Part Number: PCM3070 Other Parts Discussed in Thread: COEFFICIENT-CALC Dear All
We want to make GUI that can control PCM3070,
we try to calculate the biquad coefficient for EQ, base on "PCM3070 Application Reference Guide" SLAU332, page 23:
#…
hi Jeffres
the tools https://www.ti.com/tool/COEFFICIENT-CALC is not support tac5111, tac5111 require 32 bits filter coefficients for N0, N1, N2, D1, but the tool COEFFICIENT-CALC generate 16 bits filter coefficients .
and the support products from…
Hi Sebastien,
I am curious if the all-zero filter has the effect you intend (no-pass)? You can use this tool to calculate coefficients for specific biquad filters at 8kHz FSYNC: https://www.ti.com/tool/COEFFICIENT-CALC
I would try a 1kHz notch instead…
Hi Falguni,
See section 10.3.4.1 for details including the transfer function of the filters
You load the coefficients into the Audio Effects Registers found in Page 1.
In order to calculate the coefficients from a desired frequency response, there…
Hi Matt,
No you don't need PurePath for this.
You just need to use a biquad or a first order IIR which are available in most of the processing blocks. Check section 2.3.3.1.10 "User Programmable Filters" in the application guide.
If you need help…
Hi Kawasaki-san,
This is feasible, but first-order LPF/HPF would be achieved by setting N2&D2 to zero.
You can use this tool and select LPF/HPF in "Type" and it will generate these coefficients: https://www.ti.com/tool/COEFFICIENT-CALC
Best,
…
Hi Rayna,
We have a filter coefficient calculator found here: https://www.ti.com/tool/COEFFICIENT-CALC
You can use it to configure first order filters for your application, it will output the coefficients to implement.
You can then program the values…
Hi Zou,
I see, a Butterworth LPF should just be a first-order filter, so would not need second-order coefficients. I will refer you to some tools we have to help design these:
App note for designing biquad filters in this device family: https://www…
Hi Rob,
It is a little harder to deconstruct your coefficients for your filter, so instead I will explain my steps to get coefficients. First, you can use the TIBQ tool downloadable here: https://www.ti.com/tool/COEFFICIENT-CALC
This GUI allows you…
Hi Luo,
Page 0 Register 29 D3 controls loopback. ADC data will be used as DAC input, not I2S from MCU.
Your code also does not contain any EQ filtering. You must write the biquad coefficients you desire to the following registers
Adaptive filtering…
