girltunes Posted November 17, 2010 Share Posted November 17, 2010 I have to clean up a background hum in a dialogue track (aiff file) any helpful suggestions -- I have Logic Pro 8 MacBook Pro OSX 10.5.8 Tascam FW 1082 Thanks! Link to comment Share on other sites More sharing options...
David Nahmani Posted November 17, 2010 Share Posted November 17, 2010 Options > Audio > Open in Soundtrack Pro. Then find a place where there's only hum - no dialog. Select that (drag the pointer tool over it). Process > Noise Reduction > Set Noise Print. Click anywhere on the waveform to deselect the hum portion. Process > Noise Reduction > Reduce Noise. Adjust, Process, and save (File > Save). Back to Logic. Voila! Link to comment Share on other sites More sharing options...
ski Posted November 17, 2010 Share Posted November 17, 2010 Depends on the nature of the hum. Not all hum is created equal. If it's 60 cycle line hum then you can try an EQ with a very narrow notch (cut) at 60 Hz. Usually line hum has harmonics too, but the 'fundamental' of line hum -- often the loudest component -- is at 60 Hz. Otherwise, the best best would be to make an mp3 of a small portion of the track and post it here. Really, the only way to pinpoint advice on this is for us to be able to hear the nature of the hum. That aside, I hear tell that Soundtrack Pro has some really good noise reduction plugins. Link to comment Share on other sites More sharing options...
ski Posted November 17, 2010 Share Posted November 17, 2010 That's two in a row now, David. I tell you, we must stop jointly double-posting like this! Link to comment Share on other sites More sharing options...
David Nahmani Posted November 17, 2010 Share Posted November 17, 2010 That's two in a row now, David. I tell you, we must stop jointly double-posting like this! OK ok... I'll go back to my nice glass of Syrah, make some space for you. Link to comment Share on other sites More sharing options...
ski Posted November 17, 2010 Share Posted November 17, 2010 OK ok... I'll go back to my nice glass of Syrah, make some space for you. I was gonna say... I'll be over in a few minutes, so make a space for me at the table next to that bottle. Link to comment Share on other sites More sharing options...
Anonymph Posted November 17, 2010 Share Posted November 17, 2010 Essentially I think the soundtrack pro option does this; but manually in the pre-soundtrack pro days, I had to copy a non-dialog area of hum as described above, paste it to a second track, loop it to extend it through to last the entire original take, but invert the wave to have the noise wave forms cancel each other out. Hooray for physics! Too bad it was hit or miss with the results. Another option: sometimes it's effective enough just to silence the non-dialog areas between words with a wave editor. Coupled with the creative EQ notching described earlier above should make a world of difference. Link to comment Share on other sites More sharing options...
David Nahmani Posted November 17, 2010 Share Posted November 17, 2010 Essentially I think the soundtrack pro option does this Actually I'm not sure exactly what it does or how it does it but the result is much better than with the technique you describe. I mean, your technique would work ok for a cyclical waveform (something with a pitch), but not at all for white noise. STP's process is great for that kind of random noise. Link to comment Share on other sites More sharing options...
Anonymph Posted November 17, 2010 Share Posted November 17, 2010 Agreed. I don't suggest anybody do it that old way which is why it was hit or miss. In theory, not only a pitch or tone, but lining up the peaks and troughs of the waves opposite each other would be the only way for it to work correctly. What a pain. Just describing the caveman days. I've only used soundtrack pro twice, and it was just for that white noise cleanup feature. Now that i think of it, I doubt it works that old way above at all. I wonder if it's just a compressor or some kind of noise gate, which would make more sense to me. Hmm. Link to comment Share on other sites More sharing options...
girltunes Posted November 17, 2010 Author Share Posted November 17, 2010 am unable to drag new and improved dialog track back to Logic -- I did a "save as" in Sound Pro 2.0.2 of the noise reduced version; but Logic won't let me import it...hmmmm Thanks for all the great help so far!!! ...hope you can help me solve this last step... Link to comment Share on other sites More sharing options...
David Nahmani Posted November 18, 2010 Share Posted November 18, 2010 girltunes, in Soundtrack Pro 2, you have to first choose Process > Flatten all Actions, then File > Save. Then there's no need to reimport, Logic will now see the updated audio file. Link to comment Share on other sites More sharing options...
girltunes Posted November 20, 2010 Author Share Posted November 20, 2010 just want to make sure that I don't destroy original file when I do this- is it nondestructive? thanks!! Link to comment Share on other sites More sharing options...
ReinMan Posted November 20, 2010 Share Posted November 20, 2010 OK ok... I'll go back to my nice glass of Syrah, make some space for you. I was gonna say... I'll be over in a few minutes, so make a space for me at the table next to that bottle. RENT A ROOM! Link to comment Share on other sites More sharing options...
Rev. Juda Sleaze Posted November 21, 2010 Share Posted November 21, 2010 just want to make sure that I don't destroy original file when I do this- is it nondestructive? thanks!! Duplicate the file, then you will always have the original to duplicate again and play with. Play is healthy Link to comment Share on other sites More sharing options...
Rev. Juda Sleaze Posted November 21, 2010 Share Posted November 21, 2010 RENT A ROOM! Play is healthy Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.