Spent some serious time with this feature over the past days. Have to admit I needed to go to the video Demo (see insert).

This app is a beast, so powerful, so promising, but at the same time so difficult to accomplish the goal of creating a full backing chart from a audio .mp3 file. I thought I could just wing it, but too many details. The video tutorial was really helpful. But at this time, while I can't say it can't be done. I can say I can't do it - well at least with ACW alone.

It really takes a high level of skill to really understand a challenging song. In this case the project was: https://www.youtube.com/watch?v=TZ0pXUb5jVU

The song is played rubato with a mixture of 2/4 and 4/4 bars. Of course ACW is no help with this detail.
The chords were easy to locate on the web. However, I was not happy with the chords the ACW pulled up. I think the vocals confuse both bar assignments and chord ID. I spent a day trying to do it with the ACW and my ear before I went and got the sheet music. Humbling to realize how poor my ears are.

I am not done yet, it likely will just take a lot more time.

Just sharing.

Or, I guess I don't have to reinvent the wheel in this case...

http://www.geocities.ws/jayceewicked/#for%20good

I listened to several parts of the song. I would imagine that this particular style would be very challenging for ACW, which essentially attempts to track a fixed tempo while the presentation actually incorporates a huge amount of variance rhythmically.

At the same time ACW is attempting to work out chords when the dominance in the song is really a single voice.

Don't blame your ears, I think this song really is an outlier. And hey, even the pianist is reading from the sheet music

for me ive found sometimes acw works ok others not.
depends on the song or piece and tempo..

the biggest obstacle i face is the time to enter all the bar markers precisely. which i find ever harder if the tempo of a song is fast. its easier if its a slow tempo.
which is why i put in a wish awhile back to have an option in acw to slow the tempo of any song so i can enter bar markers cos i can then more easily listen for drum beats.

om

WOW! Pianist can read music! I'm impressed

Ducking and running for cover!

The sheet music instructs the pianist "Colla voce - Follow the solo voice" - an indication that the vocal part sings in a free manner and the other instruments should follow. When the vocals are in the mix it is near impossible (at least for me) to indentity where the count is. So setting the bar markers by ear or by transient, in ACW was not possible. However, when I isolated only the piano and mute the vocals it is easy to hear the 4/4, but I don't know a way to hear the 2/2 bars in the 4/4. Only the sheet music can tell me that.

Of course we can (well as long as it's only one note at a time and looks like this):

LOL

If you are a guitar player, you just need one more picture to be a piano guy...

I would try learning the Audio Chord Wizard or ACW, using songs that I already knew the key data. For example export audio files of Band-in-a-Box, or BiaB, demo songs then run those files through the ACW.

How do the ACW results compare with a demo song chord sheet? The main thing you can change that greatly influences the ACW results is bar 1 alignment. Try moving it around and see how the position changes the results.

If you have an audio file of a song that modulates, has tempo changes or multiple time signatures try dividing the audio file into smaller multiple files.