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Author Topic: Audacity (osx): How to mix two AUD sources?  (Read 49658 times)

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Offline TheBishop

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Re: Audacity (osx): How to mix two AUD sources?
« Reply #135 on: May 22, 2020, 09:55:11 PM »
Thanks, I appreciate that. Next up is a Toubab Krewe show that I've been needing to master for several months now.

Offline morst

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Re: Audacity (osx): How to mix two AUD sources?
« Reply #136 on: August 02, 2020, 03:30:14 PM »
Bumping this thread, because I just re-wrote the instructions for my morst-Audio-Speed-Converter.XLSX spreadsheet, which is available for free download still at this link:

"This spreadsheet is a tool which can calculate the percent of ""Speed Change"" needed, in order to synchronize two uninterrupted audio tracks, made with different digital recorders which did not have timing clocks locked together.
This tool was made for use along with the Audacity workstation software. Audacity is availble as a free download for PC, MAC, and Linux. This tool's results can likely be used for other workstation software, as well."   

"Before using this tool, the user should precisely locate and mark four points within the two tracks to be synchronized, in order to make find the two values to feed this tool.
To make a track mark (label) in Audacity on PC, use the mouse and click the point in the track, then use Control-B keyboard shortcut, or go to Tracks > Add Label At Selection. On MacOS, it's Command B.
For greatest accuracy over long files, the two points at which the files are be synchronized should be as far apart in time as is practical, that is, one near the start of the shortest segment, and one near the end of it.
As each point is located and marked, the start time of the file to be changed should also be marked.
The two marked start times are where the difference in time between the sync points of the file to be changed may be most easily measured, as the waveform of the first spot moves from its marked location when the user finds the second spot.
Rather than having to find the same bit of the pattern to mark again, it is much easier to simply use the start of the track as a proxy.
If it is not practical to use the start times, the file end points may alternately be used."   
"To use this tool, the user enters two values, and the desired output is the Speed Change value (% differnce), which can then be used in the AUDACITY workstation software's Speed Change plugin, in order to synchronize the tracks.
The primary version on lines 4-5 allows the user to enter the length of the reference file, in samples, and the number of samples in between the marked start points. (see above)
The optional version on lines 9-10 allows the user to enter two track lengths, in samples. This might be useful for matching a soundtrack to the scratch audio of a video production, for instance, or making guesstimations"                                                                       

comments welcome?!


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