Crackling on iRig Pro Duo with Sampletank

[aluncrewe]

I'm using Sampletank 4 on Windows 10 and just previewing the sound on the interface keyboard is producing crackling on the audio output. If I play audio files through the interface there's no problem. It just seems to occur with Sampletank 4.
I saw that another user had similar problems using a different software and the suggestion was to change the ASIO buffer size but where do I find that?

Thanks in advance. Alun

[aluncrewe]

OK, so in the meantime I've found the buffer size control in preferences and I can reduce the crackling by increasing the buffer size to 2048 samples but then I get stuttering on some of the notes and I still get some crackling. Any insight would be welcome.

[Peter_IK]

You should be able to get a much lower buffer setting with any proper audio interface. What ASIO interface are you using?

[aluncrewe]

What ASIO interface are you using?

Hi Peter,
Do you mean what hardware am I using or the software driver?

The hardware interface is an iRig Pro Duo and the driver is the standard one. I downloaded the latest I believe which is v4.8.2

Thanks, Alun