I agree with you on that one gbulmer, the data bit rate isn't extremely large. I also completely agree with you on the audio quality, i'm happy with my Cambridge Audio hi-fi, AKG Headphones and Tascam D/A, even with my young ears, I can't hear the difference between a 192kbps MP3 and a standard old Wav file, as much as i'm sure being an audiophile is good, I just don't seem to have good enough ears! I enjoy the music I listen to anyway so thats no worry. Great article though :)
As you probably know from one of my many last posts, i'm currently using two 8 bit PWM outputs summed together with a 1:256 resistor value ratio to produce the output, while this suffices for the current version of the project, its pretty noisy! And I can imagine that the phase difference between each PWM isn't amazing, not forgetting resistor precision.
Surprisingly, the TDA1543 has dedicated DACS internally as opposed to any delta sigma stuff, though it is from the very early 90's, probably why its so cheap!
Do you know if LeafLabs are going to be making any more of the maple series or have they decided to no longer bother? I've recently bought a PIC32MX440 which has a higher DMIPS than the ARM at cost of higher power etc. I've also got the ST discovery STM32F0 board (it was only £7 so I thought why not!)
And close! Its just a synthesizer project, i'm quite happy to have squeezed all the DSP processing into about 15us!
It was a good idea to use a stand alone waveform generator, it just unfortunately doesn't suit my needs!
I was considering using the AD1851 but it required a split supply which I unfortunately don't have!