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4ms Dual Looping Delay, Руководство пользователя

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for example.

Special Features

Windowing aka Scrolling aka Scrubbing

When 

Infinite Hold 

is on, the 

Feedback

 and 

Delay Feed

 parameters have no meaning 

since they are effectively at 100% and 0%. However, the 

Feedback

 knob and CV jack have 

been given a special purpose when 

Infinite Hold

 is on: Windowing, also known as 

scrolling or scrubbing.
To use this feature, hold down the 

Infinite Hold

 button while turning 

Feedback.

 This will 

cause the start and stop points of the loop to scroll forward or backwards, depending on 
which way you turn 

Feedback

. The amount they scroll is determined by the amount you 

turn 

Feedback

: one full turn of the knob equals one loop length. So if you have a 2 second loop, then turning 

Feedback

 from 

0% to 100% will shift the loop forward by two seconds. Turning 

Feedback

 from 100% to 50% will scroll the loop backwards by 

one second. 

Note: Windowing only works when 

Infinite Hold 

mode is on.

Windowing Tutorial

Let's try it. First get set up: Set 

Time

 so you have a loop length that's about a second or so. Keep 

Feedback

 low to keep 

things simple for now. Play some sounds for 10-20 seconds and then turn on 

Infinite Hold

 to lock them in. 

Listen to your loop, pay attention to what sounds the loop starts with, and what sounds it plays right before it repeats. These 
are your loop start and stop points. Now, we're going to change those start and stop points by Windowing:

1.

Turn 

Feedback 

knob all the way up (the sound will not change).

2.

Hold down 

Infinite Hold

 while you turn 

Feedback 

to 0%.

You just shifted the loop backwards by one whole loop length. Let it play for a bit as you listen to the new start and stop 
points. Hear it? The loop is the same length (same timing/tempo), but now it will be playing the sounds you recorded one 
second earlier. Play with this some more: Press and hold 

Infinite Hold

 again and turn 

Feedback

 back half a turn. Hear how 

the loop now starts in the middle? Remember that turning 

Feedback

 has no effect unless you're holding down 

Infinite Hold

. 

This is critical for the next tip:

Tip #1: 

If you want to scroll more than one loop length, do this maneuver:

1.

Turn 

Feedback

 to 100%.

2.

Depress 

Infinite Hold

 and turn 

Feedback

 to 0%.

3.

Release 

Infinite Hold

.

4.

Repeat as needed (turn Feedback to 100%, then press Inf and turn Feedback back to 0, release Inf...)

Tip #2:

 If you want to scroll back very far even more quickly than Tip #1, change the Time parameter to very long (perhaps flip 

the time switch up to +16). Since turning 

Feedback

 + 

Infinite Hold

 scrolls by 

one loop size

, making the loop size enormous 

lets you scroll by enormous amounts with just one knob twist! You can scroll back a maximum of 2 minutes 54 seconds.

Tip #3: 

Set Time to a very short period and window around a loop with CV for a sort of granular effect.

Using CV with Windowing

The Feedback CV jack also allows you to window using external CV control. To enable the CV jack, you must first manually 
hold down 

Infinite Hold 

and turn 

Feedback

, even just a small amount. The 

Feedback

 CV jack will now control the window.

If you turn the 

Feedback

 knob at any time without holding down 

Infinite Hold

, the 

Feedback

 CV jack will no longer control 

the window.

Unquantized Time Mode

 and 1V/oct CV

Both channels of the DLD are always linked to a common time base. Normally the 

Time

 

knob and CV are quantized to integer amounts (1-16), and simple fractions (1 – 1/16). This is 
called 

Quantized Time Mode

, and is the default mode. It's possible to change to 

Unquantized 

Time Mode

, where the knob and CV provide continuous control of the Time parameter (not 

quantized to integer or simple fractional amounts)
To change modes is simple:

•

Unquantized Time Mode: 

Turn 

Time

 knob 

while

 holding down the 

Infinite Hold

 button

•

Quantized Time Mode:

 Turn 

Time

 knob 

without

 holding down the 

Infinite Hold

 button

In 

Unquantized

 mode, the 

Time

 knob behaves as usual, except it does not snap to the whole numbers between 1 and 16. So 

you can sweep a slowly changing tempo, or set an exact tempo in between two integer amounts. To adjust the 

Time

 knob in 

Unquantized 

mode, hold down the 

Infinite Hold

 button down while you turn the 

Time

 knob. 

The 

Time

 

CV

 jack behaves differently in 

Unquantized

 mode: It responds over a 1V/octave curve for positive CV (5 octave 

range). Applying up to +5V will multiply the 

Time

 knob's setting in an exponential curve relative to the voltage. That is, for 

every additional volt on the CV jack, the Time period will halve. This is the opposite response as 

Quantized 

mode, where 

additional voltage makes the period increase. The 1V/octave response in 

Unquantized 

mode is very useful for resonant 

delays. 

Note that if the Time switch is up, the 1V/oct response will be altered by the addition of the extra 16 bars. For a true 1V/oct 
response, keep the Time switch centered or down. You also can adjust the exact 1V/oct tracking in System Settings.

7

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Содержание Dual Looping Delay

Страница 1: ...essly with modular timebase and sequencing devices such as the 4ms Quad Clock Distributor QCD etc Two channels each with nearly 3 minutes maximum delay loop time at 48kHz 16 bit option for 24 bit Extremely quiet low noise low jitter design Stereo cascading or dual independent mono use Delay and loop time is sync able to a clock or a division or multiplication of a clock Infinite Hold mode for loop...

