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Help for this distortion
damjang
post Sep 30 2012, 17:06
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I'm a newbie and ask here if somebody can help. I have recorded the attached clip from a pianola (line-out jack) to a pc. But I don't know why I have this distortion. I think that this is not a level problem. Is it possible to remove or repair? How? And for the future: how I can avoid this?
Thank you!


Attached File(s)
Attached File  distorsion.flac ( 529.22K ) Number of downloads: 103
 
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Glenn Gundlach
post Sep 30 2012, 17:27
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QUOTE (damjang @ Sep 30 2012, 08:06) *
I'm a newbie and ask here if somebody can help. I have recorded the attached clip from a pianola (line-out jack) to a pc. But I don't know why I have this distortion. I think that this is not a level problem. Is it possible to remove or repair? How? And for the future: how I can avoid this?
Thank you!


A problem is I don't know what it's _supposed_ to sound like. I hear what sounds like frequency response shifting as the level goes down similar to analog Dolby playback processing of a non Dolby encoded source. There may be some frequency response changes but again, I don't know what it's _supposed_ to be.

When I go look up 'pianola' I find "A player piano (also known as pianola or autopiano) is a self-playing piano, containing a pneumatic or electro-mechanical mechanism that operates the piano action via pre-programmed music perforated paper,...." based on a real piano which has no 'line out' jacks. So, what exactly are you doing?

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damjang
post Sep 30 2012, 17:50
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Sorry! I use a digital piano (a Yamaha Clavinova) and record the sound from line-out to pc line-in. I use Audacity for record. But sometime I have the recorded sound that sounds like if there was a clipping (like in the attached clip), but the signal is not so high... I must set the record level in audacity to something very low.
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lvqcl
post Sep 30 2012, 17:53
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IMO the attached file doesn't sound like clipped.
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mzil
post Sep 30 2012, 20:06
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On first playback I thought I heard a very brief problem on one of the very first notes only, a "tick", but then when I hit replay it was fine. [I used VLC as my media player. I think it needed to warm up. wink.gif ]

You can clearly hear that this isn't a real piano, it is an electric one, but other than that I don't hear a problem. [Also the tune itself sounds a little odd at 6 seconds in terms of the notes selected, but I don't know the piece.]

This post has been edited by mzil: Sep 30 2012, 20:10
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Glenn Gundlach
post Sep 30 2012, 23:11
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QUOTE (lvqcl @ Sep 30 2012, 08:53) *
IMO the attached file doesn't sound like clipped.


Second time listening I captured with Audition. The reason you hear no clipping is because there isn't any at all. I don't know if his record level is best but it certainly isn't overloading.

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damjang
post Oct 1 2012, 09:12
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So, at this point I think that it must be a problem of my hw (pc audio, ampli, spekers). I must research more...
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Glenn Gundlach
post Oct 1 2012, 09:47
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QUOTE (damjang @ Oct 1 2012, 00:12) *
So, at this point I think that it must be a problem of my hw (pc audio, ampli, spekers). I must research more...


If your PC works like mine, you should be able to record a signal that on playback is indistinguishable from the original. This assumes you have high enough levels to be away from the noise floor but not drive into clipping. I use Audition but I hear many good things about Audacity. BTW none of my gear needs to 'warm up' before it's ready to behave properly. The PC is ready as son as it boots.

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_if
post Oct 2 2012, 08:40
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I've got no distortion either, so it must be on your end. But I just wanted to say I like it and so does my girlfriend! biggrin.gif
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