|
|
Post by feijai on Oct 25, 2023 22:17:28 GMT
I've been trying to make my way through some questions regarding B. Stop and B. Start.
First, I'm wondering what value is of *both* B. Start and B. Stop on Triq164, SEQ16, etc. The Triq164 doesn't have any way to start or stop: it just responds to clock steps. So you could hook up B. Start to reset I guess. But B. Stop? What purpose would it serve on this module? I can' t think of any. Perhaps it would have been better to just have B. Start, and include a MUTE3.
Second, along those lines, does the MASTER I/O filter out CLOCK when it's outside of a START and STOP? In MIDI it's perfectly legal and indeed beneficial to pulse CLOCK outside of a START/STOP, to get devices warmed up to tempo. I'd hope MASTER I/O filtered CLOCK, so Triq164 etc. would only pulse after MIDI START.
Third, ideally a MIDI CONTINUE would not issue a B. Start, but *would* turn clock back on (if it's being filtered per previous question). Is this the case?
.
|
|
|
|
Post by solipsistnation on Oct 25, 2023 22:58:48 GMT
When I set up sequencers I patch either b.stop or b.start into the reset-- however, depending on how many modules are hanging off of that one bus line, you may see enough of a voltage drop that it no longer resets consistently. Without a buffered mult you get some weird behavior. Same with the bus clock (although in practice you send the bus clock to a divider of some kind and use that to drive the actual sequencers). Different modules may be differently sensitive to pulses below +5V on the various clock and reset inputs. I've got a thread about this somewhere.
The sequencers themselves all only respond to a clock. The bus start/stop is meant to be patched to reset. I'm about to go test whether the master sends clock if it's not bracketed by starts and stops and I'll post in a minute. (I've mostly stopped using the master clock output since the Heartbeat module came out-- it's more flexible overall.)
|
|
|
|
Post by solipsistnation on Oct 25, 2023 23:07:41 GMT
Okay. Here's the test:
MIDI -> MASTER r4
Unplug midi cable
start external sequencer
plug in midi cable
See what happens!
Result: It does NOT send clock if it doesn't get a START first.
Heartbeat module + expander, same deal:
It does NOT send clock if it doesn't get a START first.
But, the Heartbeat module has its own start/stop button, so if you do the same thing as above and then hit the start button, it does start transmitting clocks. If you change the tempo on the Heartbeat while MIDI is unplugged, then plug it in and hit start, the tempo pretty quickly adjusts to the MIDI tempo (there's some lag on the display, but I believe that's just the display and the module not counting properly while in use, and not actual clock skew.)
|
|
|
|
Post by feijai on Oct 26, 2023 7:50:47 GMT
When I set up sequencers I patch either b.stop or b.start into the reset B.Start, sure. But B.Stop? May I insert here the observation that though BEAT DIVIDER is called a "Midiclock Divider" on the Wiki, it does not properly divide MIDI clock (and similarly DIVIDER and The Great Divide), as they all divide by powers of 2, and in most cases MIDI clock requires a division by 6.
MM-DIV can do it. And I presume HEARTBEAT works fine.
It's good to hear that clock is being filtered without a START. Any way you might be able to test for a CONTINUE? Usually it's issued by pausing and then unpausing on your clock source. Ideally a CONTINUE would cause the MASTER I/O to resume clock but *not* issue a B. Start.
|
|
|
|
Post by pt3r on Oct 26, 2023 10:02:43 GMT
The Great divide is just a voltage dividing ladder not a clock divider.
|
|
|
|
Post by feijai on Oct 26, 2023 10:13:59 GMT
The Great divide is just a voltage dividing ladder not a clock divider. Ah, my apologies Kurt. |
|
|
|
Post by solipsistnation on Oct 26, 2023 15:26:11 GMT
May I insert here the observation that though BEAT DIVIDER is called a "Midiclock Divider" on the Wiki, it does not properly divide MIDI clock (and similarly DIVIDER and The Great Divide), as they all divide by powers of 2, and in most cases MIDI clock requires a division by 6.
The beat divider knob is labeled on the notes you get out of it, not the mathematical division. That is, 1/4 is quarter notes, not 1 out of 4 pulses. The wiki is a little unclear. The old (and now discontinued) DIVIDER module did it in the less useful way though, yep, and is now labeled "Divider (Binary Type)".
I'll experiment with midi continue when I have a couple of minutes to turn stuff on.
...I forget why I was patching in bus stop to reset. I THINK it was because I found some weird behavior with how the SEQ8 handled resets, but it's been a while and I may have been doing something weird then for some reason also now forgotten.
|
|
|
|
Post by feijai on Oct 26, 2023 16:43:12 GMT
I see. So the labels are note lengths, not divisions. This would be correct then? | Beat Divider Label | MIDI Clock Division | Dotted Division
| Triplet Division
| | 1/2 | 48 | 72 | 12 ? | | 1/4 | 24 | 36 | 8 ? | | 1/8 | 12 | 18
| 4 ? | | 1/16 | 6 | 9 | 2 ? | | 1/32 | 3 | ??
| 1 ? |
|
|
|
|
Post by solipsistnation on Oct 26, 2023 16:43:54 GMT
yeah, that should be correct.
|
|
