Playback Prophet-6 recording with Logic Pro makes the oscillator transpose

[the dipster]

Does anybody know how to resolve this issue? I have my P6 connected through USB to my macbook. I record a track in Logic Pro (midi through external instrument). The moment I start playing it seems the P6's oscillators get tuned up like 2 octaves. I cannot recall changing any settings in either the P6 or Logic Pro. I am on the latest firmware 1.7.5.

In the attached audio file you can first hear me playing my patch, then i start recording in logic and i play the same chord and you can hear it go crazy... what is happening?

Any help is greatly appreciated!

[thirteen_engines]

At first glance it sounds like Logic is somehow sending midi to transpose the P6. I don’t use Logic myself but rather Cubase and once had a similar problem in which when Cubase started recording the patch changed on my synth. It turned out to be a midi command hiding at the beginning of the midi track.

This being the case you might try firing up a midi monitor program on your Mac and looking for anything suspicious when Logic starts recording.

Keith

[the dipster]

At first glance it sounds like Logic is somehow sending midi to transpose the P6. I don’t use Logic myself but rather Cubase and once had a similar problem in which when Cubase started recording the patch changed on my synth. It turned out to be a midi command hiding at the beginning of the midi track.

This being the case you might try firing up a midi monitor program on your Mac and looking for anything suspicious when Logic starts recording.

Keith

Thanks for your help Keith. I tried this with an app called MidiView. It does not show any program changes whatsoever the moment I start playing while Logic is in playback or record mode. Yet the sound changes.