Thanks for the tip

sudo padsp nasd -local -b

plays wav files for me but "beep" still make just a crackling pop

tried loop:
    
      if market last price threshold $0.10 play wav
      enable all rules

seems that it triggers just once and stops the loop - just shows processing afterwards but:

     if market last price threshold %0.01 play wav
     enable all rules

works fine so it must be somthing with $ part..