High CPU with Thunderbolt Clarett interface

bassik's icon

Hello
I am running a big patch for ambisonics reproduction and I just bought a focusrite clarett 8prex interface with thunderbolt connnection.

the patch runs some vst and the hoa library for ambisonics

i have used this with an RME fire face 400 with a max of 60% cpu and with RME madiface with max 50% cpu

with the clarett I have 100% cpu

my vector size and buffer are at 512 in all cases

my laptop is
MacBook Pro 15” early 2011
16Gb ram
thinderbolt 1

i use max 7

if I run an intensive ambisonics project in reaper with the same vst and some more I have 5% cpu with 16 channels

Is it possible max 7 does not work well with this interface or any thunderbolt?
cannot find anything on the forum

Roman Thilenius's icon


the difference between max and reaper is the VST (effect, i.e. audio in and out) plug-ins.

but if the vector size is really 512 you should not see a difference between interfaces. (100% instead of 50% sounds a bit like the vectorsize would be 4 instead of 32...)

bassik's icon

Thanks for the response

vector size is 512 as well.