Yes it is.
Yes it is. Mac users can use SnapMusic Studio 715 with Garage Band or Sound Studio.
Yes it does.
Yes, it will record from any source with the correct connection/output.
Yes, you can record it and save it as MP3 directly. No extra editing/converting is necessary.
If you need to mix the microphone and other input source and record together, you have to connect your microphone and your other input source to SnapMusic Studio 715. However, if you need to use the built in microphone, you can record it first and save it as a track and record other input source as another track and mix them together using your editing software.
When SnapMusic Studio 715 is connected it will usually override your PC sound card. Sometimes, a PC will not recognise an external source. You can only use one sound card at any given time; therefore you will need to disable your PC sound card. Disabling/re-enabling is simply done via a couple of clicks on sound and audio properties in the control panel.
Yes, the software will automatically separate the songs.
As long as there is a line level output on the device.
It is powered solely from the USB port. No external power supply is necessary.
No it does not.
Usually a line out if available. If there is no line out, you can connect to the earphone socket. You need to get a Twin Phono to 3.5mm Stereo Jack lead.