Several volumes in this French, promo-only series should be snapped up whenever they're seen. For fans of cutting-edge dance music and left-of-center indie, they serve a function similar to that of the samplers that come with CMJ magazine, providing up-to-date selections of what keen club DJs spin. The value of the average volume in the series is considerably high since many of the tracks are available on vinyl only. The 30th Trax Sampler includes Silent Poets' "Get Ready," Deetron's "Decipher Language," Chicks on Speed's "Kaltes Klares Wasser," Mental Overdrive's "Coming for Your Love," and A Reminiscent Drive's "The Unseen World." This one's very average, whether considered in or out of the context of the series.