by fredo Mon Jun 22, 2015 3:11 pm
Hi guys !
Just a quick reply with the information I have regarding delay time and tap tempo.
First of, have a look at H&K's blog post about MIDI :
http://blog.hughes-and-kettner.com/128-ways-midi-will-change-your-life-as-a-live-guitarist/If you look in the comments there are several questions about tap tempo and some answers by H&K.
Basically delay time value is set by CC#4 with midi values ranging from 0 to 127 (MIDI protocol limitation) mapped to actual time values on the GM 36 ranging from 50ms (or is it 80ms?...) to 1360ms (according to the manual) with 10ms steps.
So in order to use an external MIDI controller with tap tempo you need to be able to tell that device that the min value of the FCB delay is 50ms and the max is 1360ms so that it can compute the appropriate MIDI CC value.
Unfortunately, not all MIDI controllers can do that :-/...
The FCB1010 (which is mentioned in H&G blogpost comments) basically maps tap tempo values raging from 0ms to 1270ms, which is quite close to the GM36 range (50ms to 1360ms) and should give a pretty accurate delay time values.
Now for the Line6 devices, I'm not sure what they are capable of in that area, but the comments on the blogpost don't look very promising...
Now for CC#36 used by the FSM, according the the MIDI implementation chart, it's the delay time LSB value, which must give more accuracy the the delay time values generated by the FSM.
Hope this helped !...
Regards,
Fredo.