Hello and thank you for your question. Did you mix down to a Master Track on these songs. If not, that is the problem. The CD can only burn Master Tracks. Detailed instructions on doing this can be found starting on page 69 of the owner's manual.I hope that helps. Please let me know if that turns out not to be the issue.
Did you set the OUT point? The mixdown will create song that starts from 00:00:00:00 and ends mat whatever Out point you set. So you need to set the OUT point before you press the MIXDOWN/MASTER button.To set the out point, go to the end of the song you want to master. Now hold down the LOCATE buton and press the OUT button. That will set the Out point to the song's current transport location
Technically that is a different question from your original posting, and should be posted as a separate question on the site. Since it is somewhat related, I'll give you a brief answer. But in the future, only follow-ups directly related to the original question should be posted within the original conversation. Those are the rules of the site.When you mix down to a master track, the Tascam will create a stereo track based on the current position of the track controls. So if the track or master faders are turned down, then the recording will have low volume. Make sure you have the master fader up as high as you can go without clipping. Don't use the master fader to set your personal listening volume. It is used to set the recording level. For listening, use the monitor section and control the listening volume from that..
You can also use the Tascam's compressor settings to get a fuller sound as described in this article.