Mat, Ralph and Beagle,

Thanks for getting back to me.

I have tried Ralph’s suggestion to boost the priority of BIAB.
Sorry to say that there was no effect, so I am now leaning towards Mat’s suggestion of the limitation on polyphony within the SD-50.

The strange thing is that in the arrangement, I first noticed these problems of track’s volumes dropping out is mainly on the REAL Drums track, which should be audio and hence not a great load on the SD-50.

1) Any other suggestions?
2) Are there other Sound Canvas units with greater polyphony?

Brgds,
Tonnie
PS Will download the DPC Latency Checker