I have a high pitched "cricket like" sound on all playback - old and new. Any help is greatly appreciated.

Think you'll need to give much more information to the forum before anyone could help. Otherwise, my only suggestion is: Check your monitors for crickets?

Playback of what? How do you have the Fireface set up? 

I've been happily recording and listening for years. Today I imported an mp3 to put some sax over. While listening to the song I hear this high pitched chirp. It happens intermittently. 4 chirps then nothing then 6 chirps. I loaded a recent recording and the playback chirped. Recorded some vocals over a dub. playback chirped.

Any chance you might be using a demo version of a plugin or codec?
One of those could be a possible source of the "chirps"...

do you have a mic plugged in that's catching feed back from a monitor ?

I only say that because ive done it :)

I too think it might be an unregistered plug in.
 
If you export the project, does the chirping get exported too?

Yea, its 100%,  an unregistered plugin or a plugin running in Demo mode
 
CJ

I haven't downloaded any plug-ins that I know of. How do I get rid of it? Also, why did it just start happening yesterday?
 
Please forgive my lack of tech savvy. I play, and I listen.
 
Thanks - Russ