PCM5142: Custom interpolator: RAM based hybrid flow

Hello, I have to  consult with my team and see who is the best person to  pass this ticket to ,may be I need to transfer the ticket to another group.

Regards,

Arash

Thank you Arash, 

I'm eager to start pouring my Matlab code into my PCM5142 board. If necessary via .h files. I have a lot of legacy FPGA filter code for interpolation. It will be very interesting to see how much of it will fly in the PCM5142. 

By the way, is PurePath 2.1 the right version for PCM5142 (and possibly PCM5242)?

Best regards, 

Børge 

I have passed along  your question to the team who can answer this. I  will let you know about what they say.

PurePath 2.1 would work for PCM5x42 as well.

Arash.

Hello Borge, I want to inform you that we generally don’t support custom interpolation filters or for that matter any custom PPS component development. A custom interpolation filter would need an update of both coefficient and instructions. Customers do not have the tools to build a custom component. It was supported when we used to distribute the PPS IDE. But we have stopped doing that for  many years now.

If it is a business case, let me know about it and I can do more follow ups with the team as a new miniDSP program will have to be written to match with the custom interpolator coefficients.

Regards,

Arash

Hi Arash, 

I certainly have a business case for this. How can we switch to a private channel to discuss it? My email address is borge@henryaudio.com

I'm excited to use the PCM5142 and PCM5242 for various products. They will partially be use to update a design that used PCM1704 with custom interpolation in an FPGA. That DAC used my own Laplace-to-Z conversion transform to achieve finite-duration FIR filtering. This is something I'm eager to port to the newer processing models and DACs

I am familiar with quite a few obscure low-level programming methods (Motorola 56k assembly just to name one) and won't bog down your support channel if you were to give me access to tools and documentation. 

Best regards, 

Børge

Thanks Borge. I will close the post here and continue via email.

Regards,

Arash

Hi Arash, 

Could you please get back to me on email? If you have already sent me an email, please let me know. 

I would like to present three specific business cases that will benefit greatly from us having insight into PCM5142 programming. 

We have purchasing decisions that are right around the corner, with dwindling stock at distributors.

Best regards, 

Børge

Hi Arash, 

Could you please get back to me on email? If you have already sent me an email, please let me know. 

I would like to present three specific business cases that will benefit greatly from us having insight into PCM5142 programming. 

We have purchasing decisions that are right around the corner, with dwindling stock at distributors.

Best regards, 

Børge