User Alt Tuning Problem

[larryaz]

I have a 2000 Fender/Roland Strat with the built-in GK-2A pickup.  I've used it with the GP-10 for some basic acoustic modeling and such and it seemed to work fine.  I recently swapped out the standard pickups and upgraded the bridge/tremolo, and the basic GP-10 stuff continues to work fine.  However, I just tried an alt tuning for the first time and got awful results and I'm not sure if the alt tuning I am trying is the issue or if I might have messed something up with the pickup/bridge swap.

I tried some of the 'stock' Drop-D and Open tunings and they sound fine.  But if I tried the Gsus4 user tuning (trying to play Led Zep Rain Song) it is just horrendous:

Low E string down 2 steps => D
A down 2 steps => G
D down 2 steps => C
G same
B up half step => C
High E string down 2 steps => D

In particular the D (C) and B (C) strings are really out of tune.  I experimented with the partial tuning but couldn't get it to work.

Am I asking too much of the GP-10 (verified by maybe someone trying the same alt tuning with a known-good setup?), or could I have done something wrong with the parts swap -- and what might I try to remedy the situation?

[Elantric]

Backup patches

Perform a full GP-10 Reset

[larryaz]

Thank you!  Had to go out of town but finally tried this today.  I would say it helped a bit but it is still unusable.

Should I suspect intonation issues next or ?

Is the community comfortable enough that the alt tuning *should* be fine and it must be my guitar?

[Elantric]

Roland/Boss emphasizes the importance of proper guitar setup and polished frets for best alt tuning performance on prior VG-99, GR-55 owners manuals -same applies to GP-10

When my Alt tuning is crucial,  I sometimes play slide , and I will tune the actual strings to open E ( EBEG#BE), then let GP-10 DSP tune the strings to normal tuning ( EADGBE) when im not playing the slide solo

[Brak(E)man]

Thank you!  Had to go out of town but finally tried this today.  I would say it helped a bit but it is still unusable.

Should I suspect intonation issues next or ?

Is the community comfortable enough that the alt tuning *should* be fine and it must be my guitar?

I have Alt tune warbles on GP-10 (see thread if your interested)

https://www.vguitarforums.com/smf/index.php?topic=13752.0

https://www.vguitarforums.com/smf/index.php?topic=18614.0

Boss fixed the problem on SY-1000 but not on GP-10

but never experienced out of tune with alt tune though.
I'll try the tuning this Monday.

[Kevin M]

You might try to record something to ensure you're not hearing the real strings on top of your alt-tuned model.

[gumtown]

A recording "direct" from the outputs, not via acoustic mic.

Check normal pickups are not being mixed in the signal (NPU Off).

[Brak(E)man]

the tuning works fine for me.

[larryaz]

Thanks for confirming and everyone for your suggestions.  Haven't had time yet to evaluate intonation or make sure I'm not hearing the 'real strings' but will report back when I do.