hodge.
1. YOUR R24. AN IDEA.
apparently it CAN BE USED AS A 8 into 2 96khz recording interface from the manual. correct ?
possibly thats inconsistent with cb settings and/or biab settings and/or win 7.
if r24 set to 96k , IS IT ? if so change it to 44.1. 16 bit.
2. try this.
set r24 AND CBASE AND WINDOWS SETTINGS TO MATCH BIAB 16 bit 44.1K.

IF ABOVE FAILS. THEN
the only solution is to post the following PICS (enlarged cos some mate, like myself have vision probs.)
a. win 7 recording/playback sound device settings. includeing advanced.
b. biab audio driver settings.
c. cbase settings sampling rate and bit depth.
d. zoom sampling rate /bit depth settings .
SO 4 PICS PLEASE MATE.
tis only way to nail the probs down.
best.
muso who loves the who lol.

my songs....mixed for good earbuds...(fyi..my vocs on all songs..)
https://soundcloud.com/alfsongs
(90 songs created useing bb/rb.)