On Mon, Nov 29, 2010 at 4:41 PM, <fons@xxxxxxxxxxxxxxx> wrote: > On Mon, Nov 29, 2010 at 04:33:49PM -0600, Mark Rages wrote: > >> On Mon, Nov 29, 2010 at 4:29 PM, <fons@xxxxxxxxxxxxxxx> wrote: >> > On Mon, Nov 29, 2010 at 04:09:25PM -0600, Mark Rages wrote: >> > >> >> - I have an AD1986A codec chip on my motherboard. >> >> - According to its datasheet, AD1986A supports 96 kHz sample rate. >> >> - /proc/asound/card0/codec#0 doesn't list 96 kHz. >> >> >> >> Why? >> > >> > Because: >> > >> > * A particular HW design does not have to support everything >> > a chip could do. >> > * A driver does not necessarily support all hardware features. >> >> I'm using the Alsa driver as set up by Ubuntu. Would the OSS driver >> be a better choice? > > No. To generate the analog signal to modulate an FM transmitter > for stereo you need at least 53 kHz usable bandwidth with a flat > amplitude respnse and perfect linear phase. The minimal practical > sample rate would be around 120 kHz. No audio interface I know of, > not even those work at 192 kHz, can do this. > You'd need an 'instrumentation/laboratory/scientific DA converter > for this to work at all. Right. I just want the pilot tone. You are saying the 192 kHz soundcards roll off supersonic frequencies between the DAC and the output jack? Or something else? Regards, Mark markrages@gmail -- Mark Rages, Engineer Midwest Telecine LLC markrages@xxxxxxxxxxxxxxxxxxx _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
