The simplest solution for recording your piano at home is to use an all-in-one standalone digital audio recorder. The most popular ones are:
- Edirol R-09 Pocket Digital Recorder. Review here. Latest version is Edirol R-09HR Pocket Digital Recorder. Comes with Cakewalk “pyro Audio Creator LE” wave-editing software.
- M-Audio MicroTrack II Mobile Digital Recorder. Predecessor MicroTrack reviewed here.
- Zoom H4 Handy Recorder. Review here. PW Zoom H4 ‘how-to’ here.
- Zoom H2 Handy Recorder. Review here.
- Marantz PMD620 Professional Handheld Recorder. Review here.
No mess, no fuss. Pop it on a stand, find a good location for it, and record away. Note that the M-Audio MicroTrack II does not have provision for a stand, so you will have to improvise.
For editing and simple mastering you can either use the supplied software, or else use Audacity. It’s free, has a good feature set, and you can even get free plug-ins for it, e.g., Voxengo’s MSED plug-in for doing Mid-Side decoding. Audacity is available for Mac OS X, Microsoft Windows, and Linux.