Re: [Flexradio] SSB audio question
It was really a combination of the echo and recognising your call from this venue. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ab7r Sent: Sunday, December 11, 2005 2:55 PM To: Flexradio@flex-radio.biz Subject: [Flexradio] SSB audio question Not sure if this has been addressed, but probably has. Was spending some time in the 10M contest and worke W5SXD (Hi Rich). He knew right off the bat I was running an SDR1K cuz of an echo in the audio. I have also had other remark about a slight echo. Any idea what causes this and if it can be eliminated? Other than that, SDR1K played well using N3FPJ software and 1KW amp. Originally was getting lock up problems, but moved my USB port around and added some ferrite beads and eliminated the problem. 73 Greg AB7R ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] SSB audio question
It has been my experience with a slower computer that the buffer size will effect the transmit echo. Try lowering it and see what reports you get, I needed to use the lowest setting. 73 Hank - K9LZJ Hank Wolfla Lyman H. Wolfla II, Inc. 1308 S. Peace St. Greenfield, IN 46140 [EMAIL PROTECTED] 317-861-0186 Cell: 317-448-3457 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of richard allen Sent: Wednesday, December 14, 2005 4:46 AM To: 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It was really a combination of the echo and recognising your call from this venue. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ab7r Sent: Sunday, December 11, 2005 2:55 PM To: Flexradio@flex-radio.biz Subject: [Flexradio] SSB audio question Not sure if this has been addressed, but probably has. Was spending some time in the 10M contest and worke W5SXD (Hi Rich). He knew right off the bat I was running an SDR1K cuz of an echo in the audio. I have also had other remark about a slight echo. Any idea what causes this and if it can be eliminated? Other than that, SDR1K played well using N3FPJ software and 1KW amp. Originally was getting lock up problems, but moved my USB port around and added some ferrite beads and eliminated the problem. 73 Greg AB7R ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] SSB audio question
There seems to me that there is a common theme floating around here concerning the buffer settings for optimal use. Since there also seems to be answers that are all over the spectrum (which is understandable due to the variables involved), maybe a more scientific approach is required Maybe what we need to do is collect some data from the users on the reflector on the processor used vs. buffer settings categorized by sound card. Plot the data with the processor/speed data on the X axis and the buffer settings data on the Y axis. Hopefully there will be some sort of correlation and the graph will have some sort of linearity. If it works, a nice little graphical representation could be useful for new users setting initial buffer setting values and experienced users to tweak their systems. I'd be willing to collect the data if enough people are interested. Just send it to me off-list I need the following data: 1.) Processor family/type and speed 2.) Type of sound card used 3.) DMA buffer size (Delta 44) 4.) Sound Card buffer size 5.) DSP buffer size 6.) VAC buffer size (if applicable) -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lyman H. Wolfla II Sent: Wednesday, December 14, 2005 7:52 AM To: 'richard allen'; 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It has been my experience with a slower computer that the buffer size will effect the transmit echo. Try lowering it and see what reports you get, I needed to use the lowest setting. 73 Hank - K9LZJ Hank Wolfla Lyman H. Wolfla II, Inc. 1308 S. Peace St. Greenfield, IN 46140 [EMAIL PROTECTED] 317-861-0186 Cell: 317-448-3457 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of richard allen Sent: Wednesday, December 14, 2005 4:46 AM To: 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It was really a combination of the echo and recognising your call from this venue. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ab7r Sent: Sunday, December 11, 2005 2:55 PM To: Flexradio@flex-radio.biz Subject: [Flexradio] SSB audio question Not sure if this has been addressed, but probably has. Was spending some time in the 10M contest and worke W5SXD (Hi Rich). He knew right off the bat I was running an SDR1K cuz of an echo in the audio. I have also had other remark about a slight echo. Any idea what causes this and if it can be eliminated? Other than that, SDR1K played well using N3FPJ software and 1KW amp. Originally was getting lock up problems, but moved my USB port around and added some ferrite beads and eliminated the problem. 73 Greg AB7R ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] SSB audio question
