I have seen the same thing with Writelog - turning VAC off and back on in PowerSDR gets rid of the problem.
I haven't tried trouble shooting this further but wonder if its because of a mismatch in sampling rates between PSDR and the program on the other end of the VAC? Stu K6TU -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of kd0...@gmail.com Sent: Tuesday, July 05, 2011 8:44 AM To: flexradio@flex-radio.biz Subject: [Flexradio] Voice keyer through PSDR truncates end of audio on output, progressive worsening Hi, I originally posted a version of this to N1MM's reflector, but further troubleshooting points to PowerSDR so I'll continue my quest here. Environment: Windows 7 64bit N1MM Logger V11.6.4 FlexRadio Flex-3000 with PowerSDR 2.0.22 Playback occurs over Virtual Audio Cables (VAC) 4.10.0.2537 I want to feed the output of N1MM's voice keyer to PSDR for contesting, and it works great, at first. The problem is that something is cutting off my recorded wavs about 100ms early and getting progressively worse as I run it. My problem can be duplicated as follows, assuming a regular contest setup for voice on N1MM (using the IARU coming up next weekend currently) 1. Record to N1MM's voice keyer via shift+ctrl+F1-F12 several wav messages 2. Play them as I would in a contest several times, listening to the playback through MOX. The first few times, playback is good. 3. After 5-6 playbacks, they start to get truncated at the end more and more, and a delay starts to get introduced toward the beginning of playback. Eventually the audio is not even playing the final second or two of the message, and there's a silence of around 50% of the end truncation length at the beginning. I've tried ruling out VAC as the source of the trouble using its "audio repeater" utility. When directing the output of N1MM into the same VAC line and connecting that line to a headset output on the repeater, I do not experience the problem. Further, possibly unrelated, observations: 1. When I direct the audio output direct to headphones instead of VAC, the delay does not happen either 2. I have tried different sample rates, 44k and 48k. While switching sample rate "resets" the problem (probably N1MM resetting the audio system), it then proceeds to degrade as time goes forward as before. I now suspect that sample rates are a factor, but when they are all set to the same thing on N1MM and PowerSDR it seems it should be OK. VAC appears to handle a wide range of sample rates automatically so I don't know that it would be the factor. 3. I have verified that the wavs play back perfectly outside of n1mm, and also have tried recording wavs with audacity, it seems that ANY wav will exhibit this behavior whatever its source, but the wav files are of good quality and not truncated or corrupt. Thanks for any help. 73, AI1P _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
