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Hi all
Muhsin TA1MHS (visiting) asked what happens if we try transmitting music over QMX+ CESSB... Resulting recording is attached for your entertainment.?
Remember?this is an actual transmission of SSB from a QMX+ to a QMX 80-20m with 63dB of coax inline attenuators in between. Power output is 1W PEP (leaving a little over 6dB of dynamic range on the table for when full power 5W is used). Frequency is 7030kHz with all due apologies to the QRP calling frequency (no microwatts were delivered to any antenna during this experiment).?
CESSB is switched on with the threshold set at 1W PEP. My PC played a YouTube video into the QMX+ over its USB soundcard; the other QMX is also connected to the PC and I used Audacity to record the received audio.?
Sounds pretty great!?
We actually recorded a nice video but YouTube blocked it on copyright grounds (recognizing the audio content); which is a bit weird considering we were actually?playing a YouTube video of it into QMX+, so why was that one allowed but not the recording of the re-transmission via QMX+ CESSB. Anyway.?
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Great taste in music :) Sounds great!
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A major achievement!
Transmission faithful enough that youtube was able to recognize it.
?
Original audio is apparently here:
?
Jerry
?
?
On Thu, Oct 17, 2024 at 01:01 PM, Hans Summers wrote:
We actually recorded a nice video but YouTube blocked it on copyright grounds (recognizing the audio content); which is a bit weird considering we were actually?playing a YouTube video of it into QMX+, so why was that one allowed but not the recording of the re-transmission via QMX+ CESSB. Anyway.?
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With this?level of quality is the software ready to perhaps be used at least for multi-tone digital (Olivia?8/500, MFSK32, THOR22)?? Thos moigt ropvide early field experience with the capabilities.
On Thu, Oct 17, 2024 at 4:01?PM Hans Summers via <hans.summers= [email protected]> wrote: Hi all
Muhsin TA1MHS (visiting) asked what happens if we try transmitting music over QMX+ CESSB... Resulting recording is attached for your entertainment.?
Remember?this is an actual transmission of SSB from a QMX+ to a QMX 80-20m with 63dB of coax inline attenuators in between. Power output is 1W PEP (leaving a little over 6dB of dynamic range on the table for when full power 5W is used). Frequency is 7030kHz with all due apologies to the QRP calling frequency (no microwatts were delivered to any antenna during this experiment).?
CESSB is switched on with the threshold set at 1W PEP. My PC played a YouTube video into the QMX+ over its USB soundcard; the other QMX is also connected to the PC and I used Audacity to record the received audio.?
Sounds pretty great!?
We actually recorded a nice video but YouTube blocked it on copyright grounds (recognizing the audio content); which is a bit weird considering we were actually?playing a YouTube video of it into QMX+, so why was that one allowed but not the recording of the re-transmission via QMX+ CESSB. Anyway.?
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Hans,?
Such an appropriate band...AC/DC!! Rockers from VK land!
73, Roger VA1RST
With this?level of quality is the software ready to perhaps be used at least for multi-tone digital (Olivia?8/500, MFSK32, THOR22)?? Thos moigt ropvide early field experience with the capabilities.
On Thu, Oct 17, 2024 at 4:01?PM Hans Summers via <hans.summers= [email protected]> wrote: Hi all
Muhsin TA1MHS (visiting) asked what happens if we try transmitting music over QMX+ CESSB... Resulting recording is attached for your entertainment.?
Remember?this is an actual transmission of SSB from a QMX+ to a QMX 80-20m with 63dB of coax inline attenuators in between. Power output is 1W PEP (leaving a little over 6dB of dynamic range on the table for when full power 5W is used). Frequency is 7030kHz with all due apologies to the QRP calling frequency (no microwatts were delivered to any antenna during this experiment).?
CESSB is switched on with the threshold set at 1W PEP. My PC played a YouTube video into the QMX+ over its USB soundcard; the other QMX is also connected to the PC and I used Audacity to record the received audio.?
Sounds pretty great!?
We actually recorded a nice video but YouTube blocked it on copyright grounds (recognizing the audio content); which is a bit weird considering we were actually?playing a YouTube video of it into QMX+, so why was that one allowed but not the recording of the re-transmission via QMX+ CESSB. Anyway.?
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With this?level of quality is the software ready to perhaps be used at least for multi-tone digital (Olivia?8/500, MFSK32, THOR22)?? Thos moigt ropvide early field experience with the capabilities.
