Comments on: Tango Audio Restoration http://simbatango.com/2010/03/01/tango-audio-restoration/ Reflexiones de un león Tue, 07 Feb 2012 20:44:43 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Simba http://simbatango.com/2010/03/01/tango-audio-restoration/comment-page-1/#comment-639 Simba Wed, 17 Mar 2010 18:53:47 +0000 http://simbatango.com/?p=1274#comment-639 I got it at <a href="http://www.buenosairestangoclub.com/" rel="nofollow">BATC</a> in Buenos Aires, the catalog number is ORQ-209. Your idea is basically how the existing click removal tools work, the recordings are mono recordings, but if you transfer them with stereo equipment, you read both walls of the groove wall, and use statistical analysis to guess what is signal and what is noise. Doing it with more than one disc would be more complicated, aligning the two tracks with differences in speed and various distortions. I'm not really an expert, I suggest you try <a href="http://hydrogenaudio.org" rel="nofollow"> hydrogenaudio </a> if you want to discuss with the real experts. I got it at BATC in Buenos Aires, the catalog number is ORQ-209.

Your idea is basically how the existing click removal tools work, the recordings are mono recordings, but if you transfer them with stereo equipment, you read both walls of the groove wall, and use statistical analysis to guess what is signal and what is noise. Doing it with more than one disc would be more complicated, aligning the two tracks with differences in speed and various distortions. I’m not really an expert, I suggest you try hydrogenaudio if you want to discuss with the real experts.

]]> By: John Ellis http://simbatango.com/2010/03/01/tango-audio-restoration/comment-page-1/#comment-636 John Ellis Wed, 17 Mar 2010 09:25:19 +0000 http://simbatango.com/?p=1274#comment-636 Dear Simba, You have done a good job with that Manuel Buzon track, I'm particularly interested to source some of his music which is delightful, but very scarce. Do you mind telling me where you obtained it? I'm a tango dj in Perth Western Australia, and more fussy than most, about sound quality and music quality generally. I just discovered that BA Tango Club have a Buzon cd listed which I immediately ordered, in blind hope...I have just 6 tracks here. John PS from my dj experience I think a minimum of crackle removal is OK, the treble is very directional and not noticed by most of the dancers. It's more important to boost the upper-bass frequencies, above about 200 Hz, that is the food that the dancers need. I have an idea about track restoration that I don't have the skills to try. It's based on the random nature of pops and crackles. It would use their randomness as their Achilles Heel. The starting point would be to obtain at least two different copies of the same 78 track. They would both be digitised and compared electronically, and anything that did not appear on both, would be discarded from the processed version. What do you think? Dear Simba,
You have done a good job with that Manuel Buzon track, I’m particularly interested to source some of his music which is delightful, but very scarce. Do you mind telling me where you obtained it? I’m a tango dj in Perth Western Australia, and more fussy than most, about sound quality and music quality generally. I just discovered that BA Tango Club have a Buzon cd listed which I immediately ordered, in blind hope…I have just 6 tracks here.
John
PS from my dj experience I think a minimum of crackle removal is OK, the treble is very directional and not noticed by most of the dancers. It’s more important to boost the upper-bass frequencies, above about 200 Hz, that is the food that the dancers need.

I have an idea about track restoration that I don’t have the skills to try. It’s based on the random nature of pops and crackles. It would use their randomness as their Achilles Heel. The starting point would be to obtain at least two different copies of the same 78 track. They would both be digitised and compared electronically, and anything that did not appear on both, would be discarded from the processed version. What do you think?