I like this approach and would appreciate being able to see some data like this. However, I'd like to throw in my 2 cents here. An even bigger issue than having just a 1GHz processor is: What processes are running at the same time as the PowerSDR software? We have seen instances where two people running similar specced computers (same CPU speed, same amount of ram, same OS, etc) got very different PowerSDR results because of what OTHER software was loaded and running on the machine. If you have other sources competing for the CPU, you may experience artifacts that wouldn't otherwise be there. I'll leave the issue of what to remove and what is necessary to someone else to decide, but it is a good idea to know what processes are running on your computer. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Wednesday, December 14, 2005 7:53 AM To: Lyman H. Wolfla II; richard allen; ab7r; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question There seems to me that there is a common theme floating around here concerning the buffer settings for optimal use. Since there also seems to be answers that are all over the spectrum (which is understandable due to the variables involved), maybe a more scientific approach is required Maybe what we need to do is collect some data from the users on the reflector on the processor used vs. buffer settings categorized by sound card. Plot the data with the processor/speed data on the X axis and the buffer settings data on the Y axis. Hopefully there will be some sort of correlation and the graph will have some sort of linearity. If it works, a nice little graphical representation could be useful for new users setting initial buffer setting values and experienced users to tweak their systems. I'd be willing to collect the data if enough people are interested. Just send it to me off-list I need the following data: 1.) Processor family/type and speed 2.) Type of sound card used 3.) DMA buffer size (Delta 44) 4.) Sound Card buffer size 5.) DSP buffer size 6.) VAC buffer size (if applicable) -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lyman H. Wolfla II Sent: Wednesday, December 14, 2005 7:52 AM To: 'richard allen'; 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It has been my experience with a slower computer that the buffer size will effect the transmit echo. Try lowering it and see what reports you get, I needed to use the lowest setting. 73 Hank - K9LZJ Hank Wolfla Lyman H. Wolfla II, Inc. 1308 S. Peace St. Greenfield, IN 46140 [EMAIL PROTECTED] 317-861-0186 Cell: 317-448-3457 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of richard allen Sent: Wednesday, December 14, 2005 4:46 AM To: 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It was really a combination of the echo and recognising your call from this venue. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ab7r Sent: Sunday, December 11, 2005 2:55 PM To: Flexradio@flex-radio.biz Subject: [Flexradio] SSB audio question Not sure if this has been addressed, but probably has. Was spending some time in the 10M contest and worke W5SXD (Hi Rich). He knew right off the bat I was running an SDR1K cuz of an echo in the audio. I have also had other remark about a slight echo. Any idea what causes this and if it can be eliminated? Other than that, SDR1K played well using N3FPJ software and 1KW amp. Originally was getting lock up problems, but moved my USB port around and added some ferrite beads and eliminated the problem. 73 Greg AB7R ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] SSB audio question
I like this approach and would appreciate being able to see some data like this. However, I'd like to throw in my 2 cents here. An even bigger issue than having just a 1GHz processor is: What processes are running at the same time as the PowerSDR software? We have seen instances where two people running similar specced computers (same CPU speed, same amount of ram, same OS, etc) got very different PowerSDR results because of what OTHER software was loaded and running on the machine. If you have other sources competing for the CPU, you may experience artifacts that wouldn't otherwise be there. I'll leave the issue of what to remove and what is necessary to someone else to decide, but it is a good idea to know what processes are running on your computer. Eric Wachsmann FlexRadio Systems In particular, do you have any of those distributed computing applications (e.g. [EMAIL PROTECTED] or equivalent)? These things all run at low priority, but they still run. It costs something to get them out of the way. They also tend to kill the cache. Since the PowerSDR basic digital signal processing loop is real time or near real time processing (as real time as the MS' OS allows at any rate), extra stuff, no matter how low priority it is, can make a difference. I know I run some of that stuff, I have for years in competitive teams, but you really have to remember to shut it off when you're serious about SDR performance, especially audio without dropouts. Certainly, when running CW and trying to work rare DX, I just don't want or need that stuff to be in the way. Larry WO0Z
