Call Recorder not using microphone to record the other side Any Call Recorders that are digital - not using my microphone to listen to what is said in the other end?

What about recording calls over Bluetooth?

(It seems most most of these applications record what goes into my microphone, and listen to the other side through my microphone, often turning up the speaker to do that)
This is something that has to be enabled in the kernel. Some custom kernels do implement this, depending on your device.