Sigma Studio: Can one potentiometer output to multiple blocks?
I'm attempting to connect a tone control (high shelf) to the same 'ADC In' as the volume knob. I want a little boost above 4khz when the volume is lowered. I can definitely do this using two knobs, but I want it to be the volume knob. I cannot seem to connect two outputs from the 'ADC In' block and I can't otherwise figure out how to split or attenuate the 'ADC In' signal from the volume knob to control the tone control. Is this possible?
Audio Signal Processors
Sigma Studio / ADAU1701
Audio Products
software
4.5
sigmastudio
SigmaDSP Audio Processors
adau1701
Show More
Hello,
The example below shows a way to control both volume and an index filter from one Aux ADC:
Source DC1 and multiplier X1 convert the 0.0 -- 1.0 decimal (5.23 format) Aux ADC output to a 0 -- 31 integer (28.0 format) signal. Junction T1 allows you to route this to both Lookup Tables. Lookup Table 1 outputs a 0 -- 7 integer signal to drive the Index Filter. Lookup Table 2's output is 0.0 -- 1.0 decimal for the Volume block. Download the project attached below and click the Table and Filter curve buttons to see their internal settings. The project as shown runs on a ADAU1701MINIZ eval board, which has its single pot wired to Aux ADC 3. If using different hardware, choose the correct Aux ADC, then set the corresponding MP pin in the HW Configuration / Register Settings for that Aux ADC.
For more background information, look up the Wiki entries for each block. If you're unfamiliar with the SigmaDSP number formats, see this document.
Best regards,
Bob
4113.Vol-HF-shelf.zip
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