Tone Matching - What do you play and for how long?

[sheky]

I am tone matching my amp head using a load box and Di (using the live mode).

I don't know what to play. A few chords? Single notes? Palm muting? Is it more accurate the longer I play? I noticed that if I play for a long time, like 30 seconds or longer, the graph in the config tab flattens out as if it's been smoothed which leads me to believe I'm losing accuracy the longer I play.

If I tone match on the bridge pickup would I need a separate tone match for the other pickups? How about different guitars?

Thx!

 

[GlennO]

The choice of guitar or pickup doesn’t matter as long as you use the same both times. The important thing is to play the exact same thing both times. A sine sweep or broad band noise works well, but if you use a guitar, play a wide range of notes up and down the fretboard. usually 5-10 seconds is sufficient.

 

[sheky]

The choice of guitar or pickup doesn’t matter as long as you use the same both times. The important thing is to play the exact same thing both times. A sine sweep or broad band noise works well, but if you use a guitar, play a wide range of notes up and down the fretboard. usually 5-10 seconds is sufficient.

I'm using 'live' mode so I only have to play one time. Is the sine sweep more accurate?

Thx!

 

[GlennO]

I don't think there's a "best" source for all situations. For me, sometimes a guitar works better, sometimes not.

 

[sheky]

How do you generate the sine wave? Can I use the synth block?

thx again

 

[yyz67]

How do you generate the sine wave? Can I use the synth block?

thx again

Yes. Or you can use pink or white noise as well (no "sweep" required).

EDIT: Or all at the same time

 

[sheky]

I've been testing this out and I find I get a different result whether I use pink noise or white noise. If I let the noise run more than an instant before matching, the curve in the graphic totally smooths out. Here is the result for white noise after 5 seconds. It's totally smooth curve.
Playing with the Averaging time in the config page doesn't seem to matter.



Here is the curve when running the noise for 2 seconds - it's a little more defined but still looks very wrong -



And if run the tone match for under a second before Matching, I get a more defined curve



This curve looks different than when I run the same test on pink noise but I think that's enough images .

This also happens when playing guitar, if I play too long, the curve becomes totally smooth. what am I doing wrong?

thx.

 

[GlennO]

The simplest explanation would be that matches your reference.