no audio from iTunes, WIN 7 PRO

Possible remedies:

• Check that you have the most recent version of iTunes (12.1.1.4 - released Feb. 18). The previous release (12.1.0.71) was widely reported to have significant playback issues, varying from "static" and stuttering to complete lack of output. The 12.1.1.4 release seems to fix most of these issues, in some cases in conjunction with the points below.
• Check the setting of Play Audio Using in Edit > Preferences > Playback (you'll have to restart iTunes for changes to take effect). iTunes 12.1 sometimes defaults this to "Windows Audio Session" rather than "Direct Sound" where (for most users) the latter works better. In some cases, the 64-bit version of 12.1.0.71 did not have the Direct Sound option available, though this was more widely reported for Windows 8.
• Check that you have the latest version of QuickTime (7.7.6) installed. Several people have encountered the problem you describe on new or re-built PCs where QuickTime had not been installed. This issue seems to affect Bluetooth audio devices though may not be exclusive to these.
• There's an alternative installer here: iTunes 12.1.1 for Windows (64-bit — for older video cards) - some users have reported that installing this has addressed the problem you've encountered. The "for older video cards" is a something a misnomer - like most prior "64-bit" releases of iTunes, this is a 32-bit application with a 64-bit installer. The "standard" 64-bit version (12.1 and 12.1.1) is a full 64-bit application, but there appear to be a small number of possible incompatibilities between these and some 64-bit Windows systems.

You're welcome - and thanks for the feedback. Are you using Bluetooth? As I said in my initial response, the absence of QT mainly seems to affect Bluetooth, but it would be useful to know that it can definitely affect other cases as well.

🙂 ... pretty much what I have here - iTunes > M-Audio Delta 24/96 soundcard > Behringer mixer > M-Audio monitors.

I remember using A&H kit ... well, rather more years ago than I care to admit to 😢