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| resources:tools-software:sigmastudio:toolbox:filters:mediumsizeeqslew [17 Nov 2016 19:06] – Prasad Kamath | resources:tools-software:sigmastudio:toolbox:filters:mediumsizeeqslew [29 Nov 2016 11:28] (current) – Mazher Khan | ||
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| - | ====Medium Size EQ Slew==== | + | =====Medium Size EQ Slew-(ADAU145x)===== |
| [[resources/ | [[resources/ | ||
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| - | {{ medpic1.png}} | + | {{: |
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| This block gives access to two general 2nd-order filters: Peaking and Shelving EQ. The algorithms driving this block are the same as for the other 2nd-order filters, but it simply offers an alternate layout and control of parameters that may prove more useful for your application. | This block gives access to two general 2nd-order filters: Peaking and Shelving EQ. The algorithms driving this block are the same as for the other 2nd-order filters, but it simply offers an alternate layout and control of parameters that may prove more useful for your application. | ||
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| - Choose which algorithm meets your needs. | - Choose which algorithm meets your needs. | ||
| - Click the blue icon to choose which filter you want to implement: Peak or High- / Low-Shelf. | - Click the blue icon to choose which filter you want to implement: Peak or High- / Low-Shelf. | ||
| - | - Double-click right in the middle of the block to bring up the EQ parameter window: | ||
| - | {{ idxpic2.png }} | ||
| - Select from the dropdown menu which of the two types of filters you want and enter the parameters desired. Peaking is the default. | - Select from the dropdown menu which of the two types of filters you want and enter the parameters desired. Peaking is the default. | ||
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| **Peaking EQ** | **Peaking EQ** | ||
| Peaking boosts or cuts a designated center frequency. | Peaking boosts or cuts a designated center frequency. | ||
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| __Q:__ Set the Q you want (max 51) by entering a value in the field, clicking its arrows, or using the concentric knobs, where the outer one controls the integer value and the inner one the decimal value. Q governs the narrowness of the filter, being the ratio of the center frequency to the half-power points (-3dB) on either side. The higher the Q the faster the transition between passband and stopband. | __Q:__ Set the Q you want (max 51) by entering a value in the field, clicking its arrows, or using the concentric knobs, where the outer one controls the integer value and the inner one the decimal value. Q governs the narrowness of the filter, being the ratio of the center frequency to the half-power points (-3dB) on either side. The higher the Q the faster the transition between passband and stopband. | ||
| - | __Slew: | + | __Slew(s):__This field sets the slew time(seconds) for slewing of filter coefficients when a filter parameter is changed. The slew computation is in single precision and implements RC slewing. The slew time can be set between 0-1 second. |
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| This is a quick and versatile block, as can be seen by comparing the below curves with their settings. It is highly useful for developing an educated ear. | This is a quick and versatile block, as can be seen by comparing the below curves with their settings. It is highly useful for developing an educated ear. | ||
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| Negative gain and shallow Q (above) produce this: | Negative gain and shallow Q (above) produce this: | ||
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| while positive gain and narrower Q (same scale gain and same frequency; below),\\ | while positive gain and narrower Q (same scale gain and same frequency; below),\\ | ||
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| __Shelving EQ:__ Low / High Shelf | __Shelving EQ:__ Low / High Shelf | ||
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| __Scale Gain (dB):__ This value controls the overall gain of the filter. Enter it in the field or click the arrows at right. | __Scale Gain (dB):__ This value controls the overall gain of the filter. Enter it in the field or click the arrows at right. | ||
| - | + | __Slew(s): | |
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| Handy for ear training, this is a quick and versatile block, as can be seen by comparing the below curves with their parameters. \\ | Handy for ear training, this is a quick and versatile block, as can be seen by comparing the below curves with their parameters. \\ | ||
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| As with Peaking, Shelving parameters may be changed handily and the results immediately checked for audible effect. | As with Peaking, Shelving parameters may be changed handily and the results immediately checked for audible effect. | ||
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| + | **NOTE: Due to fixed point operations, the filter coefficients do not slew exactly in the set slew time. | ||
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resources/tools-software/sigmastudio/toolbox/filters/mediumsizeeqslew.1479405965.txt.gz · Last modified: 17 Nov 2016 19:06 by Prasad Kamath