REMOVE NOISE

[AndyF]

Testing different schemes with different pcbs, in all I find that there is background noise.
It's a shhhhh, quite annoying.
In some effects it is heard more than in others, but in all it is present, has anyone been able to filter it without affecting the audio?

[frank]

Did you read this topic: http://www.spinsemi.com/forum/viewtopic.php?f=2&t=868

[AndyF]

Did you read this topic: http://www.spinsemi.com/forum/viewtopic.php?f=2&t=868

Thanks I had not read it, the test may be interesting, the problem is that it does not indicate which regulator to use, other than L78L33? Can you indicate which one or which I can try?
Thank you

[frank]

As he said, any modern LDO type. Just search whoever you get parts from for a 3.3V LDO and select the one you like based on current, price, etc.