From Brian Willoughby Sent Sun, Feb 4th 2018, 21:49
From Brian Willoughby Sent Sun, Feb 4th 2018, 21:49
Interesting! Looks like it=E2=80=99s a 5th; 2/3 of the osc. They must be = using a PLL or a counter to get a non-power-of-two interval. In fact, = they=E2=80=99re probably using a counter, because that could provide the = standard -1/-2 octaves. A gate or two could provide the 25% pulse at -2 = and the 5th could be an alteration of the counter reset input logic. On Feb 4, 2018, at 1:40 PM, Niall Munnelly <xxxxx.xxxxxxxx@xxxxx.xxx> = wrote: > The Elektron Analog 4 offers a suboscillator turned down a fifth (or = maybe it=E2=80=99s down an octave + fifth). It=E2=80=99s effectively = frequency/1.5 or /3, right? >=20 > On Feb 4, 2018, at 4:31 PM, Brian Willoughby <xxxxxx@xxxxxxxxxxxx.xxx> = wrote: >> This is the nature of a sub oscillator. The circuitry needed to = produce a square wave that is one octave below its input is very small = and cheap. So cheap that adding the entire circuit again to produce two = octaves down is quite easy. >>=20 >> The drawback is that the shape is square and the pitch is not = independent. The shape can be altered with filtering or other additional = circuitry, but then you start getting to the complexity of a full = oscillator. By the time you make it completely tunable, you no longer = have a sub osc, but a complete osc - perhaps with sync input. >>=20 >> Unless I=E2=80=99m missing something, you won=E2=80=99t find a sub = osc on any synth that is tunable. Maybe it could provide -3/-4 octaves, = but not arbitrary intervals. It simply has a different name at that = point. >>=20 >> On Feb 2, 2018, at 8:07 AM, Justin Maxwell <xxx@xxxxxxx.xxx> wrote: >>> The Avalon has a sub osc but it isn't tuneable beyond a -1/-2 oct = toggle >>=20 >=20