step1:when you want the clock is ringing? select hour: 01 or 13 02 or 14 03 or 15 04 or 16 05 or 17 06 or 18 07 or 19 08 or 20 09 or 21 10 or 22 11 or 23 12 or 24 select minute: 0001020304 0506070809 1011121314 1516171819 2021222324 2526272829 3031323334 3536373839 4041424344 4546474849 5051525354 5556575859

step2:browse your sound file:

step3:
if you minimize this window you can't hear any sound.