My Bad!
After listening to the MP3 files I'd posted, I realized something was amiss. The files were converted at the lowest possible bit rate, rather than the highest. This whole project is a friggin' learning experience for me in the worst possible way. Anyhow, I reconverted and re-upped all the tracks this evening, so they should sound a bit better. Nothing to be done about the out of tune notes, unfortunately. The links in all the original posts should work for the re-upped files from this point onward. All the tracks can be accessed on one page by clicking below. Marcello Sonatas