You will want to take a look at the cheesily but aptly named album "Super Double-Bass" by Gary Karr, on First Impression Music. This is JVC XRCD24, which is about as good as CD can sound. Transcriptions for double-bass and organ.
http://www.soundstage.com/music/reviews/rev586.htm
For voice, also note "Compostela," by Ensemble Organum, on Ambroisie. The recording, done by the first-rate Musica Numeris, is easily the best recorded chant CD I have ever heard (I've heard many). Antoine Sicot is an astounding French Basso profundo.
http://www.amazon.com/exec/obidos/tg/detail/-/B0002LGW3G
http://www.soundstage.com/music/reviews/rev586.htm
For voice, also note "Compostela," by Ensemble Organum, on Ambroisie. The recording, done by the first-rate Musica Numeris, is easily the best recorded chant CD I have ever heard (I've heard many). Antoine Sicot is an astounding French Basso profundo.
http://www.amazon.com/exec/obidos/tg/detail/-/B0002LGW3G