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View Full Version : For me this recording is little strange....


Budokan_1982
2005-08-01, 04:55 AM
Originaly recording come from 1975. But I'm not sure if someone piss me off and this will be come from mp3. I saw many shots with frequences on this site and for me right channel is quite ok (propably I'm wrong) in Anal Freq but left is bad. Please check this (copy link and paste on new window and it work):
http://qliverecordings.tripod.com/files/spec.jpg
http://qliverecordings.tripod.com/files/channel_left.jpg
http://qliverecordings.tripod.com/files/channel_right.jpg
and
http://qliverecordings.tripod.com/files/CE1.jpg
but in some seconds on CEP it looks like this:
http://qliverecordings.tripod.com/files/CE2.jpg
http://qliverecordings.tripod.com/files/CE3.jpg


Please help me guys with this !!

range_hood
2005-08-01, 05:43 AM
Looks lossy. You could increase the FFT size in cooledits fa to smooth the line out.

Five
2005-08-01, 06:04 AM
the images CE2 and CE3 are registering incorrectly... it sometimes shows fa like this when you first open a file, if you click the cursor around it will look more like the CE1 image.

In AnalFreq there's a steep dropoff visible on the L but not so visible on the R... also, in the CEP SA the on the left you can see a few telltale black rectangular blocks cutting into the colour... strange that neither AnalFreq nor CEP show any evidence of problems on the R channel but both show evidence on the left. Somehow I doubt that only one channel is lossy! Overall frequency response is terrible so perhaps this is helping to hide the evidence in most places. I'd call this lossy, if you'd like to send me a sample post a yousendit.com link or pm me.

Budokan_1982
2005-08-01, 08:20 AM
Ok Five, I will sent by yousendit.com one song from this but I need Your email adress (sent to me on: budokan@<hidden> )
About this spectrum, on right channel in some places also look like in left channel ... Here is another part of some track from this:
http://qliverecordings.tripod.com/files/spec2.jpg
Looks crapy, ha... ;(

This is very strange audience recording (or my version...) :/ I still don't know what to thinking about this. For that I know this one what I have was never before availible on mp3 (or other shity format) and originaly it was come from tape. Is this possible that the mastertape will looks like this ?

range_hood is this will be good ?:

http://qliverecordings.tripod.com/files/CE4.jpg
http://qliverecordings.tripod.com/files/CE5.jpg
http://qliverecordings.tripod.com/files/CE6.jpg
and the same with higher fft size
http://qliverecordings.tripod.com/files/CE4_2.jpg
http://qliverecordings.tripod.com/files/CE5_2.jpg
http://qliverecordings.tripod.com/files/CE6_2.jpg

Five
2005-08-01, 02:06 PM
ahh, now I can see the blockiness all over the place on both channels in the new cep sa you posted. this is lossy. perhaps the trader who gave it to you didn't realize that it wasn't a good source, you should let him/her know and cease to trade this.

as for fft size on cep fa, increasing it doesn't seem to help display the dropoff :confused: that trick does work with eac for some reason.

I also sent you an email. If you still want to send me a sample I'll look it over but I'm positive after seeing the 2nd cep sa that this is lossy.

range_hood
2005-08-01, 03:43 PM
as for fft size on cep fa, increasing it doesn't seem to help display the dropoff :confused: that trick does work with eac for some reason.


could be that cool edit is too exact on this. There are these vertical lines all over (statics) and the dropoff isnīt that clean all the way. On that pic you posted, Five, this looks somewhat minidicish or aac-style.

Thatīs why I like these black and white spectrals.

Five
2005-08-01, 03:55 PM
I should play around with b&w sa... how do you do that?

range_hood
2005-08-01, 04:30 PM
Thats how I have it:

Cool Edit pro 2.00
options > settings >

"colors" tab > "spectral" tab
Spectral High energy: black (highlight > change color)
Spectral Low Energy: white

Gamma: 0.4

Five
2005-08-01, 04:37 PM
thanks very much... now I'm cooking with gas. you can really see the noise in the highs with this view. what is the gamma setting all about?

range_hood
2005-08-01, 07:31 PM
For the gamma I have just the following link, as Iīm not familiar with that:
http://en.wikipedia.org/wiki/Gamma_correction

I choose .4 cause the blocks came out so nicely on lossy recordings. My TFT hasnīt got that good contrast/brightness.

Five
2005-08-01, 11:40 PM
ahh, I see. I guess I'll try playing around with it and see what works best on my monitor.

Budokan_1982
2005-08-02, 01:48 AM
Five, I hope You got this adress to 16sec sample what I sent to Your mail box :)

Budokan_1982
2005-08-02, 09:05 AM
Is this possible that the original equipment (reel to reel machine ?) what record this on 1975 was so crapy and that's why it's look so strange ?