At the moment no. The firmware is a major mess of cobbled together SSB and DSP experiments. I'm now working on the very last component which is reading audio from the microphone and routing it to the SSB exciter. Once I have that working I'll be in a position to roll back to 1_00_027 then cleanly apply and integrate all the experimental modules I've developed into a functional SSB/CESSB cable firmware version for release.?
73 Hans G0UPL
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I put this on a par with SpaceX catching their booster. ?We live in miraculous times.
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On Oct 17, 2024, at 16:26, Hans Summers via groups.io <hans.summers@...> wrote:
?
With this?level of quality is the software ready to perhaps be used at least for multi-tone digital (Olivia?8/500, MFSK32, THOR22)?? Thos moigt ropvide early field experience with the capabilities.
At the moment no. The firmware is a major mess of cobbled together SSB and DSP experiments. I'm now working on the very last component which is reading audio from the microphone and routing it to the SSB exciter. Once I have that working I'll be in a position to roll back to 1_00_027 then cleanly apply and integrate all the experimental modules I've developed into a functional SSB/CESSB cable firmware version for release.?
73 Hans G0UPL
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Hi Jerry
A major achievement!
Transmission faithful enough that youtube was able to recognize it.
?
Original audio is apparently here:
That wasn't the video I used but close enough :-)? ? So curious that apparently so many people can have this track on YouTube but mine was blocked globally for copyright.?
73 Hans G0UPL
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Hey you can play the SSB'd version of Highway to Hell in the background while assembling a shiny new QMX or QMX+ kit while waiting for the new firmware!
-Steve K1RF
------ Original Message ------
Date 10/17/2024 4:01:05 PM
Subject [QRPLabs] Torturing QMX+ CESSB...
Hi all
Muhsin TA1MHS (visiting) asked what happens if we try transmitting music over QMX+ CESSB... Resulting recording is attached for your entertainment.?
Remember?this is an actual transmission of SSB from a QMX+ to a QMX 80-20m with 63dB of coax inline attenuators in between. Power output is 1W PEP (leaving a little over 6dB of dynamic range on the table for when full power 5W is used). Frequency is 7030kHz with all due apologies to the QRP calling frequency (no microwatts were delivered to any antenna during this experiment).?
CESSB is switched on with the threshold set at 1W PEP. My PC played a YouTube video into the QMX+ over its USB soundcard; the other QMX is also connected to the PC and I used Audacity to record the received audio.?
Sounds pretty great!?
We actually recorded a nice video but YouTube blocked it on copyright grounds (recognizing the audio content); which is a bit weird considering we were actually?playing a YouTube video of it into QMX+, so why was that one allowed but not the recording of the re-transmission via QMX+ CESSB. Anyway.?
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Hans, did you try posting your vid using a VPN??
On Thu, Oct 17, 2024 at 3:50?PM Steven Dick, K1RF via <sbdick= [email protected]> wrote: Hey you can play the SSB'd version of Highway to Hell in the background while assembling a shiny new QMX or QMX+ kit while waiting for the new firmware!
-Steve K1RF
------ Original Message ------
Date 10/17/2024 4:01:05 PM
Subject [QRPLabs] Torturing QMX+ CESSB...
Hi all
Muhsin TA1MHS (visiting) asked what happens if we try transmitting music over QMX+ CESSB... Resulting recording is attached for your entertainment.?
Remember?this is an actual transmission of SSB from a QMX+ to a QMX 80-20m with 63dB of coax inline attenuators in between. Power output is 1W PEP (leaving a little over 6dB of dynamic range on the table for when full power 5W is used). Frequency is 7030kHz with all due apologies to the QRP calling frequency (no microwatts were delivered to any antenna during this experiment).?
CESSB is switched on with the threshold set at 1W PEP. My PC played a YouTube video into the QMX+ over its USB soundcard; the other QMX is also connected to the PC and I used Audacity to record the received audio.?
Sounds pretty great!?
We actually recorded a nice video but YouTube blocked it on copyright grounds (recognizing the audio content); which is a bit weird considering we were actually?playing a YouTube video of it into QMX+, so why was that one allowed but not the recording of the re-transmission via QMX+ CESSB. Anyway.?
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Fair enough.
As you can see I am interested in this best with?my only real issue is that I can't. use it for the more complex digital modes.
Good luck with it!
On Thu, Oct 17, 2024 at 4:26?PM Hans Summers via <hans.summers= [email protected]> wrote:
With this?level of quality is the software ready to perhaps be used at least for multi-tone digital (Olivia?8/500, MFSK32, THOR22)?? Thos moigt ropvide early field experience with the capabilities.
