Updated: Firewire audio recording on brand new iMac makes weird digital noise

I am running Ableton Live 8 Suite on a 2011 Entry level iMac. i am using an Maudio Firewire 410 with a FireWire 400 to 800 cable. recently when i record audio (say from a guitar) the audio will cut out and be replaced by a wierd low freq digital noise. i uploaded a clip of it. its not just static. it will come in and out as i play.
http://cl.ly/3f3R2H2z3H3K3F3z1P3d
Things i have tried:
-different guitars
-Maudio FireWire Solo (different interface)
-uninstalled and reinstalled the driver
-Different firewire cable
-turned off Bluetooth on computer and Bluetooth devices
-turned off airport
when i restart the interface or computer it works for about 5-10mins then cuts out again...
but i still get normal audio through it (iTunes, internet, even Ableton)
it seems to be isolted to just audio input. i had multiple tracks playing in Live. my input was working fine but when it punched in to record it morphed to the weird digital noise.
i could record a single channel fine with nothing else playing but recording with multiple channels playing seems to "lock up" the audio though i am only using 25% CPU...
is this something with my iMac or Lion? i changed out interfaces, cables, and drivers....thats the only thing i can think of…
any thoughts from you smart people out there?

ok so i tried a differnet cable and the same thing happened...
i had multiple tracks playing in Live. my input was working fine but when it punched in to record it morphed to the weird digital noise.
is this something with my iMac or Lion? i changed out interfaces, cables, and drivers....thats the only thing i can think of...

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Hardware Information:
          iMac (21.5-inch, Late 2013)
          iMac - model: iMac14,1
          1 2.7 GHz Intel Core i5 CPU: 4 cores
          8 GB RAM
Video Information:
          Intel Iris Pro - VRAM: 1024 MB
System Software:
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Disk Information:
          APPLE HDD HTS541010A9E662 disk0 : (1 TB)
                    EFI (disk0s1) <not mounted>: 209,7 MB
                    Macintosh HD (disk0s2) / [Startup]: 999,35 GB (548 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
USB Information:
          Apple Inc. BRCM20702 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Apple Inc. FaceTime HD Camera (Built-in)
          HP Deskjet D2300 series
          Western Digital Ext HDD 1021 2 TB
                    iTunes backup (disk2s1) /Volumes/iTunes backup: 1,1 TB (142,21 GB free)
                    Archive (disk2s2) /Volumes/Archive: 900,26 GB (490,8 GB free)
          Western Digital Ext HDD 1021 2 TB
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                    iTunes (disk1s2) <not mounted>: 1,1 TB
FireWire Information:
Thunderbolt Information:
          Apple Inc. thunderbolt_bus
Launch Daemons:
          [System] com.adobe.fpsaud.plist 3rd-Party support link
          [System] com.adobe.SwitchBoard.plist 3rd-Party support link
          [System] com.bombich.ccc.plist 3rd-Party support link
          [System] com.bombich.ccc.scheduledtask.B7A50B7A-D119-42A1-8C3E-EDF408B7B87E.plist 3rd-Party support link
          [System] com.bombich.ccc.scheduledtask.DC273830-C535-44B5-B601-D0F0504330F4.plist 3rd-Party support link
          [System] com.microsoft.office.licensing.helper.plist 3rd-Party support link
          [System] com.oracle.java.Helper-Tool.plist 3rd-Party support link
Launch Agents:
          [System] com.adobe.AAM.Updater-1.0.plist 3rd-Party support link
          [System] com.oracle.java.Java-Updater.plist 3rd-Party support link
User Launch Agents:
          [not loaded] com.bombich.ccc-user-agent.plist 3rd-Party support link
          [not loaded] com.google.keystone.agent.plist 3rd-Party support link
User Login Items:
          iTunesHelper
          Mailplane 3
          TinyGrab
          Dropbox
          TextExpander
          Skype
Internet Plug-ins:
          FlashPlayer-10.6: Version: 12.0.0.77 - SDK 10.6 3rd-Party support link
          QuickTime Plugin: Version: 7.7.3
          Flash Player: Version: 12.0.0.77 - SDK 10.6 Outdated! Update
          AdobePDFViewer: Version: 10.1.1 3rd-Party support link
          Default Browser: Version: 537 - SDK 10.9
          SharePointBrowserPlugin: Version: 14.3.9 - SDK 10.6 3rd-Party support link
          JavaAppletPlugin: Version: Java 7 Update 51 3rd-Party support link
Safari Extensions:
          1Password: Version: 4.1.0
Audio Plug-ins:
          BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
          AirPlay: Version: 2.0 - SDK 10.9
          AppleAVBAudio: Version: 203.2 - SDK 10.9
          iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
          Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
3rd Party Preference Panes:
          Flash Player 3rd-Party support link
          Java 3rd-Party support link
Old Applications:
          /Library/Application Support/Microsoft/MERP2.0
                    Microsoft Error Reporting:          Version: 2.2.9 - SDK 10.4 3rd-Party support link
                    Microsoft Ship Asserts:          Version: 1.1.4 - SDK 10.4 3rd-Party support link
          Solver:          Version: 1.0 - SDK 10.5 3rd-Party support link
                    /Applications/Microsoft Office 2011/Office/Add-Ins/Solver.app
          /Applications/Microsoft Office 2011/Office
                    Microsoft Graph:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    Microsoft Database Utility:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    Microsoft Office Reminders:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    Microsoft Upload Center:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    My Day:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    SyncServicesAgent:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    Open XML for Excel:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    Microsoft Alerts Daemon:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    Microsoft Database Daemon:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    Microsoft Chart Converter:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    Microsoft Clip Gallery:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
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                    Microsoft PowerPoint:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    Microsoft Excel:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                    Microsoft Outlook:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
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          Microsoft AutoUpdate:          Version: 2.3.6 - SDK 10.4 3rd-Party support link
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                    /Library/Application Support/Adobe/Common/dynamiclinkmediaserver/1.0/dynamiclinkmediaserver.app
Time Machine:
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          Mobile backups: OFF
          Auto backup: YES
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                    Macintosh HD: Disk size: 930.71 GB Disk used: 420.35 GB
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                    iMac backup [Local] (Last used)
                    Total size: 838.16 GB
                    Total number of backups: 21
                    Oldest backup: 2014-01-05 03:58:08 +0000
                    Last backup: 2014-04-13 19:28:15 +0000
                    Size of backup disk: Too small
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          All volumes being backed up may not be listed.
Top Processes by CPU:
               3%          iMovie
               3%          PhotoStreamAgent
               3%          iPhoto
               1%          iTunes
               1%          WindowServer
Top Processes by Memory:
          901 MB          iMovie
          688 MB          Finder
          483 MB          iPhoto
          442 MB          iTunes
          295 MB          com.apple.MediaLibraryService
Virtual Memory Information:
          99 MB          Free RAM
          3.50 GB          Active RAM
          3.42 GB          Inactive RAM
          860 MB          Wired RAM
          5.94 GB          Page-ins
          103 MB          Page-outs

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