It's too late to try this. Has anyone? I'll try tomorrow and if it works when I find a speaker try using a bit not a byte.
Code:
[color=Green]; 1 bit audio record and playback from 8ohm speaker[/color]
[color=Navy]#picaxe [/color][color=Black]28x2[/color]
[color=Blue]setfreq m16[/color]
[color=Black]main:[/color]
[color=Blue]wait [/color][color=Navy]5[/color]
[color=Blue]for [/color][color=Purple]ptr[/color][color=DarkCyan]=[/color][color=Navy]0 [/color][color=Blue]to [/color][color=Navy]1023 [/color][color=Green];record
[/color][color=Purple]@ptr[/color][color=DarkCyan]=[/color][color=Purple]pina.0[/color]
[color=Blue]next [/color][color=Purple]ptr[/color]
[color=Blue]wait [/color][color=Navy]5[/color]
[color=Blue]for [/color][color=Purple]ptr[/color][color=DarkCyan]=[/color][color=Navy]0 [/color][color=Blue]to [/color][color=Navy]1023 [/color][color=Green];playback
[/color][color=Purple]pina.0[/color][color=DarkCyan]=[/color][color=Purple]@ptr[/color]
[color=Blue]next [/color][color=Purple]ptr[/color]
[color=Blue]goto [/color][color=Black]main[/color]