At the moment no. The firmware is a major mess of cobbled together SSB and DSP experiments. I'm now working on the very last component which is reading audio from the microphone and routing it to the SSB exciter. Once I have that working I'll be in a position to roll back to 1_00_027 then cleanly apply and integrate all the experimental modules I've developed into a functional SSB/CESSB cable firmware version for release.?
73 Hans G0UPL
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The difference between your video and their video is monetization.
The video that Jerry Gaffke posted is an official post by the band. The one you used likely was as well, or a post by their record label. The?label?makes a little bit of money every time somebody watches it, and then the band gets a piece of that; how much the band gets depends on how good a label contract they have.
Your?video was not put up by them, and therefore the label and the band do not make any money when somebody watches it. They don't like that. The rights holders can choose either to require that your video be taken down, or to monetize it themselves. In the latter case, they would get a bit of money every time somebody watches. They chose the takedown, perhaps in part because the audio quality is not up to the level they require. (It's excellent for what it is, but it is narrowband mono.)
The quality of the audio is excellent. It's about what I'd expect to hear from a shortwave station, minus the fading and interference; there is no blatant distortion being caused by the unusual method of modulation. (One of the pluses of CESSB is that it achieves higher average power while introducing much less distortion than typical methods like RF clipping.) It should work well both for voice and for multi-tone digital modes. It's certainly good enough to ship, though I gather that you have some software cleanup to do before it will be a finished product.
Fair enough.
As you can see I am interested in this best with?my only real issue is that I can't. use it for the more complex digital modes.
Good luck with it!
On Thu, Oct 17, 2024 at 4:26?PM Hans Summers via <hans.summers= [email protected]> wrote:
With this?level of quality is the software ready to perhaps be used at least for multi-tone digital (Olivia?8/500, MFSK32, THOR22)?? Thos moigt ropvide early field experience with the capabilities.
At the moment no. The firmware is a major mess of cobbled together SSB and DSP experiments. I'm now working on the very last component which is reading audio from the microphone and routing it to the SSB exciter. Once I have that working I'll be in a position to roll back to 1_00_027 then cleanly apply and integrate all the experimental modules I've developed into a functional SSB/CESSB cable firmware version for release.?
73 Hans G0UPL
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Amazing! Well done Hans!
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73, Rick
VE7TK
Website:
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Just amazing! One question: what are the low and high limits of the Low Frequencies frequencies modulated in this test?
73 - Pierre - FK8IH?
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Hello Pierre
It's something like the standard 300-2800 Hz ish SSB band, it's determined by the Hilbert Transform coefficients; it isn't finalized yet, I still want to adjust it to perfect it and everyone says the low frequencies should be somewhat suppressed because they add little to SSB DX intelligibility.?
On Fri, Oct 18, 2024 at 10:28?AM Pierre FK8IH via <jb.gallauziaux= [email protected]> wrote: Just amazing! One question: what are the low and high limits of the Low Frequencies frequencies modulated in this test?
73 - Pierre - FK8IH?
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Thanks Hans, very interesting and an amazing result. I guess in a near future I will add a QMX+ to my station (Hermes Lite 2, QDX Hi Band, Kanga Rooster 40M and a Bayou Jumper). SSB capacity will be usueful to use all capabilities of Fldigi.
73 - Pierre - FK8IH
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Hi Hans,
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you forgot to headbanging ..maybe the reason of blocking..... wow, I never heard ACDC on SSB
?
?
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On 18/10/2024 07:47, Hans Summers via groups.io wrote: everyone says the low frequencies should be somewhat suppressed because they add little to SSB DX intelligibility. Hans, I guess there will be a highest quality option to impress the locals? Reminds me of my first top band TX, a polyphase design that had really good audio. Mind you when I boasted about it I got "not really, the carrier suppression is poor at 25dB" from the old-timers. 73 Alan G4ZFQ
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Hans,
impressive for this tiny SSB machine. It sounds in my ears like or better than SW radio when I listened to well equipped BC stations decades before.
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I'm keen on a test by myself.
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73 Ludwig
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One tiny detail was omitted. What was fed into the audio chain was Julie Andrews singing “The Sound of Music,” alas.
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Joe AI5DD
Roger Stein
Shirley Dulcey KE1L
Rick Williams - VE7TK
Pierre - FK8IH
Randy K7RAN