Intermittent USB Audio Delay Playback - Please Help!

HELP! New MacBook Air

Problem: USB intermittent input delay - Using USB - VEC Infinity Foot Pedal.

Details: I am a medical transcriptionist. I use the foot pedal to play voice files the doctor sends to me. Here is the problem: Using Word for Mac 2011.

1. I press the foot pedal and the file starts to play (no problem).
2. I lift foot OFF pedal to catch up with typing (no problem).
3. I put my foot back ON pedal to resume playing and now there is a 10-20 second delay before the file stars to play again!!!!!! UUGGGHHHHH!!!!!!

Variables:

1. The beginning of the file NEVER delays.
2. If I do not leave my foot off pedal for more than 2 seconds, there is NEVER a delay.
3. The delay happens for periods of time and then seems to resolve for no apparent reason.
4. When the USB audio play delay happens I have no delay in keyboard input or track pad input.
5. I cannot reproduce the problem on demand. It has a mind of its own.

Things I have tried to resolve issue to no avail:

1. Repair permissions and repair disk in disk utility.
2. PRAM and SMC reset.
3. Reboot in safe mode (not sure how this would work anyway but I tried it).
4. Reinstall Word for Mac.
5. Changed to different USP port. Problem still happens.
6. Replaced foot pedal, as well as tried different configurations for the driver.
7. Checked activity monitor for suspicious activity or program crashes. Nothing.
8. Reinstall Express Scribe. No help. Must use this program.
9. Turn off virus protection and time machine. (Uninstalled Webroot). No help.
10. Pull hair out, spin around 5 times, and kick the dog. No help.

I’ve thought about taking it in to the geek squad but I’m sure it wouldn’t do it for them and then I’m without my computer and unable to do my work. There is also the issue of patient information being compromised, so that is not an option unless I take everything off my computer. I hope someone can help me before I throw it out the window or my dog runs away.

Here is my computer setup:

Model Name: MacBook Air

Model Identifier: MacBookAir6,2

Processor Name: Intel Core i5

Processor Speed: 1.3 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache (per Core): 256 KB

L3 Cache: 3 MB

Memory: 4 GB

Boot ROM Version: MBA61.0099.B07

SMC Version (system): 2.13f7

Serial Number (system): C17M3J7QF5V7

Hardware UUID: C8DBADEF-ED2C-5DD1-90DC-7B78F952D8C7

System Version: OS X 10.9.2 (13C64)

Kernel Version: Darwin 13.1.0

Boot Volume: Macintosh HD

Boot Mode: Normal

Vendor: Apple

Product: SSD Controller

Physical Interconnect: PCI

Link Width: x2

Link Speed: 5.0 GT/s

Description: AHCI Version 1.00 Supported

APPLE SSD SD0128F:

Capacity: 121.33 GB (121,332,826,112 bytes)

Model: APPLE SSD SD0128F

Revision: A222821

Serial Number: 134847400524

Native Command Queuing: Yes

Queue Depth: 32

Removable Media: No

Detachable Drive: No

BSD Name: disk0

Medium Type: Solid State

TRIM Support: Yes

Partition Map Type: GPT (GUID Partition Table)

S.M.A.R.T. status: Verified

Volumes:

EFI:

Capacity: 209.7 MB (209,715,200 bytes)

BSD Name: disk0s1

Content: EFI

Macintosh HD:

Capacity: 120.47 GB (120,473,067,520 bytes)

Available: 91.07 GB (91,072,827,392 bytes)

Writable: Yes

File System: Journaled HFS+

BSD Name: disk0s2

Mount Point: /

Content: Apple_HFS

Volume UUID: 96F7CB70-7A54-3E0C-A323-AB4294057B03

Recovery HD:

Capacity: 650 MB (650,002,432 bytes)

BSD Name: disk0s3

Content: Apple_Boot

Volume UUID: 2975D468-6F7A-3542-AD38-B79835F0E077