K3 DVR question
Locked
 
|
I am using the K3 DVR to record the received audio and play it back to the OM on the other side
to give him an impression of his audio. Usually third party listeners told me that the recorded audio sounded nearly equal to the original, but last week I recorded a ham friend very close to me and the replay sounded a little distorted when I retransmitted it. It sounded very good in my monitor though. I have seen that the ALC meter was quite high when I replayed the recorded audio, and it could not be influenced by my mic gain and comp setting. Is this normal and intended? 73! de Werner OE9FWV -- Meine Frau ist mit meinem Hund abgehauen. Ich vermisse ihn sehr... Email powered by Pegasus Mail free at <http://www.pmail.com> Homepage: <http://www.qsl.net/oe9fwv/> Fone +43 5522 75013 Fax +43 5522 22505 Mobile +43 664 6340014 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
I have sent the following question to the list some time ago, but did not see an answer.
nobody there who knows more than me?
|
|
|
hi Guy,
I think I have not found the correct explanation for my problem. I am not talking about recording a memory, where I can adjust mic gain and comp according to the loudness of my voice and sensitivity of my microphone. What I am talking about is recording stations I receive with the AF REC Key. I could not find a knob to adjust the recording level nor to adjust modulation when I replay the recording. When I transmit recorded AF audio the ALC meter always is on its upper limit. This is even when the recorded audio is only noise without modulation. 73! Werner oe9fwv Guy Olinger K2AV <[hidden email]> wrote: (13/08/2011 17:46) > You have to watch the ALC while you are recording, for peaks at 4,5,6 > bars. The LEVEL is retained. That is done so that when DVR outputs > are recorded, that the mic gain can be adjusted for the talker without > messing up the DVR output. Otherwise the mic user would be put in the > position of talking at the same level in the mic as whoever whenever > recorded the DVR. This would be a big issue toward the end of a > contest when the talker was losing their voice. > > 73, Guy. > > On Sat, Aug 13, 2011 at 3:49 AM, oe9fwv <[hidden email]> wrote: > > I have sent the following question to the list some time ago, but did not see > > an answer. > > nobody there who knows more than me? > > > > > > oe9fwv wrote: > >> > >> I am using the K3 DVR to record the received audio and play it back to the > >> OM on the other side > >> to give him an impression of his audio. Usually third party listeners told > >> me that the recorded > >> audio sounded nearly equal to the original, but last week I recorded a ham > >> friend very close to > >> me and the replay sounded a little distorted when I retransmitted it. It > >> sounded very good in my > >> monitor though. I have seen that the ALC meter was quite high when I > >> replayed the recorded > >> audio, and it could not be influenced by my mic gain and comp setting. > >> Is this normal and intended? > >> > >> 73! de Werner OE9FWV > >> > >> > > > > > > -- > > View this message in context: http://elecraft.365791.n2.nabble.com/K3-DVR-question-tp6544302p6682808.html > > Sent from the Elecraft mailing list archive at Nabble.com. > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[hidden email] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > -- nPOP Win32 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
Hello Werner!
