Thanks a lot for you quick and really clear response, I understand a lot more now, but the problem doesn't seems to solve, > They also have a "Master" volume that the driver sets to be in 100% > (but some apps and pulseaudio might reduce it to 0%, causing the device > to be muted). > > Anyway, the AC97 Kernel support will expose all lines reported by the > hardware via an ALSA mixer. > > The AV 350 entry assumes that the "line in" mixer entry is the one > containing the audio. So, it will place the volume for such line > in 100%. > > However, maybe, on your device, some other input was used instead. > > If this is the case, all you need to do is to open a mixer, unmute > the right line and manually increase the volume. I tried, but to be honest, since I'm using linux, (about 6 years ago) I have noticed my lack of understanding in 2 things under this OS... One is the networking and dhcp stuff, and the other is the sound ^^ So I tried to do what you asked as precisely as I could be maybe I do something wrong :'( so went to alsamixer and tried to put everything at its maximum and unmuted everything. I even did this with thing unrelated to be sure! and I did this under pulsemixer too, but still nothing! I tried to look a bit on the net to see if something was missing. but I don't really know what to look for in the mean time! I saw a lot of peole asking to output command like `aplay -L` and `amixer`, so here I give them to you if you can notice somethign (I put them on paste.rs because I think it's way to messy for a mail but if you want me to paste them in mail next time, there is no problem ^^) - aplay -L : https://paste.rs/MYb - amixer : https://paste.rs/PaY > There's a separate issue that might explain why some people > are using a different card: some boards require a command to > enable some pins (called GPIO). Those are used, among other > things, to enable/disable some external chips. In the case of > the original AV 350 that was used to add support for it, > it used some of those GPIOs to enable the AC97 inputs. > If your AV 350 requires a different setting, that will require > to patch the Kernel, but it is more likely that the problem on > your device is just due to a different AC97 volume. This is really helpful, again Thank you very much for you help ! PS: this device is still in use by my dad from time to time which is under windows and it actually work really well under Windows (now that I think about it, I only tried it with MAGIX software) Anthony.