TXT_FORUMS_PLAY_CHARTE_CHARTE_LIEE_FORUMS (TXT_FORUMS_PLAY_CHARTE_LIRE_ACCEPTER) 
TXT_FORUMS_PLAY_CHARTE_BIEN_POSTER 
TXT_FORUMS_PLAY_CHARTE_CONSULTER_MOTEUR 
TXT_FORUMS_PLAY_CHARTE_FORUM_APPROPRIE 
TXT_FORUMS_PLAY_CHARTE_CATEGORIE_PRECISE 
Do you have a question about the XXX sound card ? The best thing is to post your message into the "XXX sound card" mailing-forum . This doesn't limit the visibility of your message at all! It will be automatically seen in parent categories("Digital Sound Cards" and "informatique musicale" in this example).  
in addition, XXX sound card users who are searching for info will be pleased to see all questions about the XXX card at a glance (this is true because one can search posts by product).  
finally - and most importantly ! - members subscribed to the XXX sound card mailing-forum will receive your question by e-mail. This increases the visibility of your question, and people who use this product will see it.  
On the other hand, writing a question in "Music with Computers" when your question only concerns the XXX sound card doesn't help anyone and doesn't even increase your visibility ! 
TXT_FORUMS_PLAY_CHARTE_CHOSES_LEGALES  
TXT_FORUMS_PLAY_CHARTE_DEMANDE_MANUELS  
TXT_FORUMS_PLAY_CHARTE_EXPLICITE 
TXT_FORUMS_PLAY_CHARTE_TITRE_EXPLICITE 
TXT_FORUMS_PLAY_CHARTE_ORTOGRAPHE 
TXT_FORUMS_PLAY_CHARTE_SMS 
TXT_FORUMS_PLAY_CHARTE_MAJUSCULES 
TXT_FORUMS_PLAY_CHARTE_PUBLICITE_SAUVAGE 
TXT_FORUMS_PLAY_CHARTE_PETITES_ANNONCES 
TXT_FORUMS_PLAY_CHARTE_COURTOISIE 
TXT_FORUMS_PLAY_CHARTE_BAVARDAGE  
TXT_FORUMS_PLAY_CHARTE_PROPOS_DIFFAMANT  
TXT_FORUMS_PLAY_CHARTE_MERCI 
TXT_FORUMS_PLAY_CHARTE_MAILING_FORUMS 
TXT_FORUMS_PLAY_CHARTE_MAILING_FORUMS_DESCRIPTION  
TXT_FORUMS_PLAY_CHARTE_MAILING_FORUMS_DESCRIPTION_MEMBRES_UTILISATEURS  
TXT_FORUMS_PLAY_CHARTE_MAILING_FORUMS_DESCRIPTION_MEMBRES_SPONTANES 
TXT_FORUMS_PLAY_CHARTE_MAILING_FORUMS_HORS_SUJET

By the way, upon first post (I hope it will be only on first post and not on every one ), I get this page full of french language (I don't care as I am French), but I guess this is a little overlook that you may want to correct.