]]> By: Simba http://simbatango.com/2010/03/01/tango-audio-restoration/comment-page-1/#comment-608 Simba Tue, 02 Mar 2010 10:56:22 +0000 http://simbatango.com/?p=1274#comment-608 @Bruno: I agree, use your ears. The illustration is just that - an illustration (taken from the Pancho track). The 20s stuff is very hard to fix, yes. You're right about time spent, and this is a demonstration of what can be achieved with little effort. For click removal I used the default settings, no tweaking at all, and moderate noise removal, well a little more aggressive on the Pancho obviously. I actually think djs don't clean their records for good reasons, but I'll get back to that :-) @TP: I like them too, La Bruja is denoised by the noise profile of another song on the same album (track 1). All click removal with default 78rpm settings. I guess it processes the sound 3-5 times real time for click repair depending on the damage on my three year old laptop, and a bit faster for denoise. In addition you have to convert to wav first and back to whatever format you use afterwards. @Bruno: I agree, use your ears. The illustration is just that – an illustration (taken from the Pancho track).

The 20s stuff is very hard to fix, yes. You’re right about time spent, and this is a demonstration of what can be achieved with little effort. For click removal I used the default settings, no tweaking at all, and moderate noise removal, well a little more aggressive on the Pancho obviously.

I actually think djs don’t clean their records for good reasons, but I’ll get back to that :-)

@TP: I like them too, La Bruja is denoised by the noise profile of another song on the same album (track 1). All click removal with default 78rpm settings.

I guess it processes the sound 3-5 times real time for click repair depending on the damage on my three year old laptop, and a bit faster for denoise. In addition you have to convert to wav first and back to whatever format you use afterwards.

]]> By: TP http://simbatango.com/2010/03/01/tango-audio-restoration/comment-page-1/#comment-594 TP Mon, 01 Mar 2010 22:52:12 +0000 http://simbatango.com/?p=1274#comment-594 BTW. I tried Sound Forge and didn't like the results that I got. BTW. I tried Sound Forge and didn’t like the results that I got.

]]> By: TP http://simbatango.com/2010/03/01/tango-audio-restoration/comment-page-1/#comment-593 TP Mon, 01 Mar 2010 22:43:27 +0000 http://simbatango.com/?p=1274#comment-593 Very good result, I like the difference on Al Verla Pasar and la Bruja. So you used ClickRepair to batch repair the whole CD? How long does it take to process 20 tracks? Very good result, I like the difference on Al Verla Pasar and la Bruja. So you used ClickRepair to batch repair the whole CD? How long does it take to process 20 tracks?

]]> By: Bruno Afonso http://simbatango.com/2010/03/01/tango-audio-restoration/comment-page-1/#comment-592 Bruno Afonso Mon, 01 Mar 2010 22:12:01 +0000 http://simbatango.com/?p=1274#comment-592 It is very dangerous to make a lot of conclusions from a graphic display of the waveform in a DAW. Manually getting rid of clicks should be your last option in this day and age when you can spend money on stuff like iZotope RX for example. Algorithmix also. De-noising is probably the easiest way to screw up a song. It is, unfortunately very hard to do. :( Your Pancho is a good example of how hard it is to clean them without making them sound muffled. The processed version is less lively and much more subdued. Unfortunately my laptop was stolen so I can't have a go at these songs. But each track is a track as there are many factors as to why noise profiles won't be the same. It all boils down to how much time one has and wants to invest on it. Thanks for bringing the attention to this. I'm surprised so many DJs haven't cleaned a bit their versions.. but then again, I'm a bit of an audiophile :-) It is very dangerous to make a lot of conclusions from a graphic display of the waveform in a DAW. Manually getting rid of clicks should be your last option in this day and age when you can spend money on stuff like iZotope RX for example. Algorithmix also.

De-noising is probably the easiest way to screw up a song. It is, unfortunately very hard to do. :( Your Pancho is a good example of how hard it is to clean them without making them sound muffled. The processed version is less lively and much more subdued.

Unfortunately my laptop was stolen so I can’t have a go at these songs. But each track is a track as there are many factors as to why noise profiles won’t be the same. It all boils down to how much time one has and wants to invest on it.

Thanks for bringing the attention to this. I’m surprised so many DJs haven’t cleaned a bit their versions.. but then again, I’m a bit of an audiophile :-)

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