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Setting Bar 1 is required by the ACW to correctly align when to begin counting measures. It compensates for the leading recorded time of the audio file that's been inserted onto a track in a BIAB project. In a 4/4 song, it's the very first 1 of 1-2-3-4 and in a 3/4 song, it's the very first 1 of counting 1-2-3- 1-2-3- of the song.

The ACW isn't difficult but it's not easy and requires practice to get even moderately precise with it.

Here are some tips and screen shots I made with the first minute of "Go With The Flow" by Queens of the Stone Age.

* Set up BIAB before importing the song or opening the ACW: (First Screenshot)

Select a style from the StylePicker for the song. My version of BIAB had 139 suggestions.
Change the number of Chorus's to 1 from the default of 3
Disable the Style. (ignore the drums if they default to midi - it's irrelevant at the moment)
Set the end bar around 100 measures.
Complete the song title.
Save the BIAB project.

* Import the audio file before opening the ACW:
Doing this allows you to adjust the imported audio file and have a more precise alignment between the audio file and the BIAB bar settings.
Label the Audio Track with the imported audio to analyze.
* Open the Audio Editor and select the Audio Track. (The Audio Editor defaults to the Melody Track)
This displays the imported audio file and that the audio and BIAB bars are not likely closely synced.
* Set the curser to the first beat at the beginning of the song. Rt click with mouse and select 'Set this point as bar 1 of the song'
* Select the Audio Chord Wizard Button to open the ACW.
* Select the Snap Button to activate Snap to Bar to check the first beat is precisely set to bar 1.
* Add a Bar Line (L) at Bar 1
* Deactivate Snap.
* Play the song from the beginning and pressing the -L- key at each beat for 4-5 measures and stop playback.
* Playback the song from the beginning and adjust the bars that have been set for accuracy by listening and also comparing to the Waveform peaks.
* With the opening bars corrected, select the Auto Marking Button and continue playback and correcting the auto marked bars for accuracy for the remainder of the song.

In my example, "Go With The Flow" by Queens of the Stone Age had a BPM of 159.15 average.

Hope this helps.

Charlie






Attached Files (Click to download or enlarge) (Only available when you are logged in)
Screenshot.jpg (315.13 KB, 156 downloads)
2-Initial imported audio.jpg (415.94 KB, 156 downloads)
Initial imported audio file before aligning bars with BIAB
3-imported audio with Bar 1 correctly set.jpg (421.87 KB, 158 downloads)
Imported audio file correctly aligned with Bar 1 of BIAB.
4-ACW with Bars auto detected.jpg (512.72 KB, 6 downloads)
Audio with ACW detected bars.
Last edited by Charlie Fogle; 11/06/21 05:56 AM.
BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.