OK. I jumped off the deep end and started playing with VAC 4.03 this weekend. There are a lot of different settings perturbations between PowerSDR, MixW and VAC - my dummy load got a workout!
My first impression is that some of the new features, such as signal mixing (with saturation) between output port clients, volume control and PCM format conversion between cables are very cool to use. I played around with having the 16-bit, 12000 Hz sampling rate audio output of PowerSDR "up convert" to 32-bit, 48000 Hz for MixW input. It did OK on RX, but I didn't get it working well enough on TX to use it for everyday operating, but I sure can see the potential. The conversion process does degrade signal quality somewhat. VAC 4.0 now supports ASIO, DirectSound and KDM-KS along with MME audio drivers for client devices. Currently PowerSDR is only really stable with MME. Once the bugs are worked out of the KDM-KS implementation that is when VAC 4.0 should shine. You can get VAC 4.x to work with PowerSDR using MME (stable) and DirectSound (somewhat stable). PowerSDR doesn't work at all with ASIO or KDM-KS. One interesting note. I had to reduce latency (really smaller buffers) on the VAC "cables" to get things to work right which was at first a little counterintuitive. I am still having some problems on transmit with drop outs and popping during TX using 4.03 (MME & DirectSound), but not as bad as I was with 3.12, so I am counting this as an improvement, but not yet a win. I think there is still something going on in the VAC audio stream to some degree. VAC 4.03 also looks "cleaner" on the MixW waterfall that 3.12. I setup a second receiver to monitor the transmitted PSK signals and with 3.12 I was seeing 2-3 side bands on either side of the carrier (see bug report 459). I do not see them with 4.03. I am having no problem on RX with VAC 4.03. I am working on a write up of how I got 4.03 to work in MS Word and hopefully it will be done later this week. I'd appreciate anyone else's experiences with VAC 4.03 that you would like to share. -Tim --- Tim Ellison Integrated Technical Services <http://www.itsco.com/> Apex, NC USA 919.674.0044 Ext. 25 / 919.674.0045 (FAX) 919.215.6375 - cell >>> PGP public key available at all public KeyServers <<< Skype: kg4rzy -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/flexradio_flex-radio.biz/attachments/20060821/955cd307/attachment.html _______________________________________________ FlexRadio mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
