<p>Well, the simplest way is to hire a professional, but that is usually not the most affordable.</p>
<p>Depending on what recorder that you own, the most affordable would probably be to research the correct way to use it and experiment with it until you get the sound you want. Unfortunately, that way is not very simple.</p>
<p>Something between those two extremes would be to find a high school or college student who knows their way around recording gear and get them to help you. Both my local high school and community college have music tech classes that teach the use of recording equipment. If you have a nearby school that offers similar classes, try to contact the teacher and see if they can recommend anyone.</p>
<p>When recording a piano, the acoustic properties of the room in which it is recorded are very important, as is the choice and placement of the microphones. If you have something like a Zoom H2 or H4, or a Roland R-09, you should be able to get a decent recording if you can use a good instrument in a reasonably large room. </p>
<p>If you are recording in a rather small room that is either very live or very dead acoustically, it is unlikely that you are going to like what you hear on the recording. If you are using a cheap digital recorder intended for dictation purposes or some sort of iPod add-on, you are not going to get good results. If you are using a cheap microphone that came with a computer or a web camera, you are not going to get good results. Even with a good instrument, room, recorder, microphones and mic placement, it is important to set the recording levels properly. This is not rocket science, but there are a lot more ways to make a bad recording than a good one.</p>
<p>Can you describe your recording setup, including the digital recorder used, external microphones (if any), the piano used, an estimate of the size of the room in which the recording was made and a description of where you placed the microphones? I might be able to suggest some changes that would make the recording sound better.</p>
<p>(Crossposted with musmom2, this was a response to the OP's inquiry, not musmom2's response.)</p>