It should be fluid_synth_activate_octave_tuning(context->synth, jtuningBank, jtuningProgram, name, derivations, FALSE);
i.e. no quotes around FALSE and (char*) cast intentionally removed. FALSE is usually defined as macro which expands to 0 during compilation. Thus, if the above line doesnt compile, use fluid_synth_activate_octave_tuning(context->synth, jtuningBank, jtuningProgram, name, derivations, 0); Tom _______________________________________________ fluid-dev mailing list fluid-dev@nongnu.org https://lists.nongnu.org/mailman/listinfo/fluid-dev