On Mon, Apr 8, 2013 at 12:45 PM, Raphaėl BOLLEN <raphael.bollen@mobistar.be> wrote:
> error: invalid conversion from 'void*' to 'char*' [-fpermissive]


jack_ringbuffer_read() expects the buffer pointer to be of type  char* not void*.
The "char*" should just be interpreted as "pointer", as the data is data, which is not necessarily a char.

Change your case from (void*) to (char*) and you won't need -fpermissive :)
HTH, -H