El 1/4/2014 23:50, Henk-Jan van Tuyl escribió:
As far as I can tell, there is no good solution for this. You can try to get a stack trace[0][1], or, at Haskell level, find the location error with the GHCi debugger[2]
Check if you have the correct versions of dynamic libraries, if applicable. Note, that a missing dynamic library is not always reported properly; sometimes, GHCi mentions a missing dynamic library, while this is not reported when running a compiled program. For Windows, there are cygcheck and Dependency Walker to get an overview of the DLL dependencies.
Another problem, that might arise, is a changed calling convention; the Haskell binding to PortAudio uses ccall, the PortAudio C software might have recently adopted a different calling convention.
Regards, Henk-Jan van Tuyl
Thanks for the answer. Fortunately I could solve the problem (infortunately without knowing exactly what was causing it). I guess there is a bug in Sound.PortAudio module that causes the problem. What I did is to work directly with the bindings functions to the C Api in module Sound.PortAudio.Base and make my own `play` function (maybe some day publishing a package for easily playing and recording sound). -- Leza Morais Lutonda https://github.com/lemol