On Tx, the DVR is injected into the Tx audio path *after* the MIC (or line) gain but before the Tx EQ. Thus, Mic Gain will have no effect on the level of DVR playback, whether recorded in a DVR memory or recorded off the air. TxEQ and CMP settings will effect the DVR's Tx signal, however. The purpose of this is to allow a DVR playback to most closely emulate your normal, mic- or line-based Tx signal. On Rx, the DVR records off-the-air signals just before the AF Gain control is applied. This is to allow you to play back signals to your local speaker and adjust the level, just as you would when receiving the signal. You may with to turn up the gain (to try and hear a weak signal's callsign, for example) or turn it down (to not disturb others nearby, for example). Your AGC settings will definitely affect the record level (threshold and slope). Unfortunately, if you are playing back a signal that you have recorded off-the-air, you have no control over the DVR-to-Tx-audio level. I will look into a way to allow you to adjust this for a future DSP code release. Thank you for bringing this to our attention. 73, Lyle KK7P ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
I would also add to consideration that most playbacks are to let the
other end know exactly what they sound like. So adding any equalizing or processing messes it up. This would be an issue for me because hard TX EQ and fair amount of CMP are what transforms my soft voice to something with over-the-air clarity and punch to it, and I leave it on all the time. Turning all that off to effect a retransmit to let someone hear themself pretty much keeps me from ever using retransmit. Could it be done in such a way that levels are auto-managed, but TX EQ and CMP are off for retransmit if it was loaded from the air? 73, Guy On Sat, Aug 13, 2011 at 1:37 PM, Lyle Johnson <[hidden email]> wrote: > Hello Werner! > > On Tx, the DVR is injected into the Tx audio path *after* the MIC (or > line) gain but before the Tx EQ. > > Thus, Mic Gain will have no effect on the level of DVR playback, whether > recorded in a DVR memory or recorded off the air. TxEQ and CMP settings > will effect the DVR's Tx signal, however. > > The purpose of this is to allow a DVR playback to most closely emulate > your normal, mic- or line-based Tx signal. > > On Rx, the DVR records off-the-air signals just before the AF Gain > control is applied. This is to allow you to play back signals to your > local speaker and adjust the level, just as you would when receiving the > signal. You may with to turn up the gain (to try and hear a weak > signal's callsign, for example) or turn it down (to not disturb others > nearby, for example). > > Your AGC settings will definitely affect the record level (threshold and > slope). > > Unfortunately, if you are playing back a signal that you have recorded > off-the-air, you have no control over the DVR-to-Tx-audio level. > > I will look into a way to allow you to adjust this for a future DSP code > release. > > Thank you for bringing this to our attention. > > 73, > > Lyle KK7P > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by oe9fwv
I believe that DVR recordings are processed through the TX EQ and the
Compression settings when re-transmitted, so it is best to cancel COMP and EQ before transmitting. This has been covered in the past, less than a year ago, but I coudn't find the emails. Sorry... ...bill nr4c -----Original Message----- From: oe9fwv [mailto:[hidden email]] Sent: Saturday, August 13, 2011 3:49 AM To: [hidden email] Subject: [Elecraft] [K3] Re: K3 DVR question I have sent the following question to the list some time ago, but did not see an answer. nobody there who knows more than me? oe9fwv wrote: > > I am using the K3 DVR to record the received audio and play it back to the > OM on the other side > to give him an impression of his audio. Usually third party listeners told > me that the recorded > audio sounded nearly equal to the original, but last week I recorded a ham > friend very close to > me and the replay sounded a little distorted when I retransmitted it. It > sounded very good in my > monitor though. I have seen that the ALC meter was quite high when I > replayed the recorded > audio, and it could not be influenced by my mic gain and comp setting. > Is this normal and intended? > > 73! de Werner OE9FWV > > -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-DVR-question-tp6544302p6682808.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
Bill,
"Bill Conkling" <[hidden email]> wrote: (14/08/2011 06:00) > I believe that DVR recordings are processed through the TX EQ and the > Compression settings when re-transmitted, so it is best to cancel COMP and > EQ before transmitting. Comp 0 does not change anything. Changing TX EQ is not really an option, this will take way too long to change the settings off and on every time. ALC is always on its upper limit here, when I replay recorded AF. I cannot find a way to adjust DVR GAIN. When I record my voice into a memory it works - I can adjust Mic Gain, Comp and TX equalizer and I see the ALC flickering according to the speech. 73! Werner OE9FWV -- nPOP Win32 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by KK7P
hi Lyle,
thank you for your attention. I tried AGC and RF GAIN, and you are right, this is the only way to influence the recorded signal level. With the RF Gain I can adjust the recording level and I think loud signals will sound better when replayed with the RF Gain down. Maybe an automatic gain control for recording off the air would be the best? The way it is now I have the impression that my transmitted AF Play audio is overmodulated (and limited by ALC) This is based on signal reports I have got from my ham friends nearby. Whatever you decide how to solve the problem, either on the recording side or on the replay side or even on both sides, I am sure it will improve the situation. 73! Werner OE9FWV |
«
Return to [K3]
|
1 view|%1 views
| Free forum by Nabble | Edit this page |