Five
2005-08-02, 02:43 PM
I won't be able to get to the sample today, most probably tomorrow I can take a close look at it and post back here.

Is this possible that the original equipment (reel to reel machine ?) what record this on 1975 was so crapy and that's why it's look so strange ?
the weak frequency response could be explained by this but the rectangular blocks cannot be created by anything other than lossy encoding. I'm just going to double-check this, I'm quite positive that its lossy.

Budokan_1982
2005-08-05, 03:00 AM
I'm realy sad at know... :mad: :(

By the way last 2 other recordings from 1981, Mexico, poor quality, the guy who sent to me this tell that it's a copy from tapes and best availible version (each recording have 2 "big tracks" so looks like from tapes), but propably not (copy link and paste on new window and it work):

http://qliverecordings.tripod.com/files/Monterrey_tape.jpg
http://qliverecordings.tripod.com/files/Monterrey_tape_fa.jpg

http://qliverecordings.tripod.com/files/Puebla_tape.jpg
http://qliverecordings.tripod.com/files/Puebla_tape_fa.jpg

Thanks guys !!!

Five
2005-08-05, 12:25 PM
Okay, I took a look at the 1st sample you sent me. Especially using the "Classic Cool" colour scheme for SA in CEP I could see a clear cutoff aside from the extraction errors I switched over to Black & White (as range_hood explains above) and wham! This clearly shows the recording to be lossy, check out those blocks--this can only be the result of lossy encoding in the lineage.

Five
2005-08-05, 12:28 PM
I'm realy sad at know... :mad: :(

By the way last 2 other recordings from 1981, Mexico, poor quality, the guy who sent to me this tell that it's a copy from tapes and best availible version (each recording have 2 "big tracks" so looks like from tapes), but propably not (copy link and paste on new window and it work):

http://qliverecordings.tripod.com/files/Monterrey_tape.jpg
http://qliverecordings.tripod.com/files/Monterrey_tape_fa.jpg

http://qliverecordings.tripod.com/files/Puebla_tape.jpg
http://qliverecordings.tripod.com/files/Puebla_tape_fa.jpg

Thanks guys !!!
As for this show, it does not look good at all. A clear, sharp cutoff like that is bad news but there is a slight chance that this is just a horrible nr job / LPF.

Try setting CEP to Black & White, zoom to a 2 second spectral analysis and post up a pic. You can also send me a sample from this show if you wish and I'll take a look at it on my comp. Here's how you get the b&w:
Thats how I have it:

Cool Edit pro 2.00
options > settings >

"colors" tab > "spectral" tab
Spectral High energy: black (highlight > change color)
Spectral Low Energy: white

Gamma: 0.4
thanks again, range_hood this is very useful!

ssamadhi97
2005-08-06, 08:06 PM
As for this show, it does not look good at all. A clear, sharp cutoff like that is bad news but there is a slight chance that this is just a horrible nr job / LPF.
Out of curiosity, ever seen an NR job that looked like that, or reproduced it by NR-ing something yourself? I haven't, but I'd instinctively say that NR output looks different (as in it usually won't induce steep bandpass filtering)

Five
2005-08-06, 08:52 PM
okay, maybe the cutoff wouldn't be so steep... the highs would certainly go missing. I had a really badly nr'ed show on my drive but recently deleted it for obvious reasons... I'll post some shots the next time I get one like that.

Budokan_1982
2005-08-08, 04:43 AM
Thanks a lot guys ! It's a bad news :rolleyes: :( :mad:

This 2 recordings have poor quality. And looks bad on this pics...
On b/w spectral analysis:
http://qliverecordings.tripod.com/files/recording_1.jpg
http://qliverecordings.tripod.com/files/recording_2.jpg

Is this possible that this recording nr1 was come from bad radio source?
Anyway recording nr2 soon I got propably from radio source, with better sound but it's another story.

Five I will sent to You this links to yousendit , 2 short samples (5 sec) with this recordings.

Budokan_1982
2005-08-23, 02:38 AM
Thanks a lot guys ! It's a bad news :rolleyes: :( :mad:

This 2 recordings have poor quality. And looks bad on this pics...
On b/w spectral analysis:
http://qliverecordings.tripod.com/files/recording_1.jpg
http://qliverecordings.tripod.com/files/recording_2.jpg

Is this possible that this recording nr1 was come from bad radio source?
Anyway recording nr2 soon I got propably from radio source, with better sound but it's another story.
.

Someone tell me whats wrong with this :hmm: ? Please, one word and than I dissappear !