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Old 10-02-2010, 10:15   #1
simone
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6015 kHz The Disco Palace from Issoudun

"The Disco Palace" will start daily transmissions at 1400- 1500 UTC on 6015 kHz from Issoudun today, using 60 kW RMS and 2 / 2 antenna at 60° as on TDPradio transmissions.

Please post results and comments here.

Thanks,
Simone
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Old 10-02-2010, 13:30   #2
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Too sad it's just a one-hour-brodcast... I like the "now-playing"-service but dislike the typical TDP-sound-quality.

>99% CDA but I noticed some audio-feed-drop-outs.
Nice jingles, btw.

As you can see in the logfile, I still have some problems with the plotting software but will reinstall everything in the next days. Hopefully it will work then.
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File Type: png disco.PNG (15.0 KB, 347 views)
File Type: png disco_log.PNG (61.1 KB, 308 views)
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Last edited by drmdab : 10-02-2010 at 14:07.
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Old 10-02-2010, 14:08   #3
FritzWue
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Some minor problems with the sound feed.
I like the typical TDP-sound-quality and dislike disco music.
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File Type: png 6015_100210_1443_DK6QI.png (11.5 KB, 313 views)
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Old 11-02-2010, 16:41   #4
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Quote:
Originally Posted by drmdab
Too sad it's just a one-hour-brodcast... I like the "now-playing"-service but dislike the typical TDP-sound-quality.

>99% CDA but I noticed some audio-feed-drop-outs.
Nice jingles, btw.

As you can see in the logfile, I still have some problems with the plotting software but will reinstall everything in the next days. Hopefully it will work then.

Interesting to read that listeners have a different view on audio quality. We at TDP are trying to obtain the highest audio quality possible, so any advice from listeners is most welcome.

As far as we understand, BNR is sometimes using mode A, but in mono. Do you prefer mono instead of parametric stereo? Do you know advantages and/or distadvantages for using mode A instead of mode B?
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Old 11-02-2010, 16:42   #5
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Quote:
Originally Posted by drmdab
Nice jingles, btw.

Nice to hear that you like the jingles .
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Old 11-02-2010, 17:06   #6
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Dear Ludo,
you asked drmdab about modes and bitrates, anyway I would like to comment on this if you don´t mind.
With mode A you get a higher bitrate with about the same robustness of the signal, besides on the transmissions from BNR you can also see that on some transmissions form VT Group originating from the UK, also BBC&DW use it during the day. Unfortunately on your transmissions on 6015 kHz from Issoudun in my location the IR is too long for using mode A, so I would be outside the service area, I can send you some RSCI recordings if you are interested.
Maybe it would work on the US transmissions with the higher frequency.
Concerning parametric stereo, for low bitrates I would prefer mono, but from about 20 kb/s using parametric stereo is OK.
Regards,
Simone
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Old 11-02-2010, 20:03   #7
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Hi Ludo,

thanks for your reply. It's always good to see broadcasters interact with their listeners on forums like this one.

First of all, the audio-quality on your broadcasts is not bad.
But I notice that some transmissions sound very "metallic" (e.g. REE Spain, RRI Romania, BBC & DW sometimes) while others sound a little bit "warmer" (HCJB managed to do this when they were using about 16 kbps, see also BNR Bulgaria). I know that I am going into the direction of the muffled AM medium-wave sound again but I hate it if my ears are hurting because of listening to a DRM station that has very strong high sound-frequencies* and nothing into the direction of bass. I have to admit that this is quite difficult to realize at <30 kbps AAC+...
How do the other users think about this?

* now I am reaching the limits of my English skills.

I would love to see a discussion about the DRM sound-quality here on the forum as we mainly focussed on the transmitter-technology before. Maybe we should use another thread for this?
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Old 11-02-2010, 20:17   #8
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Quote:
Originally Posted by drmdab
Hi Ludo,

First of all, the audio-quality on your broadcasts is not bad.
But I notice that some transmissions sound very "metallic" (e.g. REE Spain, RRI Romania, BBC & DW sometimes) while others sound a little bit "warmer" (HCJB managed to do this when they were using about 16 kbps, see also BNR Bulgaria). I know that I am going into the direction of the muffled AM medium-wave sound again but I hate it if my ears are hurting because of listening to a DRM station that has very strong high sound-frequencies* and nothing into the direction of bass. I have to admit that this is quite difficult to realize at <30 kbps AAC+...
How do the other users think about this?