Re: [Flexradio] SSB audio question
Hi all, If the chosen buffer size of the Audio and DSP setup influences the audio quality of SSB transmissions as reported by Hank, I propose to make the buffer sizes separate and selectible for reception and transmission. One buffer size may be optimal for cw and digital mo-des while an other one is best for SSB. Preferably the Power SDR program switches automatically to the predefined buffer sizes which the operator has assign-ed to different modes. Best 73 Willi - Original Message - From: Eric Wachsmann - FlexRadio [EMAIL PROTECTED] To: 'Tim Ellison' [EMAIL PROTECTED]; 'Lyman H. Wolfla II' [EMAIL PROTECTED]; 'richard allen' [EMAIL PROTECTED]; 'ab7r' [EMAIL PROTECTED]; Flexradio@flex-radio.biz Sent: Wednesday, December 14, 2005 5:09 PM Subject: Re: [Flexradio] SSB audio question I like this approach and would appreciate being able to see some data like this. However, I'd like to throw in my 2 cents here. An even bigger issue than having just a 1GHz processor is: What processes are running at the same time as the PowerSDR software? We have seen instances where two people running similar specced computers (same CPU speed, same amount of ram, same OS, etc) got very different PowerSDR results because of what OTHER software was loaded and running on the machine. If you have other sources competing for the CPU, you may experience artifacts that wouldn't otherwise be there. I'll leave the issue of what to remove and what is necessary to someone else to decide, but it is a good idea to know what processes are running on your computer. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Wednesday, December 14, 2005 7:53 AM To: Lyman H. Wolfla II; richard allen; ab7r; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question There seems to me that there is a common theme floating around here concerning the buffer settings for optimal use. Since there also seems to be answers that are all over the spectrum (which is understandable due to the variables involved), maybe a more scientific approach is required Maybe what we need to do is collect some data from the users on the reflector on the processor used vs. buffer settings categorized by sound card. Plot the data with the processor/speed data on the X axis and the buffer settings data on the Y axis. Hopefully there will be some sort of correlation and the graph will have some sort of linearity. If it works, a nice little graphical representation could be useful for new users setting initial buffer setting values and experienced users to tweak their systems. I'd be willing to collect the data if enough people are interested. Just send it to me off-list I need the following data: 1.) Processor family/type and speed 2.) Type of sound card used 3.) DMA buffer size (Delta 44) 4.) Sound Card buffer size 5.) DSP buffer size 6.) VAC buffer size (if applicable) -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lyman H. Wolfla II Sent: Wednesday, December 14, 2005 7:52 AM To: 'richard allen'; 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It has been my experience with a slower computer that the buffer size will effect the transmit echo. Try lowering it and see what reports you get, I needed to use the lowest setting. 73 Hank - K9LZJ Hank Wolfla Lyman H. Wolfla II, Inc. 1308 S. Peace St. Greenfield, IN 46140 [EMAIL PROTECTED] 317-861-0186 Cell: 317-448-3457 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of richard allen Sent: Wednesday, December 14, 2005 4:46 AM To: 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It was really a combination of the echo and recognising your call from this venue. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ab7r Sent: Sunday, December 11, 2005 2:55 PM To: Flexradio@flex-radio.biz Subject: [Flexradio] SSB audio question Not sure if this has been addressed, but probably has. Was spending some time in the 10M contest and worke W5SXD (Hi Rich). He knew right off the bat I was running an SDR1K cuz of an echo in the audio. I have also had other remark about a slight echo. Any idea what causes this and if it can be eliminated? Other than that, SDR1K played well using N3FPJ software and 1KW amp. Originally was getting lock up problems, but moved my USB port around and added some ferrite beads and eliminated the problem. 73 Greg AB7R ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex
