In article .com,
wrote:
Hello all!

I am building a test platform that needs to record voice at 8khz sample
rate. This application is used in telephony networks. I am using the
ASIO API to get the voice samples from a sound card.

I tried using the Sound Blaster Audigy and X-Fi sound cards, but those
boards do not support sampling of voice at 8Khz when using ASIO (I
guess lower sample rates are obsolete nowadays..). I also tried using
the ASIO4ALL driver which works at 8khz, but this introduces too much
latency (delay).

Anyone knows if there is a PCI or PCMCIA sound card out there that
supports native 8Khz rate sampling over ASIO?

I assume you also need 8-bit non-linear encoding as well?

The easiest thing to do is record at a high rate, then downsample.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."