Trikbox Flo Rida Stutta

[Kipper4]

Just another super simple Tremolo using the Stompflo lfo.

I havent tried other jfets but it's likely some common parts may work as well.

[deadastronaut]

cool,  have you tried a tempo match test with metronome with this tappy thingy?

whats the max time it can do?

[Kipper4]

Max time is approx 10 secs. Not really stutter at that setting though.

I did try a metronome test and yer it's all good mate. I struggled to keep up at around 180bpm.

Data sheet says

0.05hz to 25hz

Handy dandy link coming up.

https://electricdruid.net/datasheets/STOMPLFODatasheet.pdf

[Kipper4]

https://youtu.be/rQmkkkVrhfQ

[duck_arse]

I'm soon to off and see if the links werk, but in the meantime - aren't you biasing your jfets anymore?

[Kipper4]

Nice one Stephen.
I forgot to add it to the drawing.
Sorted now. Carry on.

[Danich_ivanov]

Another cool one! Although yes, this jfet needs biasing, also there's no depth control, which however could be accomplished by simulating (not sure if this is the right word for this occasion) the biasing resistor by using a pot instead.

[Kipper4]

A depth control is possible. Make R3 a pot like the others.

See here.

http://www.diystompboxes.com/smfforum/index.php?topic=120023.0

I haven't tried this.

Should I bias the top jfet ?

[ElectricDruid]

Max time is approx 10 secs. Not really stutter at that setting though.

I did try a metronome test and yer it's all good mate. I struggled to keep up at around 180bpm.

Data sheet says

0.05hz to 25hz

Handy dandy link coming up.

https://electricdruid.net/datasheets/STOMPLFODatasheet.pdf

I'd just like to say that the frequency range available from the Freq control knob is wider that that available from the Tap Tempo button/footswitch. The tap tempo timer times out after 4.19 seconds, so about four seconds is the slowest you can tap. The knob goes down to 0.05Hz which is a 20 second cycle. The fastest you can tap depends on you having a fast finger and enough coffee in your system to kill a bull rhino - there is no upper limit on tap speed, but there's probably a point at which stuff starts going a bit weird.

A single tap on the tap switch resets the waveform to the start of the wave (usually the top) which lets you keep the thing in time if it starts to drift out (or the band does). That's why having it time out after 4 seconds is handy.

Tom

[Danich_ivanov]

Yes, q2.

I know that it is possible, i'm just saying that since it doesn't have a depth control, and it also doesn't have biasing on q2, it would be fun to make it that way and solve two issues at once. Totally not necessary though, just an idea that comes from my experience with similar setup.

[Mark Hammer]

Question: Do pedals we describe as yielding a "stutter" effect use something other than a 50% duty cycle?  That is, in using whatever LFO waveform they employ, do they spend more time "off" than "on"?

I ask because I'm wondering if there is anything qualitatively different between what we describe as "tremolo" and what we categorize as "stutter", or is it simply a matter of modulation depth (i.e., not merely a rhythmic reduction of amplitude, but a complete rhythmic shut-off)

[ElectricDruid]

Question: Do pedals we describe as yielding a "stutter" effect use something other than a 50% duty cycle?  That is, in using whatever LFO waveform they employ, do they spend more time "off" than "on"?

I ask because I'm wondering if there is anything qualitatively different between what we describe as "tremolo" and what we categorize as "stutter", or is it simply a matter of modulation depth (i.e., not merely a rhythmic reduction of amplitude, but a complete rhythmic shut-off)

I dunno how other people feel about it, but I would characterise a "stutter" as a faster effect with a sharper transition from on to off (e.g. a pulse waveform of some type, or maybe something vaguely trapezoid) and definitely a deep effect that goes to completely off or very close to it, whereas a "tremolo" is typically slower and would use a smoother waveform like a sine or triangle with a more variable depth that could potentially be fairly mild.
There's a point at which these two definitions start to meet and merge though, as there often is.

Tom

[Mark Hammer]

Yeah, I imagine it is a bit like the relationship between chorus and flanging.  There is a zone where they are very similar to each other, in addition to ranges where they are clearly audibly different beasts.

But the reason for my question was that, at 50% duty cycle, even square-wave modulation sounds like "modulation", rather than a stutter.  I'm just wondering if the obviousness of the stutter effect - in a way that gets it perceived as such, rather than confused with something else - bears some relation to duty cycle.

I suppose the other aspect that gets such modulation mentally classified as "stutter" is that it occurs in bursts., rather than some ongoing effect, such as when some players use rapid movement of the toggle on their LP or SG as an effect.