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USER GUIDE FOR VERSION 1.3 U-HE - HECKMANN AUDIO GMBH - BERLIN Introduction 3 the spirit of analogue _________________________4 loading presets ______________________________5 saving presets_______________________________6 editing _____________________________________6 programming 101 ____________________________7 Upper Panels 8 oscillators __________________________________8
  USER GUIDE FOR VERSION 1.3U-HE - HECKMANN AUDIO GMBH - BERLIN    Introduction 3  _________________________ the spirit of analogue 4 ______________________________ loading presets 5 _______________________________ saving presets 6 _____________________________________ editing 6 ____________________________ programming 101 7 Upper Panels 8  __________________________________ oscillators 8 ___________________ high-pass filters / feedback 16 ________________________________ main filters 17 _________________________________ envelopes 22 Lower Panels 24  _____________________________________ LFOs 24 ____________________________________ effects 25 _____________________________________ tuning 28 _____________________________ amplifier & pan 28 _____________________________________ voice 29 _________________________ clock & arpeggiator 30 ______________________________ modifications 31 __________________________________ trimmers 32  __________________________________ scope 33 MIDI Control 34Tips and Tricks 35Troubleshooting 38List of Modulation Sources 39  Introduction to get the most out of Diva, you will need a powerful computer    Diva is rather demanding in divine  mode, but that’s the price we pay to hear her wonderful voice in top form. If your computer stutters while trying out presets, switch the accuracy mode to great  , fast   or even draft  . You will soon learn which one your system can handle. Monophonic presets without voice stacking should be no problem, even on older computers. If your computer is fairly new, try the multicore  option which distributes voices between the CPU cores. You should generally render tracks to audio in the highest quality (set OfflineAcc   to best  ).This manual assumes that you know at least the basics of subtractive synthesis. If you have any queries and/or would like to join a lively discussion about Diva and other u-he products, feel free to post a message in our forum. install / uninstall Go to the Diva page, grab the appropriate installer, double-click on the downloaded file and follow further instructions.Diva is fully functional in demo mode except for an intermittent crackling which disappears as soon as the product is registered (by right-clicking on Diva’s data display and selecting the first entry).To uninstall, delete the plugin and all associated files from the following directories (these locations depend on the paths you chose during installation):Windows presets ...\VstPlugins\u-he\Diva.data\Presets\Diva\ Windows preferences  ...\VstPlugins\u-he\Diva.data\Support\ (*.txt files)Windows themes  ...VstPlugins\u-he\Diva.data\Support\Themes\ Mac presets MacHD  /Library/Audio/Presets/u-he/Diva/  Mac presets (User) [you]/Library/Audio/Presets/u-he/Diva/  Mac preferences [you]/Library/Application Support/u-he/com.u-he.Diva... (*.* files)Mac resources MacHD/Library/Application Support/u-he/ ( Diva/   and Themes/  ) online resources For Diva support and other u-he products, go to the u-he websiteFor a lively discussion about u-he products, go to our forum at KVRFor video tutorials and more, go to our youtube channelFor thousands of u-he presets (commercial and free), go to the patch library –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– the u-he team ãUrs Heckmann (code, concepts, design, discipline)ãClemens Heppner (more code, geek stuff, agility)ãSascha Eversmeier  (even more code, but different)ãHoward Scarr (presets, manuals, tutorials, grump)ãRob Clifton-Harvey (heavy metal support, everything else)with special thanks to...ãVadim Zavalishin and Andy Simper for their invaluable info about zero delay feedback filtersã Alexander Hacke and Hans Zimmer for lending us some very special analogue synthsãThe beta-testers and everybody who contributed presets (over 1200 using only the public beta)ãBrian Rzycki for keeping PatchLib up and runningãNathaniel Reeves of http://nkurence.com/ for kindly polishing the Diva logo TOC OSC HPF VCF ENV LFO EFX MODF TRIM ARP MIDI TIPS   3  the spirit of analogue Diva captures the spirit of various analogue synthesizers by letting the user select from a variety of alternative modules. The oscillators, filters and envelopes closely model components found in some of the greatest monophonic and polyphonic synthesizers of yesteryear.But what sets DIVA apart from other emulations is the sheer authenticity of the analogue sound. This comes at the cost of quite a high CPU-hit, but we think it was worth it: Diva is the first native software synth that applies methods from industrial circuit simulators (e.g. PSpice) in realtime. The behaviour of our zero-delay-feedback filters when pushed to the limit clearly demonstrates the advantages of this groundbreaking approach. about zero delay feedback filters Most filters in old analogue synthesizers have one or more feedback paths. The input signal passes through a series of controlled resistors and condensers, and the output is fed back into the input (or to another point within the signal path). The classic Moog™ ladder filter has four simple lowpass filter stages and a resonance control that determines how much of the signal is fed back into the input. This feedback loop doesn’t introduce any delay, feedback is practically instantaneous...Digital models try to reproduce this behaviour by calculating the result of applying four simple lowpass filters to an input sample. Feedback means repeating the current calculation using the results of the previous one.While real circuitry can process a signal within a few nanoseconds, digital models calculate per sample, adding about a million times as much latency to each iteration. The cumulative effect of feedback latency in digital emulations is very noticeable. Oversampling and higher sample rates help reduce the latency, but conventional digital filters always “smear” at high resonance levels.Methods of addressing the latency problem have been available for many years, but such implementations either don’t model the complex distortion inherent in real circuitry, or they aren’t suitable for realtime processing. Common to all methods is that they predict  output values and use that prediction in the current calculation.Of course we can’t see into the future either, but our routines are fast enough to deliver at least a few voices in realtime. We calculate the filter with a few test samples and look at the deviation between the prediction and the result, then we use that deviation to calculate a better prediction. The goal, of course, is to close the gap as quickly as possible!Diva applies a classic trial-and-error principle but includes a rather intelligent way (or so we like to think) of learning from mistakes. As a rule of thumb, Diva’s filters only need to be calculated once or twice in succession. However, it can take up to 15 cycles if e.g. the resonance is very high and the input is very complex e.g. includes noise. accuracy Click on the Main  button at the bottom of the window. In the Voice panel immediately above the Main  button are two selectors called Accuracy  and OfflineAcc . In the current version of Diva these are global parameters i.e. they remain fixed across all presets, per loaded instance: draft  .......... CPU-friendly, but FM will sound rough and resonance is primitive i.e. NOT zero delay! fast  ............ Fine for older computers and/or when you need more polyphony in acceptable quality great  ......... The best compromise between quality and polyphony on high-power computers divine ...... Top-quality zero delay feedback filters – but can your computer can handle it? OfflineAcc only has two options: same  or best   (i.e. divine  in the current version).Some host applications may have problems rendering to audio at the selected accuracy, but the better ones include an “inform plug-ins of offline rendering status” or similarly named option. TOC OSC HPF VCF ENV LFO EFX MODF TRIM ARP MIDI TIPS   4
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