Hi
I'm developing PCM5142 with Pure Path Studio.
In pcm5142 data sheet 21P, it says 'The miniDSP can run up to 1024 instructions on every audio sample at a 48KHz sample rate'
Actually, I'm using 44.1KHz sampling rate. In PPS, If I use components, EQ and Click remover, it exceed resource. and its value is 603 (117.77% )
Why do I get an error when I do not exceed 1024?
and How to increase resource?
Hi Minkyo,
If you select the properties tab (and do not have any blocks selected) is the sample rate correctly set?
In addition, if you select the PCM5142App_1 framework and look at the properties menu, do you have the correct number of instructions (0x200)?
Please check those two things,
Thanks,
Paul
Hi, Pual.
When I tried to process with just I2S_In - EQ - Int8xOutROM, it was fine.
and When I tried to process with just I2S_In - Click remove- Int8xOutRom, it was fine
But I tried both of them together, it had the error.
Is it normal??
I attached PPS project file. Please check.
file : EQ + Click Remover.zip
Hi Minkyo,
Sorry for the delay, I had to do some reading to figure this out :)
The device is capable of completing 1024 instructions at 44.1kHz, but only 512 instructions are available for the user. See register map:
These reserved instructions are where some of the custom functions, like the interpolator and ROM functions are stored. These functions are available to the user, though. See below. I have created three flows, the first of which omits the 5-band EQ and it uses 234 instructions. The second implements the EQ, and uses 581 instructions, which is more than available. The final version, I use the 5-band ROM EQ component, which leverages the EQs in the reserved instruction section. That version uses 261 instructions.
Try switching the 5-band EQ with the ROM version, and see if you can get the functionality you want.
Thanks,
Paul
