Parameter locking a step?

zthee

So let's see if I got this right - If I have a sequence running with step 1,3 and 7 active and I'd like to tune step 3 differently - I'd hold down step 3 and it starts to blink, selecting OSC and then turning the COA knob tunes not only step 3, but all other steps as well? To get it step 3 to be different I have to release it and then turn COA back to where it was before so that 1 and 7 sounds like they did before I tried to lock step 3?

Or am I doing something wrong? My assumption would be that when step 3 blinks turning COA will only affect step 3, not the other steps?

julian

Yes, I also noted this currently.
I've added it to the todo list.

macMOE

When you just want to alter the tune of a drum it's easier to go to the step edit mode, press the step you want to change and turn the Note parameter.

julian

There is also a difference between modulating osc frequency and the note parameter.
Osc frequency only changes the freq of a single OSC, while the note value controls the frequency of all oscillators. the osc coarse/fine parameters are an offset to the note value.

macMOE

true, I didn't think of that.

While we're at it, is there a way to determine the actual Note played ?

toneburst

The numbers are MIDI note numbers, I believe (correct me if I'm wrong, Julian). There's a chart of numbers to notes here:

http://www.midimountain.com/midi/midi_note_numbers.html

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macMOE

Ahh, ok. So i just have to add the note and the coarse value and the outcome corresponds to that chart?

toneburst

@macMOE I believe so. Julian?

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julian

in principle this is correct, but there could be a certain offset X due to late night coding
But both parameters are measured in midi note numbers, that is correct.

admviolin

another AHA moment!  I've been tuning patterns just with the coarse tuning parameter.  Most of the time it does what I want....not always.  

toneburst

@julian Ah, soo.. to get the correct notes, you'd need to set the Course Tuning to 63, then set the note number step parameter to the note you want, otherwise the notes will be offset? Or not?

Am I correct in assuming that if the pitch is swept down, it eventually arrives at the pitch as set by the tuning and note parameters? I guess if the pitch-sweep of a sound doesn't complete before the sound decays, then you won't get the correct note.

Will any accidental offset be corrected in a future firmware update, I wonder?

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julian

okay I looked it up in the sourcecode:

int16_t note =  (osc->midiFreq) + (baseNote);

where
osc->midiFreq = Coarse tune
and
baseNote = MIDI Note (step parameter note nr)

As an explanation:
The step note nr is the offset value.
If step note is 0, only the coarse/fine value is used.
The Coarse tune is in MIDI note numbers similar to this table
http://www.zem-college.de/midi/mc_taben.htm
with A440 Hz at note nr 69.
Fine tune is +/- 50 cents

toneburst

I see, thanks for the explanation, Julian.

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