Tasty Chips Electronics Integral Bedienungsanleitung
Tasty Chips Electronics
Integral
User manual
© Tasty Chips Electronics 2022-2023
Document version
Document version 2.2.a
Applicable firmware version 2.2.x
1
Introduction
Integral is designed to offer high quality true-stereo convolution reverb in a compact package, for use with
guitar or line-level sources like synths or even mixers.
Aside from being able to accurately recreate acoustic spaces, Integral has ample potential for creative sound
design by allowing the user to stretch and manipulate the impulses, and load external impulses from a USB
stick. Impulses can be directly recorded to the unit and instantly audited, and an expression pedal input is
provided to give hands free control over parameters.
2
Table of contents
Introduction 2.
Warranty 4.
Getting started 4.
Signal path 5.
Understanding the display 6.
Using the envelope controls 7.
Using the remaining parameters 7.
Shift functionality overview 8.
Using the dual convolvers 9.
Expression pedal 9.
Choosing samples 10.
Recording responses 11.
Presets and system settings 11.
System menu 12.
Firmware update s via USB 13.
Firmware installation failsaf e 13.
Recommended hardware 14.
Troubleshooting 15.
Features 15.
Credits 16.
Contact 16.
3
Warranty
The Integral comes with a 1 (one) year warranty on factory defects. Warranty is effective from the date of
shipping of the unit.
“Factory defects” covers
- Broken parts (for instance cracked screen, broken buttons, or knobs)
- Non-functional unit (“dead on arrival”)
- Semi-functional unit with serious defects (for instance inability to access the USB stick, mute audio inputs
or outputs).
In case of such defects, you can reach us at info@tastychips.nl, and claim your unit to be repaired. We’ll
contact you with all the necessary information for return shipping and will refund all postage costs incurred.
Please understand that shipping and repairs may take several weeks depending on the severity of the defect
and your location in the world.
We’ll first attempt to repair your unit. If, and only if, the unit is damaged beyond repair, we’ll send a new unit.
Getting started
1. Connect the Integral to a 9 or 12 volt power supply that supplies at least 500 mA.
2. Hook up audio output cables.
3. Press Play [►] to test the output of the selected response.
4. Press Play [►] again to stop the test.
5. Hook up the audio input. If you are using a mono input, use the L input.
6. To begin with a blank slate, make sure the Predelay is completely 0, Xfade is centered, and Wet is
maximized. The Pos knob should be 0. The Attack setting should be 0, and Release should be
maximized, enabling the full response to be used.
7. If used with a line level source or in an effects-loop, press the line/inst switch in to prevent clipping.
8. Press the A or B footswitch and enjoy the reverberated sound!
9. Turn the Select knob right to try the next response.
4
Tip: The Integral accepts both center negative and center positive DC power supplies.
Signal path
As you can see the two internal convolvers both have their own processing chain PRE for predelay, a high-
pass filter, and followed by a Mid-Side matrix (aka stereo width on the front panel).
The bypass footswitches switch the signal going into the convolvers, leaving the tails to fade out naturally
when you switch them off. With a pair of quick taps you could apply the effect to just one phrase for example.
Predelay delays the signal going into the convolver, this has the dry signal appear more forward compared to
the convolution product, allowing you to make small spaces sound bigger and create clarity in dense reverbs.
The high-pass filter is typically employed to keep bass and sub-bass from blowing up. Combining a bass-
heavy input with a bass-heavy response sample often calls for such a feature.
Mid-Side is used to exaggerate or diminish stereo effects in the input signal. It may be used to turn it
completely mono, or amplify the width. Even with mono input you can still widen the stereo image, if your
response is stereo.
The convolution chain is followed by wet attenuation. Finally, the convolver outputs are crossfaded and
summed with the dry signal.
5
Tip: On the high end of its range the width pot may boost the apparent volume slightly,
you might need to adjust the wet knob accordingly.
Note: Only one convolver is controlled by the knobs and buttons at any one time.
Understanding the display
After startup the Integral will show the main screen most importantly sample waveforms and control values.