I would love to see a discussion about the DRM sound-quality here on the forum as we mainly focussed on the transmitter-technology before. Maybe we should use another thread for this?

Would be interestig to have others opinion on audio quality.

Do I understand it right that for you the main difference for a "warm" or "metallic" sound is the absence or presence of higher frequencies? In that case, it could be achieved by turning off the SBR, I think. On the other hand, SBR was developed to restore the higher frequencies which often disappear by compressing to low bitrates, isn't it?

We believed that by using AAC+SBR+PS, we would achieve the closest result compared to the original audio. But we are open to suggestions in order to improve our overall audio quality. It would be nice to have a sound that is as original as possible, warm and not metallic, taking into account the limitations by compressing extensively.
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Old 25-02-2010, 17:01   #9
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I suggested to Mathias CVC DRM 17,860 khz to change the mode B to Mode A and so remained until today. The rate of bitrate is 18 Kbps, mode A, P. Stereo. Here in southern Brazil, the signal is easily decoded. The audio quality is good, but it would be better if the rate was higher bitrate. A good equalization of frequency modulation of the audio before the audio DRM leave with much more quality.
Contact Mathias and ask if the results are good.
Mathias Svensson <mathias@cvclavoz.cl>

The sign of the TDP in the range of 17 Mhz is coming here but it is very weak, I am not able to decode the audio unfortunately.

*******************************************

Eu sugeri ao Mathias da CVC DRM 17.860 khz para mudar de mode B para Mode A e assim ficou até hoje. A taxa de bitrate está em 18 Kbps, mode A, P.Stereo. Aqui no sul do Brasil o sinal é facilmente decodificado. A qualidade do áudio é boa, porém seria melhor se a taxa de bitrate fosse maior. Uma boa equalização das frequências de áudio antes da modulação DRM deixaria o áudio com muito mais qualidade.
Entre em contato com Mathias e pergunte se são bons os resultados.
Mathias Svensson <mathias@cvclavoz.cl>

O sinal da TDP na faixa de 17 Mhz está chegando por aqui mas é muito fraco, não estou conseguindo decodificar o áudio infelizmente.
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www.zandomenego.com/ataliba/drm

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Old 25-02-2010, 18:27   #10
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The Disco Palace now in stereo

Dear All,


We are happy to report that we have fixed the mono problem for The Disco Palace. So from now on, even better audio quality, because in stereo!

Hope you will enjoy even more. Any comments of course always welcome.

All the best,


Ludo

BTW : unbelievable or not, the problem was with ... Vista
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Old 10-02-2010, 14:13   #11
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I can understand your different taste of music but how can you be statisfied with that metallic sound?
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Old 10-02-2010, 14:17   #12
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Reception at Paris.
Daniel
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Old 10-02-2010, 14:28   #13
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Quote:
Originally Posted by drmdab
I can understand your different taste of music but how can you be statisfied with that metallic sound?

Hi Douglas,

compared to many other DRM stations TDP sounds good with my EDIROL MA-15D speakers,
i.e. RTL, B5aktuell etc. sound much worse.
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Old 10-02-2010, 14:56   #14
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Good results, just some of the small dips due to the Tx problem, did not notice any MDI feed problems, sound quality is OK, nice to see dynamic labels are working.
Two logs, second log is with a CIAO H101 that I currently have for testing.
Simone
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Old 10-02-2010, 15:43   #15
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Quote:
Originally Posted by FritzWue
compared to many other DRM stations TDP sounds good
That's correct, Fritz. By the way, I think that the guys at BNR Digital did a quite good job regarding the audio-quality of their DRM transmission. TDP sounds okay, but not that good.

Actually I should be happy to be able to listen to a new DRM station, shouldn't I?

Great log with CIAO Radio, Simone!
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