--- In [email protected], "Janne Pulkkinen" <[EMAIL PROTECTED]> wrote: > > The reason why I originally thought the problem might be in the > soundcard, is due few stories I found about E-mu soundcards working > with SDR (flexradio I think). Here's one: > > --- snip ---
Hi Janne, I read that series of messages, and I found really strange that such a high quality sound card can shift by 60 degrees one of the two channels... I would suspect a defective card. I can report my experience. I was loaned for a test the EMU-1616M Laptop Digital Audio System (an external box and a PCMCIA card), and I used it with my laptop and Winrad, using the ASIO drivers. It was really a good, very good, sound card... it was with regret that I had to return it to the guy from whom I had the loan... sampling at 192 kHz it was beautifully flat along almost all the range, and the noise also was quite low. I did not take screen captures, regretfully... what I did not do was to test it with the Windows MME drivers to check if there was any difference. Were it not for the price, I would consider it the almost ideal card for an SDR. > I should propably test with somekind of external soundcard (USB), > wouldn't it tell either the fault is in souncard or QSD? Surely. A good external USB audio adapter is the Alesis IO|2 unit. Look here : http://www.alesis.com/product.php?id=8 I own one, and must say that the flatness of the response and the background noise are similar, if not better, to those of the Delta 44. Its big cons is that it can sample only up to 48 kHz and not beyond. But, if you can find locally an USB audio adapter that you are sure performs correctly, without the dreaded "one sample delay" on one of the two channels, then you can check whether the problems you are experiencing depend on the QSD hardware or on the sound card. Good luck. 73 Alberto I2PHD
