Analyzing DV Audio - Validating Audio Data

Sony UVW-1600 through ADS Pyro A/VLINK using S-Video in/Firewire 400 out
Audio through Alesis MultiMix 8 USB mixer - 44.1 kHz output only
Just did clean install of Snow Leopard, reinstall/updates on FCP
Otherwise same configuration as before but lost original Custom AV settings and Easy Setups.
Now when I capture BetaSP material, video through the A/VLINK and audio through the Alesis, I'm getting messages I never used to get:
If I set my Capture Preset to 48 kHz audio, at close of capture I get "Analyzing DV Audio - Validating Audio Data"
If I set my Capture Preset to 44.1 kHz (matching the Alesis output), I get a long message saying the audio data rate of my captured media file doesn't match the sample rate on my source file.
From checking old captured clips, I see that I've always been capturing at 48 kHz but never got the "Analyzing DV Audio" message before. Not seeing any sync problems.
Anyone know why I'm suddenly getting this message? I don't want to capture audio through the DV stream as my source tape levels are all over the place. Thanks

Okay, I've answered my own question (I think) but could be helpful to others: in setting up my replacement (after the reinstall) Capture Preset I made a custom preset that selected "USB Audio Codec" for "Quicktime Audio Settings Device." So FCP was seeing video come in through the Firewire stream and audio through the USB stream. It evidently wanted to "validate" the rejoining of the two. I've just changed that Quicktime Audio Settings Device back to DV Audio and now I don't get the validating message. In OS X System Preferences I have "USB Codec" chosen for default audio input so FCP must be using that setting but "thinks" it's getting audio from the Firewire DV stream. I'd tried that earlier but lost audio completely during FCP capture. Now it's working. Odd...

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