numerical simulation

Hello javaboy,

javaboy said:
Can SigmaStudio do simulation without the help of hardware ADAU1452?

Yes, without hardware connected,

it can do things like plotting frequency response of a filter since most of the filter coefficients are calculated by sigma studio and you can see compressor curves etc. by changing the parameters.

You can also use table generator (tools>>fixed point filter table generator) to design a filter and see the frequency response and extract its coefficients.

Can you tell us what kind of simulation you would expect?

javaboy said:
I now have a 70MB voice signal

70MB file is quite too large. Even small files can't be stored in DSP RAM and played back except those file's which is not exceeded the DM memory.

Note that you can't connect SPI flash memory higher that 128Mb (16MBytes) for a single SPI device since there is a limitation with master control port SPI addressing.

It's a streaming processor, so there are no storage arrays/buffers present in the sigmaDSP to store the audio samples for long time. The SigmaDSPs have some delay memory for reverb and such operations but doesn't have any to store the audio and play back. The processor doesn't store any audio samples for long, each sample will just shift in by sport in and get processed and shift out by sport out. It all happens very quickly.

javaboy said:
but WavPlayer has requirements on the size of the file.

The is a version of wav player with trigger where it can be used to read PCM/WAV files from external Flash connected to the processor via SPI. You can refer the wiki page here. The audio files are usually in KB.

Regards,

Harish

I want to FFT a section of signal and display its spectrum diagram. Is there such a drawing module?