[slave-libav]: based on libav-1.1, formats: mp3, wav, ogg, flac, ape, mpg, mpeg, mpc, aac, mp2, wma, wmv, wv, asf, rm
  [slave-xmp]: based on libxmp-4.3.3, formats: mod, med, xm, it, s3m, dbm, psm, umx, okt, digi, 669, mtm, mtp, ac1d, di, eu, kris, lax, liq, dtm, ptm, rtm, stm, amf, dmf, imf, amd, rad, hsc
  [slave-fc14]: based on libfc14audiodecoder-1.0.3, formats: fc, fc13, fc14
  [slave-gme]: based on gme-0.6.0, formats: ay, gbs, gym, hes, kss, nsf, nsfe, sap, spc, vgm
  [slave-asap]: based on asap-3.2.0, formats: sap, cm3, cmc, cmr, cms, dmc, dlt, mpd, mpt, rmt, tm2, tm8, tmc, fc
  [slave-sc68]: based on sc68-2.2.1, formats: sc68, sndh
  [slave-sid2]: based on sidplay-libs-2.1.1, formats: sid, psid, info
  [slave-mdx]: external: mdxplay, formats: mdx, pdx
  [slave-timi]: based on libwildmidi-0.4.0, formats: mid, xmi
  [slave-uade2]: external, formats: adsc, abk, ac1d, ahx, alp, amc, aon, aon8, ast, avp, bp, bp3, bpsm, bd, bds, bss, chan, cin, cm, core, cust, cus, dat, dh, di, dl, dlm1, dlm2, dln, dm1, dm2, dns, doda, dsc, dsr, dum, dmu, dss, dw, dz, ea, ems, emsv6, eu, ex, fc, fc13, fc14, fc3, fc4, fcm, fp, fred, fw, glue, gray, hd, hip, hip7, hipc, hn, ims, is, is20, jam, jcb, jcbo, jd, jmf, jo, jpn, jpnd, jpo, jpold, kh, kris, ksm, lax, ma, mc, mcmd, mco, mcr, mcs, md, mdat, mdst, mii, midi, mk2, mkii, ml, mmdc, mok, mon, mso, mtp2, mug, mug2, mw, pap, pc, psa, psf, pt, puma, pvp, qpa, qts, rh, rk, s, s7g, sa, sc, sct, scumm, sdata, sfx, sfx13, sid1, sid2, sidmon, sjs, sm, smus, sng, snx, soc, sog, sonic, spl, sqt, src, sun, syn, synmod, tf, tfmx, tfx, thm, thx, tiny, tme, tronic, uds, unic, vss, wb, ym