When you create the file from SoundBooth, what are the settings for encoding? Captivate likes WAV files to be PCM encoded. Some sound applications will encode a WAV with MP3 and it gags Captivate when that happens. The fix involves either re-exporting the file using PCM encoding, or opening the file in Windows Sound Recorder and saving it back out using PCM encoding. Then importing into Captivate.
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I encountered the same error when attempting to import WAV files created in Audacity, which are "WAV (Microsoft) signed 16 bit PCM" output. I previously used an older/simpler version of Audacity with Captivate 3.0.1 with no issues, importing either WAV or MP3 files recorded in Audacity.
Captivate: version 4.0.0 (build 1596)
OS: Windows 7 (64 bit)
Sound card: Realtek High Definition Audio, driver 8/25/2009
Sound recorder: Audacity 1.3.11 (stable beta for Win7)
Output: WAV (Microsoft) signed 16 bit PCM
I researched other information related to registry/installation issues (for WinXP and Vista) and a few specific sound cards (including Realtek) - the specific fixes recommended don't seem like they would work on a Windows 7 machine... or would they?
Fix related to Vista machines with Realtek/Sigmatel sound cards, involving replacement of a .dll file.
Using a MS tool to fix a registry problem from installation (an XP fix that reportedly worked for Vista also):
Any suggestions? I've been researching this problem for 2 days...