How Can I record Audio Directly from a Notation Program

I want to record audio using an applet (NCH S/W SoundTap) as my notation s/w is producing output. I use outboard h/w synths whose audio outputs are patched into the Project Mix IO. No DAW is active. I am trying to avoid the extra steps of exporting to MIDI and importing into SONAR to create the audio file. SoundTap can record streaming audio from the internet (e.g. YouTube) but does not see (hear?) anything from the Project Mix.

Custom Built PC

<<< System Summary >>>

> Mainboard : ASUS Striker Extreme
> Chipset : NVIDIA's 680i
> BIOS : Phoenix ACPI Rev 0901 (2/7/2007)
> Processor : Intel Core 2 Quad Q6600 @ 2.4GHz
> Memory : 2 X 2048 MB DDR2-SDRAM Installed (3Gig 32-bit OS address limit)
> Video Card : Sapphire Radeon X1550 Series (Pri + Sec)
> Video Memory : 256 MB
> Hard Disks : (system) WDC WD1500ADFD 140GB ; (2nd) 3X WDC WD1500ADAF RAID5 Set 280GB ; (3rd) WDC WD10EARS 1TB
> DVD-Writer : Memorex DVD+RAM 550L v1 5M64
> DVD Reader : ATAPI DVD DH16D2P HP55
> Monitor Type: ViewSonic VX2035WM
> Operating System : Windows XP 5.1.2600 Service Pack 3
> Direct X : 9.0c

> Audio / MIDI Interfaces : {M-Audio Project Mix IO or M-Audio FireWire Ultra}
> Other Audio : Samson C-Control speaker switch matrix ; Alesis M1 Active Mk2 monitors ; Yorkville NX55 active speakers
> MIDI Interfaces : MIDISport 4X4 ; Novation ReMOTE 25 SL MIDI controller keyboard
> Hardware Synths : Korg X5DR ; Korg NX5R ; Roland HandSonic10
> DAW : Sonar 7 Producer Edition
> Notation : Encore 4.5.5 ; Finale 2012a