Hi AID's

One of the customers is developing the ADAU1401a and she wants to control pitch and volume precisely.

she would like to be able to adjust to two decimal places as much as possible to implement the function.

(Assuming that the input signal is 100% frequency, wants to control it like this: 100% -> 102.55%)

In Sigma Studio, the Pitch Shifting and volume controls appear to work only with numbers

I do not think it's supported by blocks, is there any special way?

Thank you

Hello Andrew,

There is a cell that is a VCO. It will vary the pitch with a DC input but I do not know if this kind of accuracy is possible. In the end it is being digitally synthesized to take a certain number of steps from the sine table per sample period and output the new value. So at very close to nyquist it will have only two sample to go up and then down. So the frequency resolution will become very poor at higher frequencies. So the big questions I have is this: What is the range of frequencies that this level of precision is required?

I will have to study this to see if it is possible once I have your answer.

I should also know what is the sampling rate required? Are they flexible with the rates?

I guess I have some more questions. How are they wanting to control the frequency? With a controller or with the AUXADC input?

With an up/down button?

Dave T