
The ideal delay time is dependent on audio content where signals with lots of transients (e.g. punches, drums, explosions,etc.) may benefit from smaller delay time settings while harmonic signals with more stable frequency content (e.g. voices, musical instruments, etc.) may work best with slightly larger delay time parameter values which provide more accurate frequency resolution.
The Wwise Pitch Shifter plug-in contains a series of properties, many of which can be edited in real-time and can be mapped to specific Game Parameters using RTPCs.
Interface Element |
Description |
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Inclusion
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Determines whether the element is included or excluded. When selected, the element is included. When unselected, the element is not included. By default, this applies across all platforms. Use the Link indicator (to the left of the check box) to determine or to set platform-specific customizations. When this option is unselected, the property and behavior options in the Property Editor become unavailable. |
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Name |
The name of the Effect instance. Effect instances are a group of effect property settings. They can be one of two types: custom instances or ShareSets. Custom instances can be used by only one object, whereas ShareSets can be shared across several objects. |
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Effect |
The type of effect. |
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Shared by (Used by) |
A list of objects that currently subscribe to the selected ShareSet. This field is called “Used by” when editing a custom instance of the Effect. |
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Opens a search field where standard alphanumeric entries filter out unmatching elements from the view. Learn more in Using Tables. Click the Close icon to the left of the search icon to close the search field and remove the filter.
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Returns the Effect property settings to their default values. This option is only available when editing a custom instance of the Effect. |
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Notes |
Additional information about the Effect. |
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Effect Settings | ||||||
Input |
This parameter determines which channels will be processed by the pitch shifter. Values:
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Process LFE |
This parameter determines if the LFE channel will be processed by the pitch shifter. Default Value: False |
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Delay Time |
Larger delay time reduces amplitude modulation artifacts but can create distinct echoes. See section above for a more detailed discussion on how to choose the value for this parameter. Default Value: 50 |
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Delay Dry |
Determines whether the dry signal should be delayed to preserve synchronization with the transposed signal (wet path). Default Value: False
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Pitch Shift |
The pitch is raised or lowered by the amount specified by this parameter (in Cents). So, +1200 Cents transposes an octave up and -1,200 is an octave down. This value supports RTPC and may be smoothly changed during playback without additional artifacts. Default Value: 0 |
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Filter Parameters | ||||||
Type |
Determines the type of filtering that can be applied to the transposed (wet) signal. The following filters are available:
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Gain |
The amount of the amplification of the transposed (wet) signal for the selected frequency band. Increasing this value “boosts” the audio signal. Decreasing this value “cuts” or attenuates the audio signal. Default value: 0
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Frequency |
The portion of the frequency spectrum that will be affected by the gain. Range: 20 to 20,000 |
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Q |
The area around the center frequency that will be affected by the change in gain. A low Q value means that the bandwidth range will be wide, and conversely a high Q value means that the bandwidth range will be narrow. Default value: 1.0 This control is not available when the Low Pass, High Pass, Low Shelf, and High Shelf curves have been selected. |
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Output Levels | ||||||
Dry level |
Gain applied to unprocessed signal.
Default value: -96 |
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Wet level |
Gain applied to transposed (wet) signal. Default value: 0 |
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