Heavy Distortion and -6085 error !?

[robbie123]

''The audio device buffer underflowed. If this occurs frequently try decreasing the H/W Buffer Size in the playback engine panel or remove other devices from the audio firewire bus.-(-6085)''

when I do a recording for about 5 to 10 minutes, pro tools gives me this error and when I listen to the playback it is heavily clipped and distorted, I know its not because my record level is to high because sometimes its fine and not clipped.
I also dont have any firewire devices so I dont know why the error says that.

could anyone please help me out because im starting to get a bit frustrated.
thanks.

Windows 7
HP ProBook 4520s laptop
Pro Tools LE 8.0.5
MBox 2


SiSoftware Sandra

ID
Host Name : Rob
Workgroup : WORKGROUP

Computer
Model : HP ProBook 4520s 103C_5336AN
Serial Number : 2CE02802QB
Chassis : HP Notebook
Mainboard : HP 1413
Serial Number : 2CE02802QB
BIOS : HP 68AZZ Ver. F.07 06/08/2010
Intel vPro : 6.00.03.1195
Total Memory : 2.86GB DDR3 SO-DIMM

Processors
Processor : Intel(R) Core(TM) i3 CPU M 330 @ 2.13GHz (2C 4T 2.13GHz/2.13GHz, 1.73GHz IMC, 2x 256kB L2, 3MB L3)

Chipset
Memory Controller : HP Core (Arrandale) Mobile DRAM Controller 133MHz FSB, 2x 1.5GB DDR3 SO-DIMM 2x 532MHz (1GHz), Integrated Graphics

Memory Module(s)
Memory Module : Samsung M471B2873FHS-CH9 1GB DDR3 SO-DIMM PC3-10700S DDR3-1334 (9-9-9-25 4-34-10-5)
Memory Module : Samsung M471B5673EH1-CH9 2GB DDR3 SO-DIMM PC3-10700S DDR3-1334 (9-9-9-25 4-34-10-5)

Video System
Video Adapter : Intel(R) HD Graphics (12 SM4.0 667MHz Turbo, 66MB DDR3 1GHz 128-bit, Integrated Graphics)

Graphics Processor

Storage Devices
Hitachi HTS725025A9A364 (250GB, SATA300, 2.5", 7200rpm, 15MB Cache) : 233GB (C:) (F:)
hp CDDVDW TS-L633N (SATA150, DVD+-RW, CD-RW, 2MB Cache) : N/A (G:)

Logical Storage Devices
SYSTEM : 300MB (NTFS)
Hard Disk (C:) : 216GB (NTFS) @ Hitachi HTS725025A9A364 (250GB, SATA300, 2.5", 7200rpm, 15MB Cache)
HP_RECOVERY : 15GB (NTFS)
HP_TOOLS (F:) : 2GB (FAT32) @ Hitachi HTS725025A9A364 (250GB, SATA300, 2.5", 7200rpm, 15MB Cache)
Optical Drive (G:) : N/A @ hp CDDVDW TS-L633N (SATA150, DVD+-RW, CD-RW, 2MB Cache)

Peripherals
LPC Hub Controller 1 : HP HM57 LPC Interface Controller
LPC Legacy Controller 1 : SMSC FDC37B72x
Audio Device : HP P55/PM55/3400 High Definition Audio
Disk Controller : HP P55/PM55/3400 6 port SATA AHCI Controller
USB Controller 1 : HP P55/PM55/3400 USB2 Enhanced Host Controller
USB Controller 2 : HP P55/PM55/3400 USB2 Enhanced Host Controller
SMBus/i2c Controller 1 : Intel ICH SMBus

Printers and Faxes
Printer : PDF Complete Converter (2400x2400, Colour)
Printer : Microsoft XPS Document Writer (600x600, Colour)
Fax : Microsoft Shared Fax Driver (200x200)

Network Services
Wireless Adapter : Atheros AR9285 802.11b/g/n WiFi Adapter (802.11n (HT), 65Mbps)

Power Management
Battery No 1 : Hewlett-Packard Primary 47.52Wh/3.82Ah

Operating System
Windows System : Microsoft Windows 7 Home 6.01.7600
Platform Compliance : x86

Windows Experience Index
Current System : 4.4

[albee1952]

With Windows 7, you need to be running 8.0.5

[robbie123]

im allready running on 8.0.5

[albee1952]

DOH, thought your signature showed only 8 (maybe i need those new glasses). You can find some info by googling pro tools 6085, but if that doesn't turn up something quick, a Sandra report is needed before anyone can offer much advice beyond one common(okay, 2) newbie goofs. #1 is neglecting to perform the required system tweaks(like disable wifi, bluetooth and turn OFF the USB power management feature) and #2 is recording to the C: drive(or a partition of it). Since you have Windows 7, then your recording drive should be USB2/3 or eSATA(NOT firewire) or a second internal drive(if your laptop can accept one). Any recording drive needs to be 7200 rpm or faster(avoid "green" drives).

Help us Help You - READ THIS Before Posting!

[robbie123]

could you tell me what a sandra report is ?

tnks

[zedhed]

Originally Posted by robbie123

could you tell me what a sandra report is ?

tnks

This should help; http://duc.avid.com/showthread.php?t...ghlight=benoni