Страница 2: ...utput Buffer can be cleared with a button press 20HP Eurorack module Controls and jacks Channels A and B are identical and separate except for the common clock and audio normalizations Controls Ping button Tap a tempo to set the base clock one beat Base time can also be set by an external clock Time knob per channel sets the loop time in number of beats Ranges from 1 to 16 Time switch per channel ...

Страница 3: ...g jack The VCO should be in the low or mid audio range less than 2kHz 250 500Hz is ideal Feed a signal into the In jack noise works well so do triggers 10V triggers will resonant more 5V triggers are barely enough to trigger the resonance Use the Time switch and knob to set the Pitch Feedback sets the resonance which determines the amplitude of the pitch and Delay Feed effects the level and resona...

Страница 4: ...y the Ping button or jack Each channel can multiply divide or add to the base time by using the Time knob switch and CV Anytime the base time is changed by tapping the Ping button or changing the external clock both channels will instantly change tempo while maintaining the same ratio to each other Channel normalizations The main In A jack feeds into the switch tab of the main In B jack Therefore ...

Страница 5: ...de in portions of the signal onto the loop The knob and CV jack are added together and have a maximum combined value of 100 Negative voltage on the CV jack is ignored Note that in Inf Hold mode Delay Feed has no effect since there is no recording Feedback Also known as regeneration echo amount and other names feedback is a common feature on delay effects Feedback is the amount of signal read from ...

Страница 6: ...ily The loop is more dynamic and mutable versus when Infinite Hold is on the loop is more static and immutable Reverse Reverse reverses the direction that memory is read and written Pressing the Reverse button toggles Reverse on off when the button is released If you turn a knob while Reverse is held down the Reverse action will be cancelled this is because holding a button while turning a knob is...

Страница 7: ...oll back very far even more quickly than Tip 1 change the Time parameter to very long perhaps flip the time switch up to 16 Since turning Feedback Infinite Hold scrolls by one loop size making the loop size enormous lets you scroll by enormous amounts with just one knob twist You can scroll back a maximum of 2 minutes 54 seconds Tip 3 Set Time to a very short period and window around a loop with C...

Страница 8: ...atch a manual CV source into the Delay Feed B CV jack It can be a Pressure Points or an FSR pressure output or perhaps an envelope output that s triggered manually When you press on the Pressure Points or FSR you will bring up the Delay Feed parameter which causes audio to be recorded onto the loop Since Feedback is at 100 the loop is infinite and everything you lay down will remain but take care ...

Страница 9: ...k and use the Mix A knob to blend between the dry signal and Channel A s delay Reverb y echo room Patch as shown on the left Try setting one channel s Time to a fast delay such as 1 with the Time switch flipped to 1 8 Set the other Time to a slow delay such as 8 Set both channel s feedback amounts to around 75 90 Take the output from Out B Tap a very fast tempo as fast as your finger will go While...

Страница 10: ...ts Feedback with External Processing The classic use of Send and Return ports in a time delay processor is to provide a side chain for modifying the delayed signal before it is returned to the input mix Probably the most classic application of this kind of side chain processing is a simple low pass filter in the feedback path This causes succeeding repeats to soften with less high frequency conten...

Страница 11: ...e reset it back to the start and tap Reverse A button to reset The Hold A button should light up Play the file from the beginning again 6 If the file loads successfully the DLD will immediately start running In some cases you may need to do a Factory Reset see Factory Reset section Estimated late June 2016 the open source licensed source files in C for compiling with gcc arm can be found at https ...

Страница 12: ...pulse width In this mode the loop lights and Ping light will each blink once in sequence A short flicker means the associated jack is in trigger mode and a longer blink means it s in gate mode The associated button will also be lit to indicate gate mode or unlit to indicate trigger mode Gate Trigger output for Loop A jack Tap Reverse A to toggle mode Gate Trigger output for Loop B jack Tap Reverse...

Страница 13: ...switches up hold down all five buttons for 8 seconds Calibration Mode Your DLD has been calibrated at the factory and should not need re calibration Hardware hackers should be aware that the calibration data is stored in FLASH memory at 0x08004000 to 0x08007FFF If this sector is erased the DLD will automatically re calibrate itself on boot Make sure nothing is plugged into any CV jacks the first t...

Страница 14: ... disabled Clock outputs Main Loop A Loop B 0V to 8 2V 2 4µs maximum jitter i e 0 001 at 120 BPM Rise or Fall time 1µs Pulse Width Trigger mode 22ms Gate mode 50 square wave At clock speeds faster than 22Hz the clock output becomes 50 duty cycle Sampling 24 bit sample at 48kHz 32 bit processing 16 bit storage in RAM 256Mbit nonvolatile SDRAM chip for a maximum of 2 minutes 54 seconds per channel 6m...

Страница 15: ...t Gate Triggers for clock outputs Dim the loop LEDs Re assign Delay Feed CV jacks to Mix Enable disable auto mute and soft clipping Adjust 1V oct tracking No clicking when doing a Reverse or exiting Infinite Hold mode Exiting Infinite mode quickly crossfades to play from the beginning of the loop Fixed the loop lights so they display better at high speeds 15 ...

Страница 16: ...16 ...

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