gregac / pico-stuff Goto Github PK

Hi, which software have you used to convert .wav samples to .h?
I've seen it is just a dump of all the samples into an array so shouldn't be difficult to program that, but I wanted to ask in case there is some already available tool to do it easily.

Hi,

When I tried the pwm_dma_led_fade code, the LED didn't light. The problem is that one line of the GitHub code doesn't match the code in the blog:

  fade[i] = 128 * 128;

... should be:

fade[i] = (i * i) << 16;

Thanks for writing the blog entries, by the way. It's the best source of information on the Pico DMA that I can find.

Dan.

In your article (https://gregchadwick.co.uk/blog/playing-with-the-pico-pt3/), it seems that your circuit will leave a DC component at the speakers. It seems to work but the constant current flow and force on the membrane might stress the speakers (silence will be at 0.4V instead of 0V). Was that intended (or am I just wrong)?