> >Alberto does not have any EMU products but I have two. I own the 1820m and also >the 1616m. Both work extremely well with ASIO and winrad but the EMU setup was >not easy. I understand that Creative/Emu have made some changes to their cheaper >products. Mine, for example, do not need any sample delay. Which reminds me, >sample delay is not ever needed for ASIO; it is only needed for WMME. Another >thing we have heard about Emu is that they are using ASIO channel assignments >other than #1 and #2 for their new cheaper products so it is likely that this >is what you are experiencing. Alberto will be adding full ASIO channel >selection in the next release so that will take care of that problem. > > >It is not a problem of the DLL support that the channel skew calibration only >works perfectly at one offset frequency. This is a true statement about the >softrock, the Flex1000, and all soundcards no matter now good they are. The >calibration of this is supposedly done by "Rocky" software but I have never been >able to see it work properly. Linrad also can be calibrated using a pulse source >applied to the receiver inputs. Linrad will typically create an image rejection >of around 60dB across the entire displayed band. When manually adjusting the >calibration controls in Winrad while using the better Emu cards, I see a spot >image rejection of 115dB and it is still better than 60dB over a modest offset >range. The full band calibration will be incorporated into a future version of >Winrad but it is obviously dependent on the hardware so Alberto is waiting for >me to design that. > >73, > >Jeffrey Pawlan WA6KBL >
Jeffrey, I have to disagree with you. I've been now playing with my E-MU 0404 over two years and what I've noticed and am quite sure about is that you really need the delay, also for ASIO. Actually, I can swap from WME to ASIO by chanching the profile from my patchmix and the image rejection stays the same (good, at least -60db). So there isn't any change in delay either I'm using WME or ASIO. I must say that I feel pretty comfortable with the patchmix. Oh, you probably misunderstood (sorry, my bad way expressing myself) the channel kew calibration - frequency depency. I was talking about a reception frequency. I have really nice image rejection on the lower bands (80m, 40m) but when going higher I have to recalibrate the phase and gain offsets. This is due my IQ detector desing. I think quite many tayloe or other IQ detectors have this same phenomen. 73 de Janne, OH1GTF _______________________________________________ Winrad mailing list [email protected] http://winrad.org/mailman/listinfo/winrad_winrad.org