The display shows the response sample in a straightforward way, along with its name at the bottom, and an
action message at the top. Such an action may be “WET -6.0DB”, “ATTACK 0.500s”, “CONVOLVER A”. So
either value updates, or discrete actions.
The display shows either convolver A or convolver B. You can see a blue “A” or an orange “B” near the upper
right corner of the screen. Either push the Select knob to toggle between the two, or press the corresponding
footswitch to toggle which convolver is controlled by the knobs.
The display shows up to 4 sample channels. Everything you need for true stereo reverbs. From top to
bottom, these are
If a plain stereo sample is loaded instead of a 4 channel sample, only two channels are visible. Why these 4
channels? This is for the so-called stereo matrix. The left input can also influence the right output and vice
versa.
The samples are displayed at full length, and the amplitude is logarithmic so that details in the reverb tail
may be better visible. Between the channels the difference in amplitude is exaggerated. This quickly tells you
if the response is off-center.
The overlaid blue lines show the AR (Attack-Release) envelope.
Near the upper-right corner of the screen you may see a red “C” appear from time to time. This indicates the
total wet signal is clipping or almost clipping. The Integral then automatically limits the gain, you may want to
attenuate the wet signal, or switch between the line and instrument input modes, depending on the situation.
On the bottom of the display the current sample filename is displayed.
6
Using the envelope controls
An attack-release type envelope allows attenuation of parts of the response sample. The start position (time)
of this envelope can be set using the “Pos” knob. Setting the position will completely skip over any sample
data that comes before this position in the response sample. The combination of these three knobs allows
you to precisely focus on any specific part of the response, for instance the tail, or only the early reflections.
The position control has a precision of 1024 steps. The Release and Attack [ + Release] settings have the
same resolution, and using their exponential control curve you can achieve very short attacks or releases
and still accurately control them. The attack and release time are displayed on screen down to milliseconds.
The applied envelope attenuates the response in places. To have no attenuation at all (to actually disable the
envelope’s function) turn Attack and Pos to 0, and turn Release to its maximum. Note that the Integral uses
normalization after applying the envelope. This will preserve signal power, however it can also significantly
boost the wet signal. You can compensate by turning down the Wet knob.
Note that when attack is non-zero, you may experience a gap in the audio. Each time the envelope is
changed the convolver recomputes and restarts. Since a longer attack will result in low volume, you may
hear short gaps in the output as you continue to change the envelope. This can be compensated by
increasing Slew. See the section “Using the remaining parameters” for more information on that.
Using the remaining parameters
Predelay: 0-2.0s in with an exponential control curve. Using this often influences the perception of the size
of a reverberating space. For instance, you can make a short reverb of a small room appear bigger by
turning this up a little. Adjustment of this control causes the convolver to recompute its data. This may take a
short while. Also note that the convolver restarts after adjustment and it starts with playing back the delay.
Highpass filter cutoff [⇧ + Predelay] To keep the convolution from blowing up you can cut away some low
frequencies from the audio input. The high-pass is a 12dB per octave filter with a full range of 0 to 20000
hertz, and an exponential sweep gives fine adjustment in the lower frequencies.
Stereo width: This is a Mid-Side matrix control that either turns the input into mono (turn it down to 0), or
exaggerates the stereo effect (turn it completely right). The center keeps the stereo input audio signal exactly
as it is.
Pitch [⇧ + Stereo width] Hold down Shift and turn the Stereo width knob to pitch bend just the impulse
response. This does not change the pitch of the convolved signal itself, but changes the timing and formant,
and allows you to tune resonator-style impulses. Completely left means -2 octaves, completely right means
+2 octaves. Center keeps the response the same pitch.
Xfade: Crossfade between convolver A (left on the knob) convolver B (right on the knob). Please read the
section “Using the dual convolvers” for more information.
Slew time [⇧ + Xfade] recomputation slew time controls the crossfading time between newly computed
response and old response. Such a cross fade occurs when a new impulse response is offered to the
convolver. For instance when a new response is selected by turning the select knob, or when the envelope
or envelope position is changed. A short slew time sounds more choppy, but you’ll hear the new response
faster. A larger slew is especially useful with longer envelope attack.
