for (int i = 0; i < _channels; ++i) {
_channel_checkbox[i] = new wxCheckBox (this, wxID_ANY, std_to_wx (audio_channel_name (i)));
right->Add (_channel_checkbox[i], 0, wxEXPAND | wxALL, 3);
for (int i = 0; i < _channels; ++i) {
_channel_checkbox[i] = new wxCheckBox (this, wxID_ANY, std_to_wx (audio_channel_name (i)));
right->Add (_channel_checkbox[i], 0, wxEXPAND | wxALL, 3);