Hi Noel,

I'm well aware of the difference between short sampled MIDI sounds and full length audio files as I formerly did software testing for a music synth company.

I've also recorded and released a fair amount of music using MOTU's Digital Performer and Apple's Logic Pro.

I also regularly use Transcribe! software to pitch shift audio files when transcribing or simply practicing a song in various keys.
And yes, I'm quite familiar with the artifact issues of big changes – especially with audio that has a lot of transients.

As you mentioned, BIAB RealTracks are recorded in multiple keys to allow the user to create songs in all 12 key centers.
Therefore, the required audio files already exist – nothing needs to be pitch shifted.

You're making a mistake in thinking that audio files would need to be changed in order to have the displayed key be different from the actual sounding audio key.


All that needs to be changed are the pixels on the computer screen creating the chord name graphics.
That's what <Concert Pitch Adjust> should be doing – it does not have to change any audio files by even a microtone, (let alone a minor third or maximum a tritone).

I thought I made it quite clear in my previous post that when I type in C7 (for example), with Concert Pitch Adjust set to either +3 or -9, BIAB should load the appropriate audio files for Eb7 – which as you yourself noted, already exist – absolutely NO need for any extraordinary pitch shifting at all.

Take any RealTracks style, create a song in the key of C and play it back.
Then select transpose by any of the several methods.
Listen to the new key – no problem at all. All the required audio files are loaded appropriately and play back as expected.


Please understand that the issue is how BIAB draws chord names on the screen when in Concert Pitch Adjust mode.
(And, of course, how BIAB interprets your chord name input. Either way you look at it, it's a screen pixel issue – NOT audio.)

This is most definitely a serious but fixable UI bug that has nothing to do with pitch shifting audio files.


Perhaps one of the pgmusic developers could respond.

(All my posts are regarding the Macintosh version)