7
Shift functionality overview
Knob/Button: Normal function: Shift function ⇧]:
Width Knob Stereo width Impulse pitch
Xfade Knob Convolver crossfade Slew Time
Predelay Knob Predelay time High pass filter
Release Knob Release time Attack time
Wet Knob Wet level Dry level
Encoder Push Swap convolver System menu
Encoder Turn Prev/Next impulse Prev/Next folder
Play Button Preview impulse Preview impulse with processing
(Width, pitch & envelope)
Footswitch A Toggle Convolver A Record
(Press again to stop recording)
Footswitch B Toggle Convolver B Store
(Hold to save preset)
8
Using the dual convolvers
The Integral runs two internal convolvers simultaneously. There’s one in the foreground, which is directly
controlled by the knobs, and there’s one in the background. The background convolver is not currently
controlled by the knobs, but holds another response sample and it has its own (static) settings such as
another envelope, filter settings and pitch, but it can be controlled via expression pedal if you choose. For
this see the “Expression pedal” chapter.
The Xfade (crossfade) knob creates a mix between the two convolvers
1. Set up your foreground convolver using the “select knob” to choose a response, and turn the other
knobs (except crossfade) until you have a satisfying convolution.
2. Now press “select”. This switches the foreground convolver into the background. The display will let
you know “CONVOLVER B”
3. Turn Xfade to the left a bit to hear the convolver A, and to the right for convolver B.
4. Select a nice new response sample for convolver B by turning “select”, and set the parameter knobs
to your liking.
5. Wiggle Xfade. If you’re using reverb responses, you are now traveling between spaces!
E pression pedal
The Integral accepts a standard expression pedal to provide hands-free control over a chosen parameter.
You need a TRS expression pedal with a linear sweep and a resistance of at least 10 kOhms. Please read
the “System menu” chapter for more information.
9
Tip: You can toggle between the two encoders by pressing the Select encoder, but you
can also simply press the A or B footswitch to control the corresponding convolver.
Choosing samples
The Integral offers a file chooser to help you browse through vast libraries of samples and settings. All
samples and settings are present in one big list, through which you can quickly scroll back and forth. No
diving into directories, no choosing of data types to load. Turn the Select knob to enter the file chooser
screen. Turn a bit more to start choosing another sample.
The Integral’s USB port allows you to use a USB stick or Micro SD card (via a USB-SD adapter). It also
comes pre-loaded and with loads of original responses recorded by the Tasty Chips Team and others, there
are over 60 samples in the Integral’s internal flash memory.
Once a USB drive/SD card is inserted the Integral will automatically register all the.wav files in the root
directory, and in the folders in the root directory. Note that it does not scan any deeper than 1 level! This
means that folders in folders are skipped. It slurps up all the sample file names and compiles them into a big
list you can scroll through. It may take a few seconds before the Integral has correctly mounted and
processed all the files. It accepts USB sticks formatted in FAT, ExFat, and Linux Ext filesystems.
If there are a lot of responses on the USB drive/SD card, you may want to hold down Shift [] when turning
the Select knob. This jumps from folder to folder instead of from file to file. While browsing, the ECR shows
the current folder at the top of the screen. This also helps you to distinguish if samples are in internal
memory or are external.
Browsing automatically loads and activates new samples. When Play [►] is active, you can easily preview
sounds this way. In the top left corner it also shows A or B to tell the user which convolver’s sample and/or
preset we’re loading.
When you have selected a sample you like, return to the main screen by pushing Select, or wait for 4
seconds if you have the AUTO EXIT feature enabled in the menu. For this read the “System m enu ” chapter.
Some files are shown in blue. This means they’re accompanied by an .ini file, with patch data inside. Push
and hold the Select knob to load it. These patch files are created when you save your system presets.
Please read the section “Presets and system settings” for more information on that.
10
Note: The Integral will accept impulses of all commonly used samplerates, however it’s
advised to use the Integral’s native samplerate of 48k, as this will load the quickest.
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