The C1 spectrum is not terribly good, but not way bad either- the disk should play without major problems, so I might assume that your player doesn't like very much the dye of that Ritek disk. To my knowlwdge best dye for audioCD's is short strategy (pthalocyanine) silver and gold dye, azo which is just fine for data disks is not liked by many audio players.
The best media for audio I have ever met (by far) are Mitsui Gold, but of course there are many others which do a decent job.
The revolution cannot be a lever, or an essay, or tablaeu, or embroidery. It cannot proceed mellowly, piece-by-piece, gently, devoutly, simply and humbly.
Mao Zedong