Playback open error: Device or resource busy

Program received signal SIGINT, Interrupt.
[Switching to Thread -1224231232 (LWP 13033)]
0xb7438f8b in nanosleep () from /lib/tls/libc.so.6
(gdb) bt
#0  0xb7438f8b in nanosleep () from /lib/tls/libc.so.6
#1  0xb746fe4a in usleep () from /lib/tls/libc.so.6
#2  0x080ed583 in psy::core::AlsaOut::Start (this=0x834f398)
    at psycore/alsaout.cpp:96
#3  0x080ed5b7 in psy::core::AlsaOut::Enable (this=0x834f398, e=true)
    at psycore/alsaout.cpp:87
#4  0x080b00a6 in psy::core::Player::setDriver (this=0x812ae20, 
    driver=@0x834d5b0) at psycore/player.cpp:500
#5  0x0805edb6 in MainWindow::setupSound (this=0xbfae942c) at mainwindow.cpp:77
#6  0x0805efc1 in MainWindow (this=0xbfae942c) at mainwindow.cpp:41
#7  0x080668b8 in main (argc=Cannot access memory at address 0x0
) at qpsycle.cpp:10