Problem Burning Audio CD-Rs From SD Cards

Hi,

I have an audio recorder that used SD cards, and use it to record music,
mostly classical, played by musician friends. I usually copy the SD
card's music to the HD on my PC, then burn a CD-R using my Roxio
software. The results are excellent.I use the 44.2 khz and 16 bit
requirements of CD.

However, I recently purchased a small portable battery-operated CD-R
burner, primarily for photo images. It should also work for music from
SD cards. When I burn the SD music card to CD-R with the portable unit,
the CD-R plays on my PC, but runs silently on my stereo system CD
players as well as on my 2 cars' CD players. The burner's support people
say that it is a problem of music in roots and folders, which some CD
players can't read.OK. So, then I copied the portable-burned CD-R to my
PC's HD. Next I made an audio CD-R in my PC, with my Roxio software.
Now, the resulting CD-R does play on all CD players, but, the music
sounds hollow and ragged. I am not knowingly using any equalization or
filtering. I do not know why this last method causes the music to be
hollow and ragged, nor do I know how to prevent that.

I really would like to be able to record in the field, or in someone's
house, etc., burn a CD-R with my portable burner, and then play it right
away on a normal CD player.

Any help would be gratefully received.

Thank you.

Happy New Year.

Mort Linder