Yes, as Geoff suggested. Make sure the Vegas properties sampling rate is 44.1 or 48 kHz as that's the only rates the Mia can do.
You should try Classic Wave driver and Sound Mapper audio device modes as well in the Vegas Options> Preferences > Audio menu. Check all the Mia advanced mixer settings as well Try the 'pure wave' mode
The Echo card drivers are usually very stable.

Please fill out your system specs.

Are you running 32 bit or 64 bit Vegas?

Do you have any fx on he track you are recording to? If so, which ones?

Do you has any fx on your busses? If so, which ones?

Are using input monitoring in Vegas?

You say you have disabled any other audio hardware. What is windows using as it s default audio input and output devices?

Peter

First, thx guys for responding. I've updated my system specs.
I'm running Win 7 Home Premium 64 bit, SV Pro 10e 64 bit

Let me take your questions in order.
Latest drivers? Yes, downloaded from Echo website
ASIO Drivers selected?
I don't kno what that means. I've selected the "ASIO ECHO PCI" in audio devices tab.
Settings on Audio Device Tab:
Device Type: ASIO ECHO PCI
All selection boxes set to "Mia MIDO Virtual 1/2 Mia Midi Virtual 2"
Checked... Enable Track buffering (set to default .25 sec)
Checked... Auto detect and.....
Hanging off USB: System mouse, external HD
Recorded audio file location?
In a discrete folder (C:\mydata\audio projects\foldername)
Project audio settings?
Master bus mode: Stereo
Number of stereo busses: 1
Sample Rate: 44,100
Bit depth: 16 (the Mia card runs at 24, I believe. I've tried it both ways)
Resample quality: Best

FX on track recorded to: Generally no
FX on other tracks or busses:
Generally yes. Usually the preinstalled Sony fx's e.g. Track Compressor, Track EQ, Noise Gate, sometimes other VSTs such as Marvel GEQ, Kjaerhus Classic Limiter, perhaps others.

Input Monitoring: OFF
Windows Default input: Mia Midi Analog 1-2
Windows Default output: Mia Midi Virtual out 1-2

For rraud... some questions.
Sound Mapper - if I select that, won't it use my other sound card rather than the Mia?
Classic Wave Driver - I haven't tried that but I will.
Pure wave mode: How do I do that? I don't see it anywhere.

One last small thing... often, after a crash, I'll reboot windows. Often, but not always, I find all of my icons on the desktop rearranged.

I most certainly appreciate your help guys. I'm about out of ideas.

Harold

*** UPDATE ***
It appears that setting device type to "Windows Classic Wave Driver", (instead of the ASIO Echo PCI) my crashing problem seems to be gone. Additionally, everything seems to still be working OK.

Can't say I understand this.

I'm gonna keep experimenting.

rraud, I still don't know what the "pure wave" mode is.

Harold

For some reason the Echo ASIO causes problems in Vegas, I use 'Classic Wave' mode.

Using the 'Pure Wave' driver should not make a 'huge' sound difference but the WDM imposes lots of processing steps between your audio files and the output on your card. The 'Pure Wave' mode is "bit for bit" according to Echo.
In the Mia mixer window under Settings> Advanced> Driver> Mode
Click the WDM button to change to 'Pure Wave''
Sync Wave Devices' should be checked too. The Pure Wave mode is not available on Windows 64bit and your PCs other or integrated sound card driver should be disabled.

Pure Wave goes somewhat direct and eliminates the Windows volume control
'The WDM driver supports the Windows volume control program. When you run it (Start/Programs/Accessories/Entertainment/Volume control), you should see a slider marked “Line volume”. This is the same as the “Virtual Out” slider in the console. Adjusting the “Wave” and “Synth” sliders will set the volume levels for the Windows kernel mixer, not the hardware. These settings are not the same as the volume sliders in the console. The console sliders adjust the levels in the hardware; the Windows volume controls are for adjusting the levels in the Windows mixer."

Echo Asio v. Vegas . Maybe we (they) need a Hallsound driver ! Peter ?

geoff

rraud,
My Mia Mixer settings tab doesn't have an Advanced selection. They must have changed something. However, since you use the Classic Wave mode, I think it's good enough for me.

A question though... in Vegas preferences, after selecting Classic Wave, if I click the Advanced button, I get an Advanced Audio Config window. Among other items, it allows me to select Audio Buffers, buffer size, and priority. How do you have these set. Mine are at 4, MME, and Time Critical... respectively.

I am sooo grateful that you have solved my problem.

Harold

By having windows use the echo as its default output and usiing ASIO in Vegas, you are trying to share the audio hardware between two different drivers.

I would suggest you use the built in audio hardware for windows and the use the ASIO drivers in vegas.

Peter

The 'PureWave' option is not available in 64bit Windows, and it may be different for Vista or Win 7. I have Win XP-pro SP3 on my current audio PC and Echo driver ver. 7.3 (for XP.. Should make much of a difference anyway, providing you levels are optimized.
"How do you have these set. Mine are at 4, MME, and Time Critical"
- Same here, If it doesn't t glitch, skip, ect. leave it.
Anyway here's a Mia Mixer/Console sceneshot:
https://www.dropbox.com/s/0hshh823pkijx86/Echo%20console.jpg

Peter,
I went into the windows sound setup and selected the Realtek microphone as default recording and Realtek speakers as default output. I did NOT disable the Echo Mia options in either.

In Vegas I selected the Echo ASIO drivers.

Vegas crashed on the first attempt. Did I set something wrong or does this shoot a hold in your theory?

Harold

I finally gave up on my Echo Layla 3G (PCI) in windows 7. The driver would continually crash and I'd have to reload it to get sound. This was using ASIO mode. That plus the problems Vegas 10, 11, and 12 all have with surround projects and clipping the meters at +500 dB when there isn't even any sound on the timeline where the play head is.

Vegas crashes also seemed to be associated sometimes with sound issues.

So I put one of my Echo AudioFire 8's on firewire in my rack. Vegas seems more stable. Sound keeps working.