vampm asked:

"I wonder how to make an "old radio" effect wih audiomulch, so the output is like from 1920's -1940's radios, with the simplest method"

This patch is maybe not the simplest method but it demonstrates some techniques:

• ParaEQs to filter the voice to a narrow band
• Shaper to add distortion
• TestGen noise (with highpass filtering) to broadband noise
• DLGranulator granulated noise for random static
• RingAM combine with sine tones to generate "heterodyning" effect. I've automated the sine which sound kind of crap. Maybe there's a better way to do this.

Press Play on the File Player to hear the voice. Or load your own sound. You could also use a SoundIn to process a live input.

You could simplify this patch by using less EQs, less Shapers, maybe ditch the heterodyning.