I have just downloaded the iPad version of pianotech onto my iPad.
I have it installed on my Apple iMac on a desktop.
I have just bought a new audio interface for the iPad to enable me to put in through a mini mixer and then into my piano.
Before this I have run a cable from the imac to the mini mixer and then into my piano.
The audio interface is a good quality universal audio interface with 4 ins.
I have used the same setting for the pianotech on the iMac and the ipad.
The sound from the ipad is nothing like the cable sound from the iMac,and had a slight delay.
The audio interface is high quality.
Is it the fact that the ipad will not fully handle the ipad version of pianotech
My iPad Pro is brand new m1 iPad Pro with 250 g/bits of memory.
Had anyone else had this problem,or can suggest why
Thanks
Trafford Reeder

Are you sure you checked all the settings on the iPad and not just the settings for a particular preset?
In particular the Options->Devices->Audio buffer size setting is directly related to any delay you might hear.

Also check Options->Perf->Internal sample rate which may affect quality.

There might also be some issue depending on exactly how you've connected the iPad to the audio interface and the audio interface to the mixer.  For example, you talk about the audio interface having "4 ins" but you wouldn't want to be using any of the "ins" to connect the iPad to the audio interface.  You would want to do that via USB.  Then you would want to make sure that you weren't connecting a line-level output of the interface to a microphone-level input on your mixer or some other type of mismatch such as a balanced/unbalanced mixup.

I have just downloaded the iPad version of pianotech onto my iPad.
I have it installed on my Apple iMac on a desktop.
I have just bought a new audio interface for the iPad to enable me to put in through a mini mixer and then into my piano.
Before this I have run a cable from the imac to the mini mixer and then into my piano.
The audio interface is a good quality universal audio interface with 4 ins.
I have used the same setting for the pianotech on the iMac and the ipad.
The sound from the ipad is nothing like the cable sound from the iMac,and had a slight delay.
The audio interface is high quality.
Is it the fact that the ipad will not fully handle the ipad version of pianotech
My iPad Pro is brand new m1 iPad Pro with 250 g/bits of memory.
Had anyone else had this problem,or can suggest why
Thanks
Trafford Reeder

I think the situation is this. The OP is comparing the interface's stability between connecting the audio interface to the ipad and also to the mac and the statement that the OP  says that the difference in delay and audio quality between interface being linked to the ipad pro and then to the imac separately, there's delay and change in audio quality.

If I'm correct in this analysis, there are a few factors I need to be aware of before I comment further.
1: Please state the make and model of the audio interface - UA make a number of audio interfaces and some may work with ipads, others not.
2: Are you running the latest iPad OS version?
3: How are you interfacing between your ipad pro, audio interface and any master controllers in use? (are you using a hub? if so, make and model please?)

with the above answers, I can find the problem for you.

Sometimes certain hubs aren't exactly friendly with certain audio interfaces, sometimes, certain hubs don't supply enough power across the interface chain, some audio interfaces as I've said earlier don't exactly like working with ipads, mainly due to audio support, etc.

lew

See: https://www.macobserver.com/tips/quick-...input-mac/

Try the ipad with no mac connected in any way.