(Assuming 192kbps)

30gB * 8gb/1gB * 1024mb/1gb * 1024kb/1mb * 1s/192kb == 1310720s (364h, 5m, 20s) of music

32b/1 sample * 44100 samples/1s * 1310720s * 1gb/(1024^3)b * 1gB/8gb == 215.33gB of wav files

FLACs compress WAV files by about a quarter to a third, so:

215.33gB wav * 2gB flac/3gB wav == 143.5 gB FLAC

143.5 gB FLAC * 1 DVD/4.7gB == 30.5 FLAC DVDs
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Bitt Faulk