On Mon, Nov 29, 2010 at 4:41 PM, <fons@email-addr-hidden> wrote:
> On Mon, Nov 29, 2010 at 04:33:49PM -0600, Mark Rages wrote:
>
>> On Mon, Nov 29, 2010 at 4:29 PM, <fons@email-addr-hidden> 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@email-addr-hidden
-- Mark Rages, Engineer Midwest Telecine LLC markrages@email-addr-hidden _______________________________________________ Linux-audio-user mailing list Linux-audio-user@email-addr-hidden http://lists.linuxaudio.org/listinfo/linux-audio-userReceived on Tue Nov 30 04:15:04 2010
This archive was generated by hypermail 2.1.8 : Tue Nov 30 2010 - 04:15:04 EET